cmd/protoc-gen-go-grpc: rework service registration (#3828)

Documentation/server-reflection-tutorial.md

@@ -28,7 +28,7 @@ make the following changes:
 @@ -61,6 +62,8 @@ func main() {
         }
         s := grpc.NewServer()
-        pb.RegisterGreeterServer(s, &server{})
+        pb.RegisterGreeterService(s, &pb.GreeterService{SayHello: sayHello})
 +       // Register reflection service on gRPC server.
 +       reflection.Register(s)
         if err := s.Serve(lis); err != nil {

balancer/grpclb/grpc_lb_v1/load_balancer.pb.go

@@ -4,10 +4,14 @@
 package grpc_lb_v1
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
 	duration "github.com/golang/protobuf/ptypes/duration"
 	timestamp "github.com/golang/protobuf/ptypes/timestamp"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -638,3 +642,117 @@ var fileDescriptor_7cd3f6d792743fdf = []byte{
 	0x6d, 0xe1, 0xbe, 0xfb, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x3f, 0x47, 0x55, 0xac, 0xab, 0x06, 0x00,
 	0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// LoadBalancerClient is the client API for LoadBalancer service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type LoadBalancerClient interface {
+	// Bidirectional rpc to get a list of servers.
+	BalanceLoad(ctx context.Context, opts ...grpc.CallOption) (LoadBalancer_BalanceLoadClient, error)
+}
+
+type loadBalancerClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewLoadBalancerClient(cc grpc.ClientConnInterface) LoadBalancerClient {
+	return &loadBalancerClient{cc}
+}
+
+func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...grpc.CallOption) (LoadBalancer_BalanceLoadClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_LoadBalancer_serviceDesc.Streams[0], "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &loadBalancerBalanceLoadClient{stream}
+	return x, nil
+}
+
+type LoadBalancer_BalanceLoadClient interface {
+	Send(*LoadBalanceRequest) error
+	Recv() (*LoadBalanceResponse, error)
+	grpc.ClientStream
+}
+
+type loadBalancerBalanceLoadClient struct {
+	grpc.ClientStream
+}
+
+func (x *loadBalancerBalanceLoadClient) Send(m *LoadBalanceRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *loadBalancerBalanceLoadClient) Recv() (*LoadBalanceResponse, error) {
+	m := new(LoadBalanceResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// LoadBalancerServer is the server API for LoadBalancer service.
+type LoadBalancerServer interface {
+	// Bidirectional rpc to get a list of servers.
+	BalanceLoad(LoadBalancer_BalanceLoadServer) error
+}
+
+// UnimplementedLoadBalancerServer can be embedded to have forward compatible implementations.
+type UnimplementedLoadBalancerServer struct {
+}
+
+func (*UnimplementedLoadBalancerServer) BalanceLoad(srv LoadBalancer_BalanceLoadServer) error {
+	return status.Errorf(codes.Unimplemented, "method BalanceLoad not implemented")
+}
+
+func RegisterLoadBalancerServer(s *grpc.Server, srv LoadBalancerServer) {
+	s.RegisterService(&_LoadBalancer_serviceDesc, srv)
+}
+
+func _LoadBalancer_BalanceLoad_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(LoadBalancerServer).BalanceLoad(&loadBalancerBalanceLoadServer{stream})
+}
+
+type LoadBalancer_BalanceLoadServer interface {
+	Send(*LoadBalanceResponse) error
+	Recv() (*LoadBalanceRequest, error)
+	grpc.ServerStream
+}
+
+type loadBalancerBalanceLoadServer struct {
+	grpc.ServerStream
+}
+
+func (x *loadBalancerBalanceLoadServer) Send(m *LoadBalanceResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *loadBalancerBalanceLoadServer) Recv() (*LoadBalanceRequest, error) {
+	m := new(LoadBalanceRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _LoadBalancer_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.lb.v1.LoadBalancer",
+	HandlerType: (*LoadBalancerServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "BalanceLoad",
+			Handler:       _LoadBalancer_BalanceLoad_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "grpc/lb/v1/load_balancer.proto",
+}

balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go

@@ -3,7 +3,6 @@
 package grpc_lb_v1
 
 import (
-	context "context"
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
@@ -11,112 +10,64 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// LoadBalancerClient is the client API for LoadBalancer service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type LoadBalancerClient interface {
+// LoadBalancerService is the service API for LoadBalancer service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterLoadBalancerService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type LoadBalancerService struct {
 	// Bidirectional rpc to get a list of servers.
-	BalanceLoad(ctx context.Context, opts ...grpc.CallOption) (LoadBalancer_BalanceLoadClient, error)
+	BalanceLoad func(LoadBalancer_BalanceLoadServer) error
 }
 
-type loadBalancerClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewLoadBalancerClient(cc grpc.ClientConnInterface) LoadBalancerClient {
-	return &loadBalancerClient{cc}
-}
-
-func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...grpc.CallOption) (LoadBalancer_BalanceLoadClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_LoadBalancer_serviceDesc.Streams[0], "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
-	if err != nil {
-		return nil, err
+func (s *LoadBalancerService) balanceLoad(_ interface{}, stream grpc.ServerStream) error {
+	if s.BalanceLoad == nil {
+		return status.Errorf(codes.Unimplemented, "method BalanceLoad not implemented")
 	}
-	x := &loadBalancerBalanceLoadClient{stream}
-	return x, nil
+	return s.BalanceLoad(&loadBalancerBalanceLoadServer{stream})
 }
 
-type LoadBalancer_BalanceLoadClient interface {
-	Send(*LoadBalanceRequest) error
-	Recv() (*LoadBalanceResponse, error)
-	grpc.ClientStream
-}
-
-type loadBalancerBalanceLoadClient struct {
-	grpc.ClientStream
-}
-
-func (x *loadBalancerBalanceLoadClient) Send(m *LoadBalanceRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *loadBalancerBalanceLoadClient) Recv() (*LoadBalanceResponse, error) {
-	m := new(LoadBalanceResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
+// RegisterLoadBalancerService registers a service implementation with a gRPC server.
+func RegisterLoadBalancerService(s grpc.ServiceRegistrar, srv *LoadBalancerService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.lb.v1.LoadBalancer",
+		Methods:     []grpc.MethodDesc{},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "BalanceLoad",
+				Handler:       srv.balanceLoad,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+		},
+		Metadata: "grpc/lb/v1/load_balancer.proto",
 	}
-	return m, nil
+
+	s.RegisterService(&sd, nil)
 }
 
-// LoadBalancerServer is the server API for LoadBalancer service.
-// All implementations should embed UnimplementedLoadBalancerServer
-// for forward compatibility
-type LoadBalancerServer interface {
+// NewLoadBalancerService creates a new LoadBalancerService containing the
+// implemented methods of the LoadBalancer service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewLoadBalancerService(s interface{}) *LoadBalancerService {
+	ns := &LoadBalancerService{}
+	if h, ok := s.(interface {
+		BalanceLoad(LoadBalancer_BalanceLoadServer) error
+	}); ok {
+		ns.BalanceLoad = h.BalanceLoad
+	}
+	return ns
+}
+
+// UnstableLoadBalancerService is the service API for LoadBalancer service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableLoadBalancerService interface {
 	// Bidirectional rpc to get a list of servers.
 	BalanceLoad(LoadBalancer_BalanceLoadServer) error
 }
-
-// UnimplementedLoadBalancerServer should be embedded to have forward compatible implementations.
-type UnimplementedLoadBalancerServer struct {
-}
-
-func (*UnimplementedLoadBalancerServer) BalanceLoad(LoadBalancer_BalanceLoadServer) error {
-	return status.Errorf(codes.Unimplemented, "method BalanceLoad not implemented")
-}
-
-func RegisterLoadBalancerServer(s *grpc.Server, srv LoadBalancerServer) {
-	s.RegisterService(&_LoadBalancer_serviceDesc, srv)
-}
-
-func _LoadBalancer_BalanceLoad_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(LoadBalancerServer).BalanceLoad(&loadBalancerBalanceLoadServer{stream})
-}
-
-type LoadBalancer_BalanceLoadServer interface {
-	Send(*LoadBalanceResponse) error
-	Recv() (*LoadBalanceRequest, error)
-	grpc.ServerStream
-}
-
-type loadBalancerBalanceLoadServer struct {
-	grpc.ServerStream
-}
-
-func (x *loadBalancerBalanceLoadServer) Send(m *LoadBalanceResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *loadBalancerBalanceLoadServer) Recv() (*LoadBalanceRequest, error) {
-	m := new(LoadBalanceRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _LoadBalancer_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.lb.v1.LoadBalancer",
-	HandlerType: (*LoadBalancerServer)(nil),
-	Methods:     []grpc.MethodDesc{},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "BalanceLoad",
-			Handler:       _LoadBalancer_BalanceLoad_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "grpc/lb/v1/load_balancer.proto",
-}

balancer/grpclb/grpclb_test.go

@@ -276,8 +276,6 @@ func (b *remoteBalancer) BalanceLoad(stream lbgrpc.LoadBalancer_BalanceLoadServe
 }
 
 type testServer struct {
-	testpb.UnimplementedTestServiceServer
-
 	addr     string
 	fallback bool
 }
@@ -306,7 +304,11 @@ func startBackends(sn string, fallback bool, lis ...net.Listener) (servers []*gr
 			sn: sn,
 		}
 		s := grpc.NewServer(grpc.Creds(creds))
-		testpb.RegisterTestServiceServer(s, &testServer{addr: l.Addr().String(), fallback: fallback})
+		ts := &testServer{addr: l.Addr().String(), fallback: fallback}
+		testpb.RegisterTestServiceService(s, &testpb.TestServiceService{
+			EmptyCall:      ts.EmptyCall,
+			FullDuplexCall: ts.FullDuplexCall,
+		})
 		servers = append(servers, s)
 		go func(s *grpc.Server, l net.Listener) {
 			s.Serve(l)

balancer/rls/internal/proto/grpc_lookup_v1/rls.pb.go

@@ -4,8 +4,12 @@
 package grpc_lookup_v1
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -176,3 +180,85 @@ var fileDescriptor_3bab962d3362f3ca = []byte{
 	0x29, 0xa7, 0xcf, 0x5e, 0xb3, 0x1d, 0x27, 0xef, 0x01, 0x00, 0x00, 0xff, 0xff, 0xca, 0x8d, 0x5c,
 	0xc7, 0x39, 0x02, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// RouteLookupServiceClient is the client API for RouteLookupService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type RouteLookupServiceClient interface {
+	// Lookup returns a target for a single key.
+	RouteLookup(ctx context.Context, in *RouteLookupRequest, opts ...grpc.CallOption) (*RouteLookupResponse, error)
+}
+
+type routeLookupServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewRouteLookupServiceClient(cc grpc.ClientConnInterface) RouteLookupServiceClient {
+	return &routeLookupServiceClient{cc}
+}
+
+func (c *routeLookupServiceClient) RouteLookup(ctx context.Context, in *RouteLookupRequest, opts ...grpc.CallOption) (*RouteLookupResponse, error) {
+	out := new(RouteLookupResponse)
+	err := c.cc.Invoke(ctx, "/grpc.lookup.v1.RouteLookupService/RouteLookup", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// RouteLookupServiceServer is the server API for RouteLookupService service.
+type RouteLookupServiceServer interface {
+	// Lookup returns a target for a single key.
+	RouteLookup(context.Context, *RouteLookupRequest) (*RouteLookupResponse, error)
+}
+
+// UnimplementedRouteLookupServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedRouteLookupServiceServer struct {
+}
+
+func (*UnimplementedRouteLookupServiceServer) RouteLookup(ctx context.Context, req *RouteLookupRequest) (*RouteLookupResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method RouteLookup not implemented")
+}
+
+func RegisterRouteLookupServiceServer(s *grpc.Server, srv RouteLookupServiceServer) {
+	s.RegisterService(&_RouteLookupService_serviceDesc, srv)
+}
+
+func _RouteLookupService_RouteLookup_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RouteLookupRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RouteLookupServiceServer).RouteLookup(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.lookup.v1.RouteLookupService/RouteLookup",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RouteLookupServiceServer).RouteLookup(ctx, req.(*RouteLookupRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _RouteLookupService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.lookup.v1.RouteLookupService",
+	HandlerType: (*RouteLookupServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "RouteLookup",
+			Handler:    _RouteLookupService_RouteLookup_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "grpc/lookup/v1/rls.proto",
+}

balancer/rls/internal/proto/grpc_lookup_v1/rls_grpc.pb.go

@@ -11,80 +11,76 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// RouteLookupServiceClient is the client API for RouteLookupService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type RouteLookupServiceClient interface {
+// RouteLookupServiceService is the service API for RouteLookupService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterRouteLookupServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type RouteLookupServiceService struct {
 	// Lookup returns a target for a single key.
-	RouteLookup(ctx context.Context, in *RouteLookupRequest, opts ...grpc.CallOption) (*RouteLookupResponse, error)
+	RouteLookup func(context.Context, *RouteLookupRequest) (*RouteLookupResponse, error)
 }
 
-type routeLookupServiceClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewRouteLookupServiceClient(cc grpc.ClientConnInterface) RouteLookupServiceClient {
-	return &routeLookupServiceClient{cc}
-}
-
-func (c *routeLookupServiceClient) RouteLookup(ctx context.Context, in *RouteLookupRequest, opts ...grpc.CallOption) (*RouteLookupResponse, error) {
-	out := new(RouteLookupResponse)
-	err := c.cc.Invoke(ctx, "/grpc.lookup.v1.RouteLookupService/RouteLookup", in, out, opts...)
-	if err != nil {
-		return nil, err
+func (s *RouteLookupServiceService) routeLookup(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.RouteLookup == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method RouteLookup not implemented")
 	}
-	return out, nil
-}
-
-// RouteLookupServiceServer is the server API for RouteLookupService service.
-// All implementations should embed UnimplementedRouteLookupServiceServer
-// for forward compatibility
-type RouteLookupServiceServer interface {
-	// Lookup returns a target for a single key.
-	RouteLookup(context.Context, *RouteLookupRequest) (*RouteLookupResponse, error)
-}
-
-// UnimplementedRouteLookupServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedRouteLookupServiceServer struct {
-}
-
-func (*UnimplementedRouteLookupServiceServer) RouteLookup(context.Context, *RouteLookupRequest) (*RouteLookupResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method RouteLookup not implemented")
-}
-
-func RegisterRouteLookupServiceServer(s *grpc.Server, srv RouteLookupServiceServer) {
-	s.RegisterService(&_RouteLookupService_serviceDesc, srv)
-}
-
-func _RouteLookupService_RouteLookup_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(RouteLookupRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(RouteLookupServiceServer).RouteLookup(ctx, in)
+		return s.RouteLookup(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.lookup.v1.RouteLookupService/RouteLookup",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(RouteLookupServiceServer).RouteLookup(ctx, req.(*RouteLookupRequest))
+		return s.RouteLookup(ctx, req.(*RouteLookupRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-var _RouteLookupService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.lookup.v1.RouteLookupService",
-	HandlerType: (*RouteLookupServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "RouteLookup",
-			Handler:    _RouteLookupService_RouteLookup_Handler,
+// RegisterRouteLookupServiceService registers a service implementation with a gRPC server.
+func RegisterRouteLookupServiceService(s grpc.ServiceRegistrar, srv *RouteLookupServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.lookup.v1.RouteLookupService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "RouteLookup",
+				Handler:    srv.routeLookup,
+			},
 		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "grpc/lookup/v1/rls.proto",
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "grpc/lookup/v1/rls.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewRouteLookupServiceService creates a new RouteLookupServiceService containing the
+// implemented methods of the RouteLookupService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewRouteLookupServiceService(s interface{}) *RouteLookupServiceService {
+	ns := &RouteLookupServiceService{}
+	if h, ok := s.(interface {
+		RouteLookup(context.Context, *RouteLookupRequest) (*RouteLookupResponse, error)
+	}); ok {
+		ns.RouteLookup = h.RouteLookup
+	}
+	return ns
+}
+
+// UnstableRouteLookupServiceService is the service API for RouteLookupService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableRouteLookupServiceService interface {
+	// Lookup returns a target for a single key.
+	RouteLookup(context.Context, *RouteLookupRequest) (*RouteLookupResponse, error)
 }

balancer/roundrobin/roundrobin_test.go

@@ -47,15 +47,11 @@ func Test(t *testing.T) {
 	grpctest.RunSubTests(t, s{})
 }
 
-type testServer struct {
-	testpb.UnimplementedTestServiceServer
-}
-
-func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
+func emptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
 	return &testpb.Empty{}, nil
 }
 
-func (s *testServer) FullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
+func fullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
 	return nil
 }
 
@@ -85,7 +81,10 @@ func startTestServers(count int) (_ *test, err error) {
 		}
 
 		s := grpc.NewServer()
-		testpb.RegisterTestServiceServer(s, &testServer{})
+		testpb.RegisterTestServiceService(s, &testpb.TestServiceService{
+			EmptyCall:      emptyCall,
+			FullDuplexCall: fullDuplexCall,
+		})
 		t.servers = append(t.servers, s)
 		t.addresses = append(t.addresses, lis.Addr().String())
 

benchmark/benchmark.go

@@ -61,9 +61,9 @@ func NewPayload(t testpb.PayloadType, size int) *testpb.Payload {
 	return p
 }
 
-type testServer struct {
-	testpb.UnimplementedBenchmarkServiceServer
-}
+type testServer struct{}
+
+var _ testpb.UnstableBenchmarkServiceService = (*testServer)(nil)
 
 func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
 	return &testpb.SimpleResponse{
@@ -144,10 +144,11 @@ func (s *testServer) UnconstrainedStreamingCall(stream testpb.BenchmarkService_U
 // byteBufServer is a gRPC server that sends and receives byte buffer.
 // The purpose is to benchmark the gRPC performance without protobuf serialization/deserialization overhead.
 type byteBufServer struct {
-	testpb.UnimplementedBenchmarkServiceServer
 	respSize int32
 }
 
+var _ testpb.UnstableBenchmarkServiceService = (*byteBufServer)(nil)
+
 // UnaryCall is an empty function and is not used for benchmark.
 // If bytebuf UnaryCall benchmark is needed later, the function body needs to be updated.
 func (s *byteBufServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
@@ -211,13 +212,13 @@ func StartServer(info ServerInfo, opts ...grpc.ServerOption) func() {
 	s := grpc.NewServer(opts...)
 	switch info.Type {
 	case "protobuf":
-		testpb.RegisterBenchmarkServiceServer(s, &testServer{})
+		testpb.RegisterBenchmarkServiceService(s, testpb.NewBenchmarkServiceService(&testServer{}))
 	case "bytebuf":
 		respSize, ok := info.Metadata.(int32)
 		if !ok {
 			logger.Fatalf("failed to StartServer, invalid metadata: %v, for Type: %v", info.Metadata, info.Type)
 		}
-		testpb.RegisterBenchmarkServiceServer(s, &byteBufServer{respSize: respSize})
+		testpb.RegisterBenchmarkServiceService(s, testpb.NewBenchmarkServiceService(&byteBufServer{respSize: respSize}))
 	default:
 		logger.Fatalf("failed to StartServer, unknown Type: %v", info.Type)
 	}

benchmark/grpc_testing/services_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // BenchmarkServiceClient is the client API for BenchmarkService service.
 //
@@ -36,6 +36,10 @@ func NewBenchmarkServiceClient(cc grpc.ClientConnInterface) BenchmarkServiceClie
 	return &benchmarkServiceClient{cc}
 }
 
+var benchmarkServiceUnaryCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "UnaryCall",
+}
+
 func (c *benchmarkServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
 	out := new(SimpleResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.BenchmarkService/UnaryCall", in, out, opts...)
@@ -45,8 +49,14 @@ func (c *benchmarkServiceClient) UnaryCall(ctx context.Context, in *SimpleReques
 	return out, nil
 }
 
+var benchmarkServiceStreamingCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "StreamingCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *benchmarkServiceClient) StreamingCall(ctx context.Context, opts ...grpc.CallOption) (BenchmarkService_StreamingCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_BenchmarkService_serviceDesc.Streams[0], "/grpc.testing.BenchmarkService/StreamingCall", opts...)
+	stream, err := c.cc.NewStream(ctx, benchmarkServiceStreamingCallStreamDesc, "/grpc.testing.BenchmarkService/StreamingCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -76,8 +86,14 @@ func (x *benchmarkServiceStreamingCallClient) Recv() (*SimpleResponse, error) {
 	return m, nil
 }
 
+var benchmarkServiceUnconstrainedStreamingCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "UnconstrainedStreamingCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *benchmarkServiceClient) UnconstrainedStreamingCall(ctx context.Context, opts ...grpc.CallOption) (BenchmarkService_UnconstrainedStreamingCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_BenchmarkService_serviceDesc.Streams[1], "/grpc.testing.BenchmarkService/UnconstrainedStreamingCall", opts...)
+	stream, err := c.cc.NewStream(ctx, benchmarkServiceUnconstrainedStreamingCallStreamDesc, "/grpc.testing.BenchmarkService/UnconstrainedStreamingCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -107,59 +123,53 @@ func (x *benchmarkServiceUnconstrainedStreamingCallClient) Recv() (*SimpleRespon
 	return m, nil
 }
 
-// BenchmarkServiceServer is the server API for BenchmarkService service.
-// All implementations should embed UnimplementedBenchmarkServiceServer
-// for forward compatibility
-type BenchmarkServiceServer interface {
+// BenchmarkServiceService is the service API for BenchmarkService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterBenchmarkServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type BenchmarkServiceService struct {
 	// One request followed by one response.
 	// The server returns the client payload as-is.
-	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	UnaryCall func(context.Context, *SimpleRequest) (*SimpleResponse, error)
 	// One request followed by one response.
 	// The server returns the client payload as-is.
-	StreamingCall(BenchmarkService_StreamingCallServer) error
+	StreamingCall func(BenchmarkService_StreamingCallServer) error
 	// Unconstrainted streaming.
 	// Both server and client keep sending & receiving simultaneously.
-	UnconstrainedStreamingCall(BenchmarkService_UnconstrainedStreamingCallServer) error
+	UnconstrainedStreamingCall func(BenchmarkService_UnconstrainedStreamingCallServer) error
 }
 
-// UnimplementedBenchmarkServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedBenchmarkServiceServer struct {
-}
-
-func (*UnimplementedBenchmarkServiceServer) UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
-}
-func (*UnimplementedBenchmarkServiceServer) StreamingCall(BenchmarkService_StreamingCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingCall not implemented")
-}
-func (*UnimplementedBenchmarkServiceServer) UnconstrainedStreamingCall(BenchmarkService_UnconstrainedStreamingCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method UnconstrainedStreamingCall not implemented")
-}
-
-func RegisterBenchmarkServiceServer(s *grpc.Server, srv BenchmarkServiceServer) {
-	s.RegisterService(&_BenchmarkService_serviceDesc, srv)
-}
-
-func _BenchmarkService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *BenchmarkServiceService) unaryCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.UnaryCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
+	}
 	in := new(SimpleRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(BenchmarkServiceServer).UnaryCall(ctx, in)
+		return s.UnaryCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.BenchmarkService/UnaryCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BenchmarkServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+		return s.UnaryCall(ctx, req.(*SimpleRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _BenchmarkService_StreamingCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(BenchmarkServiceServer).StreamingCall(&benchmarkServiceStreamingCallServer{stream})
+func (s *BenchmarkServiceService) streamingCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.StreamingCall == nil {
+		return status.Errorf(codes.Unimplemented, "method StreamingCall not implemented")
+	}
+	return s.StreamingCall(&benchmarkServiceStreamingCallServer{stream})
+}
+func (s *BenchmarkServiceService) unconstrainedStreamingCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.UnconstrainedStreamingCall == nil {
+		return status.Errorf(codes.Unimplemented, "method UnconstrainedStreamingCall not implemented")
+	}
+	return s.UnconstrainedStreamingCall(&benchmarkServiceUnconstrainedStreamingCallServer{stream})
 }
 
 type BenchmarkService_StreamingCallServer interface {
@@ -184,10 +194,6 @@ func (x *benchmarkServiceStreamingCallServer) Recv() (*SimpleRequest, error) {
 	return m, nil
 }
 
-func _BenchmarkService_UnconstrainedStreamingCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(BenchmarkServiceServer).UnconstrainedStreamingCall(&benchmarkServiceUnconstrainedStreamingCallServer{stream})
-}
-
 type BenchmarkService_UnconstrainedStreamingCallServer interface {
 	Send(*SimpleResponse) error
 	Recv() (*SimpleRequest, error)
@@ -210,30 +216,76 @@ func (x *benchmarkServiceUnconstrainedStreamingCallServer) Recv() (*SimpleReques
 	return m, nil
 }
 
-var _BenchmarkService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.BenchmarkService",
-	HandlerType: (*BenchmarkServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "UnaryCall",
-			Handler:    _BenchmarkService_UnaryCall_Handler,
+// RegisterBenchmarkServiceService registers a service implementation with a gRPC server.
+func RegisterBenchmarkServiceService(s grpc.ServiceRegistrar, srv *BenchmarkServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.BenchmarkService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "UnaryCall",
+				Handler:    srv.unaryCall,
+			},
 		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "StreamingCall",
-			Handler:       _BenchmarkService_StreamingCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "StreamingCall",
+				Handler:       srv.streamingCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "UnconstrainedStreamingCall",
+				Handler:       srv.unconstrainedStreamingCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
 		},
-		{
-			StreamName:    "UnconstrainedStreamingCall",
-			Handler:       _BenchmarkService_UnconstrainedStreamingCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "benchmark/grpc_testing/services.proto",
+		Metadata: "benchmark/grpc_testing/services.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewBenchmarkServiceService creates a new BenchmarkServiceService containing the
+// implemented methods of the BenchmarkService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewBenchmarkServiceService(s interface{}) *BenchmarkServiceService {
+	ns := &BenchmarkServiceService{}
+	if h, ok := s.(interface {
+		UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	}); ok {
+		ns.UnaryCall = h.UnaryCall
+	}
+	if h, ok := s.(interface {
+		StreamingCall(BenchmarkService_StreamingCallServer) error
+	}); ok {
+		ns.StreamingCall = h.StreamingCall
+	}
+	if h, ok := s.(interface {
+		UnconstrainedStreamingCall(BenchmarkService_UnconstrainedStreamingCallServer) error
+	}); ok {
+		ns.UnconstrainedStreamingCall = h.UnconstrainedStreamingCall
+	}
+	return ns
+}
+
+// UnstableBenchmarkServiceService is the service API for BenchmarkService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableBenchmarkServiceService interface {
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	StreamingCall(BenchmarkService_StreamingCallServer) error
+	// Unconstrainted streaming.
+	// Both server and client keep sending & receiving simultaneously.
+	UnconstrainedStreamingCall(BenchmarkService_UnconstrainedStreamingCallServer) error
 }
 
 // WorkerServiceClient is the client API for WorkerService service.
@@ -268,8 +320,14 @@ func NewWorkerServiceClient(cc grpc.ClientConnInterface) WorkerServiceClient {
 	return &workerServiceClient{cc}
 }
 
+var workerServiceRunServerStreamDesc = &grpc.StreamDesc{
+	StreamName:    "RunServer",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *workerServiceClient) RunServer(ctx context.Context, opts ...grpc.CallOption) (WorkerService_RunServerClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_WorkerService_serviceDesc.Streams[0], "/grpc.testing.WorkerService/RunServer", opts...)
+	stream, err := c.cc.NewStream(ctx, workerServiceRunServerStreamDesc, "/grpc.testing.WorkerService/RunServer", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -299,8 +357,14 @@ func (x *workerServiceRunServerClient) Recv() (*ServerStatus, error) {
 	return m, nil
 }
 
+var workerServiceRunClientStreamDesc = &grpc.StreamDesc{
+	StreamName:    "RunClient",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *workerServiceClient) RunClient(ctx context.Context, opts ...grpc.CallOption) (WorkerService_RunClientClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_WorkerService_serviceDesc.Streams[1], "/grpc.testing.WorkerService/RunClient", opts...)
+	stream, err := c.cc.NewStream(ctx, workerServiceRunClientStreamDesc, "/grpc.testing.WorkerService/RunClient", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -330,6 +394,10 @@ func (x *workerServiceRunClientClient) Recv() (*ClientStatus, error) {
 	return m, nil
 }
 
+var workerServiceCoreCountStreamDesc = &grpc.StreamDesc{
+	StreamName: "CoreCount",
+}
+
 func (c *workerServiceClient) CoreCount(ctx context.Context, in *CoreRequest, opts ...grpc.CallOption) (*CoreResponse, error) {
 	out := new(CoreResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.WorkerService/CoreCount", in, out, opts...)
@@ -339,6 +407,10 @@ func (c *workerServiceClient) CoreCount(ctx context.Context, in *CoreRequest, op
 	return out, nil
 }
 
+var workerServiceQuitWorkerStreamDesc = &grpc.StreamDesc{
+	StreamName: "QuitWorker",
+}
+
 func (c *workerServiceClient) QuitWorker(ctx context.Context, in *Void, opts ...grpc.CallOption) (*Void, error) {
 	out := new(Void)
 	err := c.cc.Invoke(ctx, "/grpc.testing.WorkerService/QuitWorker", in, out, opts...)
@@ -348,53 +420,82 @@ func (c *workerServiceClient) QuitWorker(ctx context.Context, in *Void, opts ...
 	return out, nil
 }
 
-// WorkerServiceServer is the server API for WorkerService service.
-// All implementations should embed UnimplementedWorkerServiceServer
-// for forward compatibility
-type WorkerServiceServer interface {
+// WorkerServiceService is the service API for WorkerService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterWorkerServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type WorkerServiceService struct {
 	// Start server with specified workload.
 	// First request sent specifies the ServerConfig followed by ServerStatus
 	// response. After that, a "Mark" can be sent anytime to request the latest
 	// stats. Closing the stream will initiate shutdown of the test server
 	// and once the shutdown has finished, the OK status is sent to terminate
 	// this RPC.
-	RunServer(WorkerService_RunServerServer) error
+	RunServer func(WorkerService_RunServerServer) error
 	// Start client with specified workload.
 	// First request sent specifies the ClientConfig followed by ClientStatus
 	// response. After that, a "Mark" can be sent anytime to request the latest
 	// stats. Closing the stream will initiate shutdown of the test client
 	// and once the shutdown has finished, the OK status is sent to terminate
 	// this RPC.
-	RunClient(WorkerService_RunClientServer) error
+	RunClient func(WorkerService_RunClientServer) error
 	// Just return the core count - unary call
-	CoreCount(context.Context, *CoreRequest) (*CoreResponse, error)
+	CoreCount func(context.Context, *CoreRequest) (*CoreResponse, error)
 	// Quit this worker
-	QuitWorker(context.Context, *Void) (*Void, error)
+	QuitWorker func(context.Context, *Void) (*Void, error)
 }
 
-// UnimplementedWorkerServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedWorkerServiceServer struct {
+func (s *WorkerServiceService) runServer(_ interface{}, stream grpc.ServerStream) error {
+	if s.RunServer == nil {
+		return status.Errorf(codes.Unimplemented, "method RunServer not implemented")
+	}
+	return s.RunServer(&workerServiceRunServerServer{stream})
 }
-
-func (*UnimplementedWorkerServiceServer) RunServer(WorkerService_RunServerServer) error {
-	return status.Errorf(codes.Unimplemented, "method RunServer not implemented")
+func (s *WorkerServiceService) runClient(_ interface{}, stream grpc.ServerStream) error {
+	if s.RunClient == nil {
+		return status.Errorf(codes.Unimplemented, "method RunClient not implemented")
+	}
+	return s.RunClient(&workerServiceRunClientServer{stream})
 }
-func (*UnimplementedWorkerServiceServer) RunClient(WorkerService_RunClientServer) error {
-	return status.Errorf(codes.Unimplemented, "method RunClient not implemented")
+func (s *WorkerServiceService) coreCount(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.CoreCount == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method CoreCount not implemented")
+	}
+	in := new(CoreRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return s.CoreCount(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.testing.WorkerService/CoreCount",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.CoreCount(ctx, req.(*CoreRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-func (*UnimplementedWorkerServiceServer) CoreCount(context.Context, *CoreRequest) (*CoreResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method CoreCount not implemented")
-}
-func (*UnimplementedWorkerServiceServer) QuitWorker(context.Context, *Void) (*Void, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method QuitWorker not implemented")
-}
-
-func RegisterWorkerServiceServer(s *grpc.Server, srv WorkerServiceServer) {
-	s.RegisterService(&_WorkerService_serviceDesc, srv)
-}
-
-func _WorkerService_RunServer_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(WorkerServiceServer).RunServer(&workerServiceRunServerServer{stream})
+func (s *WorkerServiceService) quitWorker(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.QuitWorker == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method QuitWorker not implemented")
+	}
+	in := new(Void)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return s.QuitWorker(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.testing.WorkerService/QuitWorker",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.QuitWorker(ctx, req.(*Void))
+	}
+	return interceptor(ctx, in, info, handler)
 }
 
 type WorkerService_RunServerServer interface {
@@ -419,10 +520,6 @@ func (x *workerServiceRunServerServer) Recv() (*ServerArgs, error) {
 	return m, nil
 }
 
-func _WorkerService_RunClient_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(WorkerServiceServer).RunClient(&workerServiceRunClientServer{stream})
-}
-
 type WorkerService_RunClientServer interface {
 	Send(*ClientStatus) error
 	Recv() (*ClientArgs, error)
@@ -445,68 +542,92 @@ func (x *workerServiceRunClientServer) Recv() (*ClientArgs, error) {
 	return m, nil
 }
 
-func _WorkerService_CoreCount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(CoreRequest)
-	if err := dec(in); err != nil {
-		return nil, err
+// RegisterWorkerServiceService registers a service implementation with a gRPC server.
+func RegisterWorkerServiceService(s grpc.ServiceRegistrar, srv *WorkerServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.WorkerService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "CoreCount",
+				Handler:    srv.coreCount,
+			},
+			{
+				MethodName: "QuitWorker",
+				Handler:    srv.quitWorker,
+			},
+		},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "RunServer",
+				Handler:       srv.runServer,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "RunClient",
+				Handler:       srv.runClient,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+		},
+		Metadata: "benchmark/grpc_testing/services.proto",
 	}
-	if interceptor == nil {
-		return srv.(WorkerServiceServer).CoreCount(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.testing.WorkerService/CoreCount",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(WorkerServiceServer).CoreCount(ctx, req.(*CoreRequest))
-	}
-	return interceptor(ctx, in, info, handler)
+
+	s.RegisterService(&sd, nil)
 }
 
-func _WorkerService_QuitWorker_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(Void)
-	if err := dec(in); err != nil {
-		return nil, err
+// NewWorkerServiceService creates a new WorkerServiceService containing the
+// implemented methods of the WorkerService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewWorkerServiceService(s interface{}) *WorkerServiceService {
+	ns := &WorkerServiceService{}
+	if h, ok := s.(interface {
+		RunServer(WorkerService_RunServerServer) error
+	}); ok {
+		ns.RunServer = h.RunServer
 	}
-	if interceptor == nil {
-		return srv.(WorkerServiceServer).QuitWorker(ctx, in)
+	if h, ok := s.(interface {
+		RunClient(WorkerService_RunClientServer) error
+	}); ok {
+		ns.RunClient = h.RunClient
 	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.testing.WorkerService/QuitWorker",
+	if h, ok := s.(interface {
+		CoreCount(context.Context, *CoreRequest) (*CoreResponse, error)
+	}); ok {
+		ns.CoreCount = h.CoreCount
 	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(WorkerServiceServer).QuitWorker(ctx, req.(*Void))
+	if h, ok := s.(interface {
+		QuitWorker(context.Context, *Void) (*Void, error)
+	}); ok {
+		ns.QuitWorker = h.QuitWorker
 	}
-	return interceptor(ctx, in, info, handler)
+	return ns
 }
 
-var _WorkerService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.WorkerService",
-	HandlerType: (*WorkerServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "CoreCount",
-			Handler:    _WorkerService_CoreCount_Handler,
-		},
-		{
-			MethodName: "QuitWorker",
-			Handler:    _WorkerService_QuitWorker_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "RunServer",
-			Handler:       _WorkerService_RunServer_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "RunClient",
-			Handler:       _WorkerService_RunClient_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "benchmark/grpc_testing/services.proto",
+// UnstableWorkerServiceService is the service API for WorkerService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableWorkerServiceService interface {
+	// Start server with specified workload.
+	// First request sent specifies the ServerConfig followed by ServerStatus
+	// response. After that, a "Mark" can be sent anytime to request the latest
+	// stats. Closing the stream will initiate shutdown of the test server
+	// and once the shutdown has finished, the OK status is sent to terminate
+	// this RPC.
+	RunServer(WorkerService_RunServerServer) error
+	// Start client with specified workload.
+	// First request sent specifies the ClientConfig followed by ClientStatus
+	// response. After that, a "Mark" can be sent anytime to request the latest
+	// stats. Closing the stream will initiate shutdown of the test client
+	// and once the shutdown has finished, the OK status is sent to terminate
+	// this RPC.
+	RunClient(WorkerService_RunClientServer) error
+	// Just return the core count - unary call
+	CoreCount(context.Context, *CoreRequest) (*CoreResponse, error)
+	// Quit this worker
+	QuitWorker(context.Context, *Void) (*Void, error)
 }

benchmark/worker/main.go

@@ -75,11 +75,12 @@ func (byteBufCodec) String() string {
 // workerServer implements WorkerService rpc handlers.
 // It can create benchmarkServer or benchmarkClient on demand.
 type workerServer struct {
-	testpb.UnimplementedWorkerServiceServer
 	stop       chan<- bool
 	serverPort int
 }
 
+var _ testpb.UnstableWorkerServiceService = (*workerServer)(nil)
+
 func (s *workerServer) RunServer(stream testpb.WorkerService_RunServerServer) error {
 	var bs *benchmarkServer
 	defer func() {
@@ -209,10 +210,10 @@ func main() {
 
 	s := grpc.NewServer()
 	stop := make(chan bool)
-	testpb.RegisterWorkerServiceServer(s, &workerServer{
+	testpb.RegisterWorkerServiceService(s, testpb.NewWorkerServiceService(&workerServer{
 		stop:       stop,
 		serverPort: *serverPort,
-	})
+	}))
 
 	go func() {
 		<-stop

channelz/grpc_channelz_v1/channelz.pb.go

@@ -4,12 +4,16 @@
 package grpc_channelz_v1
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
 	any "github.com/golang/protobuf/ptypes/any"
 	duration "github.com/golang/protobuf/ptypes/duration"
 	timestamp "github.com/golang/protobuf/ptypes/timestamp"
 	wrappers "github.com/golang/protobuf/ptypes/wrappers"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -2921,3 +2925,315 @@ var fileDescriptor_6ee37dfd35a8ab00 = []byte{
 	0xd3, 0x77, 0xc6, 0x68, 0xe7, 0x3c, 0xcf, 0x4f, 0xf3, 0x5f, 0xfd, 0x37, 0x00, 0x00, 0xff, 0xff,
 	0x54, 0xae, 0x0b, 0x93, 0xdf, 0x1f, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// ChannelzClient is the client API for Channelz service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type ChannelzClient interface {
+	// Gets all root channels (i.e. channels the application has directly
+	// created). This does not include subchannels nor non-top level channels.
+	GetTopChannels(ctx context.Context, in *GetTopChannelsRequest, opts ...grpc.CallOption) (*GetTopChannelsResponse, error)
+	// Gets all servers that exist in the process.
+	GetServers(ctx context.Context, in *GetServersRequest, opts ...grpc.CallOption) (*GetServersResponse, error)
+	// Returns a single Server, or else a NOT_FOUND code.
+	GetServer(ctx context.Context, in *GetServerRequest, opts ...grpc.CallOption) (*GetServerResponse, error)
+	// Gets all server sockets that exist in the process.
+	GetServerSockets(ctx context.Context, in *GetServerSocketsRequest, opts ...grpc.CallOption) (*GetServerSocketsResponse, error)
+	// Returns a single Channel, or else a NOT_FOUND code.
+	GetChannel(ctx context.Context, in *GetChannelRequest, opts ...grpc.CallOption) (*GetChannelResponse, error)
+	// Returns a single Subchannel, or else a NOT_FOUND code.
+	GetSubchannel(ctx context.Context, in *GetSubchannelRequest, opts ...grpc.CallOption) (*GetSubchannelResponse, error)
+	// Returns a single Socket or else a NOT_FOUND code.
+	GetSocket(ctx context.Context, in *GetSocketRequest, opts ...grpc.CallOption) (*GetSocketResponse, error)
+}
+
+type channelzClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewChannelzClient(cc grpc.ClientConnInterface) ChannelzClient {
+	return &channelzClient{cc}
+}
+
+func (c *channelzClient) GetTopChannels(ctx context.Context, in *GetTopChannelsRequest, opts ...grpc.CallOption) (*GetTopChannelsResponse, error) {
+	out := new(GetTopChannelsResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetTopChannels", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *channelzClient) GetServers(ctx context.Context, in *GetServersRequest, opts ...grpc.CallOption) (*GetServersResponse, error) {
+	out := new(GetServersResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetServers", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *channelzClient) GetServer(ctx context.Context, in *GetServerRequest, opts ...grpc.CallOption) (*GetServerResponse, error) {
+	out := new(GetServerResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetServer", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *channelzClient) GetServerSockets(ctx context.Context, in *GetServerSocketsRequest, opts ...grpc.CallOption) (*GetServerSocketsResponse, error) {
+	out := new(GetServerSocketsResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetServerSockets", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *channelzClient) GetChannel(ctx context.Context, in *GetChannelRequest, opts ...grpc.CallOption) (*GetChannelResponse, error) {
+	out := new(GetChannelResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetChannel", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *channelzClient) GetSubchannel(ctx context.Context, in *GetSubchannelRequest, opts ...grpc.CallOption) (*GetSubchannelResponse, error) {
+	out := new(GetSubchannelResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetSubchannel", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *channelzClient) GetSocket(ctx context.Context, in *GetSocketRequest, opts ...grpc.CallOption) (*GetSocketResponse, error) {
+	out := new(GetSocketResponse)
+	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetSocket", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ChannelzServer is the server API for Channelz service.
+type ChannelzServer interface {
+	// Gets all root channels (i.e. channels the application has directly
+	// created). This does not include subchannels nor non-top level channels.
+	GetTopChannels(context.Context, *GetTopChannelsRequest) (*GetTopChannelsResponse, error)
+	// Gets all servers that exist in the process.
+	GetServers(context.Context, *GetServersRequest) (*GetServersResponse, error)
+	// Returns a single Server, or else a NOT_FOUND code.
+	GetServer(context.Context, *GetServerRequest) (*GetServerResponse, error)
+	// Gets all server sockets that exist in the process.
+	GetServerSockets(context.Context, *GetServerSocketsRequest) (*GetServerSocketsResponse, error)
+	// Returns a single Channel, or else a NOT_FOUND code.
+	GetChannel(context.Context, *GetChannelRequest) (*GetChannelResponse, error)
+	// Returns a single Subchannel, or else a NOT_FOUND code.
+	GetSubchannel(context.Context, *GetSubchannelRequest) (*GetSubchannelResponse, error)
+	// Returns a single Socket or else a NOT_FOUND code.
+	GetSocket(context.Context, *GetSocketRequest) (*GetSocketResponse, error)
+}
+
+// UnimplementedChannelzServer can be embedded to have forward compatible implementations.
+type UnimplementedChannelzServer struct {
+}
+
+func (*UnimplementedChannelzServer) GetTopChannels(ctx context.Context, req *GetTopChannelsRequest) (*GetTopChannelsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetTopChannels not implemented")
+}
+func (*UnimplementedChannelzServer) GetServers(ctx context.Context, req *GetServersRequest) (*GetServersResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetServers not implemented")
+}
+func (*UnimplementedChannelzServer) GetServer(ctx context.Context, req *GetServerRequest) (*GetServerResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetServer not implemented")
+}
+func (*UnimplementedChannelzServer) GetServerSockets(ctx context.Context, req *GetServerSocketsRequest) (*GetServerSocketsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetServerSockets not implemented")
+}
+func (*UnimplementedChannelzServer) GetChannel(ctx context.Context, req *GetChannelRequest) (*GetChannelResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetChannel not implemented")
+}
+func (*UnimplementedChannelzServer) GetSubchannel(ctx context.Context, req *GetSubchannelRequest) (*GetSubchannelResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetSubchannel not implemented")
+}
+func (*UnimplementedChannelzServer) GetSocket(ctx context.Context, req *GetSocketRequest) (*GetSocketResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetSocket not implemented")
+}
+
+func RegisterChannelzServer(s *grpc.Server, srv ChannelzServer) {
+	s.RegisterService(&_Channelz_serviceDesc, srv)
+}
+
+func _Channelz_GetTopChannels_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetTopChannelsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetTopChannels(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetTopChannels",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetTopChannels(ctx, req.(*GetTopChannelsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Channelz_GetServers_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetServersRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetServers(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetServers",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetServers(ctx, req.(*GetServersRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Channelz_GetServer_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetServerRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetServer(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetServer",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetServer(ctx, req.(*GetServerRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Channelz_GetServerSockets_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetServerSocketsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetServerSockets(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetServerSockets",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetServerSockets(ctx, req.(*GetServerSocketsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Channelz_GetChannel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetChannelRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetChannel(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetChannel",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetChannel(ctx, req.(*GetChannelRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Channelz_GetSubchannel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetSubchannelRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetSubchannel(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetSubchannel",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetSubchannel(ctx, req.(*GetSubchannelRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Channelz_GetSocket_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetSocketRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChannelzServer).GetSocket(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetSocket",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChannelzServer).GetSocket(ctx, req.(*GetSocketRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Channelz_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.channelz.v1.Channelz",
+	HandlerType: (*ChannelzServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetTopChannels",
+			Handler:    _Channelz_GetTopChannels_Handler,
+		},
+		{
+			MethodName: "GetServers",
+			Handler:    _Channelz_GetServers_Handler,
+		},
+		{
+			MethodName: "GetServer",
+			Handler:    _Channelz_GetServer_Handler,
+		},
+		{
+			MethodName: "GetServerSockets",
+			Handler:    _Channelz_GetServerSockets_Handler,
+		},
+		{
+			MethodName: "GetChannel",
+			Handler:    _Channelz_GetChannel_Handler,
+		},
+		{
+			MethodName: "GetSubchannel",
+			Handler:    _Channelz_GetSubchannel_Handler,
+		},
+		{
+			MethodName: "GetSocket",
+			Handler:    _Channelz_GetSocket_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "grpc/channelz/v1/channelz.proto",
+}

channelz/grpc_channelz_v1/channelz_grpc.pb.go

@@ -11,104 +11,263 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// ChannelzClient is the client API for Channelz service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type ChannelzClient interface {
+// ChannelzService is the service API for Channelz service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterChannelzService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type ChannelzService struct {
 	// Gets all root channels (i.e. channels the application has directly
 	// created). This does not include subchannels nor non-top level channels.
-	GetTopChannels(ctx context.Context, in *GetTopChannelsRequest, opts ...grpc.CallOption) (*GetTopChannelsResponse, error)
+	GetTopChannels func(context.Context, *GetTopChannelsRequest) (*GetTopChannelsResponse, error)
 	// Gets all servers that exist in the process.
-	GetServers(ctx context.Context, in *GetServersRequest, opts ...grpc.CallOption) (*GetServersResponse, error)
+	GetServers func(context.Context, *GetServersRequest) (*GetServersResponse, error)
 	// Returns a single Server, or else a NOT_FOUND code.
-	GetServer(ctx context.Context, in *GetServerRequest, opts ...grpc.CallOption) (*GetServerResponse, error)
+	GetServer func(context.Context, *GetServerRequest) (*GetServerResponse, error)
 	// Gets all server sockets that exist in the process.
-	GetServerSockets(ctx context.Context, in *GetServerSocketsRequest, opts ...grpc.CallOption) (*GetServerSocketsResponse, error)
+	GetServerSockets func(context.Context, *GetServerSocketsRequest) (*GetServerSocketsResponse, error)
 	// Returns a single Channel, or else a NOT_FOUND code.
-	GetChannel(ctx context.Context, in *GetChannelRequest, opts ...grpc.CallOption) (*GetChannelResponse, error)
+	GetChannel func(context.Context, *GetChannelRequest) (*GetChannelResponse, error)
 	// Returns a single Subchannel, or else a NOT_FOUND code.
-	GetSubchannel(ctx context.Context, in *GetSubchannelRequest, opts ...grpc.CallOption) (*GetSubchannelResponse, error)
+	GetSubchannel func(context.Context, *GetSubchannelRequest) (*GetSubchannelResponse, error)
 	// Returns a single Socket or else a NOT_FOUND code.
-	GetSocket(ctx context.Context, in *GetSocketRequest, opts ...grpc.CallOption) (*GetSocketResponse, error)
+	GetSocket func(context.Context, *GetSocketRequest) (*GetSocketResponse, error)
 }
 
-type channelzClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewChannelzClient(cc grpc.ClientConnInterface) ChannelzClient {
-	return &channelzClient{cc}
-}
-
-func (c *channelzClient) GetTopChannels(ctx context.Context, in *GetTopChannelsRequest, opts ...grpc.CallOption) (*GetTopChannelsResponse, error) {
-	out := new(GetTopChannelsResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetTopChannels", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getTopChannels(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetTopChannels == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetTopChannels not implemented")
+	}
+	in := new(GetTopChannelsRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetTopChannels(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetTopChannels",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetTopChannels(ctx, req.(*GetTopChannelsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *channelzClient) GetServers(ctx context.Context, in *GetServersRequest, opts ...grpc.CallOption) (*GetServersResponse, error) {
-	out := new(GetServersResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetServers", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getServers(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetServers == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetServers not implemented")
+	}
+	in := new(GetServersRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetServers(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetServers",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetServers(ctx, req.(*GetServersRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *channelzClient) GetServer(ctx context.Context, in *GetServerRequest, opts ...grpc.CallOption) (*GetServerResponse, error) {
-	out := new(GetServerResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetServer", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getServer(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetServer == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetServer not implemented")
+	}
+	in := new(GetServerRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetServer(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetServer",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetServer(ctx, req.(*GetServerRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *channelzClient) GetServerSockets(ctx context.Context, in *GetServerSocketsRequest, opts ...grpc.CallOption) (*GetServerSocketsResponse, error) {
-	out := new(GetServerSocketsResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetServerSockets", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getServerSockets(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetServerSockets == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetServerSockets not implemented")
+	}
+	in := new(GetServerSocketsRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetServerSockets(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetServerSockets",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetServerSockets(ctx, req.(*GetServerSocketsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *channelzClient) GetChannel(ctx context.Context, in *GetChannelRequest, opts ...grpc.CallOption) (*GetChannelResponse, error) {
-	out := new(GetChannelResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetChannel", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getChannel(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetChannel == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetChannel not implemented")
+	}
+	in := new(GetChannelRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetChannel(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetChannel",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetChannel(ctx, req.(*GetChannelRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *channelzClient) GetSubchannel(ctx context.Context, in *GetSubchannelRequest, opts ...grpc.CallOption) (*GetSubchannelResponse, error) {
-	out := new(GetSubchannelResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetSubchannel", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getSubchannel(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetSubchannel == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetSubchannel not implemented")
+	}
+	in := new(GetSubchannelRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetSubchannel(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetSubchannel",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetSubchannel(ctx, req.(*GetSubchannelRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *channelzClient) GetSocket(ctx context.Context, in *GetSocketRequest, opts ...grpc.CallOption) (*GetSocketResponse, error) {
-	out := new(GetSocketResponse)
-	err := c.cc.Invoke(ctx, "/grpc.channelz.v1.Channelz/GetSocket", in, out, opts...)
-	if err != nil {
+func (s *ChannelzService) getSocket(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetSocket == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetSocket not implemented")
+	}
+	in := new(GetSocketRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetSocket(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.channelz.v1.Channelz/GetSocket",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetSocket(ctx, req.(*GetSocketRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
 
-// ChannelzServer is the server API for Channelz service.
-// All implementations should embed UnimplementedChannelzServer
-// for forward compatibility
-type ChannelzServer interface {
+// RegisterChannelzService registers a service implementation with a gRPC server.
+func RegisterChannelzService(s grpc.ServiceRegistrar, srv *ChannelzService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.channelz.v1.Channelz",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "GetTopChannels",
+				Handler:    srv.getTopChannels,
+			},
+			{
+				MethodName: "GetServers",
+				Handler:    srv.getServers,
+			},
+			{
+				MethodName: "GetServer",
+				Handler:    srv.getServer,
+			},
+			{
+				MethodName: "GetServerSockets",
+				Handler:    srv.getServerSockets,
+			},
+			{
+				MethodName: "GetChannel",
+				Handler:    srv.getChannel,
+			},
+			{
+				MethodName: "GetSubchannel",
+				Handler:    srv.getSubchannel,
+			},
+			{
+				MethodName: "GetSocket",
+				Handler:    srv.getSocket,
+			},
+		},
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "grpc/channelz/v1/channelz.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewChannelzService creates a new ChannelzService containing the
+// implemented methods of the Channelz service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewChannelzService(s interface{}) *ChannelzService {
+	ns := &ChannelzService{}
+	if h, ok := s.(interface {
+		GetTopChannels(context.Context, *GetTopChannelsRequest) (*GetTopChannelsResponse, error)
+	}); ok {
+		ns.GetTopChannels = h.GetTopChannels
+	}
+	if h, ok := s.(interface {
+		GetServers(context.Context, *GetServersRequest) (*GetServersResponse, error)
+	}); ok {
+		ns.GetServers = h.GetServers
+	}
+	if h, ok := s.(interface {
+		GetServer(context.Context, *GetServerRequest) (*GetServerResponse, error)
+	}); ok {
+		ns.GetServer = h.GetServer
+	}
+	if h, ok := s.(interface {
+		GetServerSockets(context.Context, *GetServerSocketsRequest) (*GetServerSocketsResponse, error)
+	}); ok {
+		ns.GetServerSockets = h.GetServerSockets
+	}
+	if h, ok := s.(interface {
+		GetChannel(context.Context, *GetChannelRequest) (*GetChannelResponse, error)
+	}); ok {
+		ns.GetChannel = h.GetChannel
+	}
+	if h, ok := s.(interface {
+		GetSubchannel(context.Context, *GetSubchannelRequest) (*GetSubchannelResponse, error)
+	}); ok {
+		ns.GetSubchannel = h.GetSubchannel
+	}
+	if h, ok := s.(interface {
+		GetSocket(context.Context, *GetSocketRequest) (*GetSocketResponse, error)
+	}); ok {
+		ns.GetSocket = h.GetSocket
+	}
+	return ns
+}
+
+// UnstableChannelzService is the service API for Channelz service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableChannelzService interface {
 	// Gets all root channels (i.e. channels the application has directly
 	// created). This does not include subchannels nor non-top level channels.
 	GetTopChannels(context.Context, *GetTopChannelsRequest) (*GetTopChannelsResponse, error)
@@ -125,196 +284,3 @@ type ChannelzServer interface {
 	// Returns a single Socket or else a NOT_FOUND code.
 	GetSocket(context.Context, *GetSocketRequest) (*GetSocketResponse, error)
 }
-
-// UnimplementedChannelzServer should be embedded to have forward compatible implementations.
-type UnimplementedChannelzServer struct {
-}
-
-func (*UnimplementedChannelzServer) GetTopChannels(context.Context, *GetTopChannelsRequest) (*GetTopChannelsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetTopChannels not implemented")
-}
-func (*UnimplementedChannelzServer) GetServers(context.Context, *GetServersRequest) (*GetServersResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetServers not implemented")
-}
-func (*UnimplementedChannelzServer) GetServer(context.Context, *GetServerRequest) (*GetServerResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetServer not implemented")
-}
-func (*UnimplementedChannelzServer) GetServerSockets(context.Context, *GetServerSocketsRequest) (*GetServerSocketsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetServerSockets not implemented")
-}
-func (*UnimplementedChannelzServer) GetChannel(context.Context, *GetChannelRequest) (*GetChannelResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetChannel not implemented")
-}
-func (*UnimplementedChannelzServer) GetSubchannel(context.Context, *GetSubchannelRequest) (*GetSubchannelResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetSubchannel not implemented")
-}
-func (*UnimplementedChannelzServer) GetSocket(context.Context, *GetSocketRequest) (*GetSocketResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetSocket not implemented")
-}
-
-func RegisterChannelzServer(s *grpc.Server, srv ChannelzServer) {
-	s.RegisterService(&_Channelz_serviceDesc, srv)
-}
-
-func _Channelz_GetTopChannels_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetTopChannelsRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetTopChannels(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetTopChannels",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetTopChannels(ctx, req.(*GetTopChannelsRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Channelz_GetServers_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetServersRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetServers(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetServers",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetServers(ctx, req.(*GetServersRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Channelz_GetServer_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetServerRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetServer(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetServer",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetServer(ctx, req.(*GetServerRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Channelz_GetServerSockets_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetServerSocketsRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetServerSockets(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetServerSockets",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetServerSockets(ctx, req.(*GetServerSocketsRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Channelz_GetChannel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetChannelRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetChannel(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetChannel",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetChannel(ctx, req.(*GetChannelRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Channelz_GetSubchannel_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetSubchannelRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetSubchannel(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetSubchannel",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetSubchannel(ctx, req.(*GetSubchannelRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Channelz_GetSocket_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetSocketRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ChannelzServer).GetSocket(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.channelz.v1.Channelz/GetSocket",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ChannelzServer).GetSocket(ctx, req.(*GetSocketRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-var _Channelz_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.channelz.v1.Channelz",
-	HandlerType: (*ChannelzServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "GetTopChannels",
-			Handler:    _Channelz_GetTopChannels_Handler,
-		},
-		{
-			MethodName: "GetServers",
-			Handler:    _Channelz_GetServers_Handler,
-		},
-		{
-			MethodName: "GetServer",
-			Handler:    _Channelz_GetServer_Handler,
-		},
-		{
-			MethodName: "GetServerSockets",
-			Handler:    _Channelz_GetServerSockets_Handler,
-		},
-		{
-			MethodName: "GetChannel",
-			Handler:    _Channelz_GetChannel_Handler,
-		},
-		{
-			MethodName: "GetSubchannel",
-			Handler:    _Channelz_GetSubchannel_Handler,
-		},
-		{
-			MethodName: "GetSocket",
-			Handler:    _Channelz_GetSocket_Handler,
-		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "grpc/channelz/v1/channelz.proto",
-}

cmd/protoc-gen-go-grpc/README.md

@@ -4,18 +4,140 @@ This tool generates Go language bindings of `service`s in protobuf definition
 files for gRPC.  For usage information, please see our [quick start
 guide](https://grpc.io/docs/languages/go/quickstart/).
 
-## Future-proofing services
+## Service implementation and registration
 
-By default, to register services using the methods generated by this tool, the
-service implementations must embed the corresponding
-`Unimplemented<ServiceName>Server` for future compatibility.  This is a behavior
-change from the grpc code generator previously included with `protoc-gen-go`.
-To restore this behavior, set the option `requireUnimplementedServers=false`.
-E.g.:
+**NOTE:** service registration has changed from the previous version of the
+code generator.  Please read this section carefully if you are migrating.
 
-```
-  protoc --go-grpc_out=requireUnimplementedServers=false[,other options...]:. \
+To register your service handlers with a gRPC server, first implement the
+methods as either functions or methods on a struct.  Examples:
+
+```go
+// As a function:
+
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+     // Echo.UnaryEcho implementation
+}
+
+// As a struct + method:
+
+type myEchoService struct {
+     // ...fields used by this service...
+}
+
+func (s *myEchoService) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+     // Echo.UnaryEcho implementation
+}
 ```
 
-Note that this is not recommended, and the option is only provided to restore
-backward compatibility with previously-generated code.
+Then create an instance of the generated `Service` struct type and initialize
+the handlers which have been implemented:
+
+```go
+func main() {
+     // ...
+
+     // As a function:
+     echoService := pb.EchoService{
+          UnaryEcho: unaryEcho,
+          // etc
+     }
+
+     // As a struct+method:
+     mes := &myEchoService{...}
+     echoService := pb.EchoService{
+          UnaryEcho: mes.UnaryEcho,
+          // etc
+     }
+
+     // ...
+ }
+```
+
+Finally, pass this `Service` instance to the generated `Register` function:
+
+```go
+     pb.RegisterEchoService(grpcServer, echoService)
+```
+
+### Migration from legacy version
+
+#### Updating existing code
+
+The previous version of protoc-gen-go-grpc used a different method to register
+services.  In that version, it was only possible to register a service
+implementation that was a complete implementation of the service.  It was also
+possible to embed an `Unimplemented` implementation of the service, which was
+also generated and returned an UNIMPLEMENTED status for all methods.  To make
+it easier to migrate from the previous version, two new symbols are generated:
+`New<Service>Service` and `Unstable<Service>Service`.
+
+`New<Service>Service` allows for easy wrapping of a service implementation into
+an instance of the new generated `Service` struct type.  *This has drawbacks,
+however: `New<Service>Service` accepts any parameter, and does not panic or
+error if any methods are missing, are misspelled, or have the wrong signature.*
+These methods will return an UNIMPLEMENTED status if called by a client.
+
+`Unstable<Service>Service` allows for asserting that a type properly implements
+all methods of a service.  It is generated with the name `Unstable` to denote
+that it will be extended whenever new methods are added to the service
+definition.  This kind of change to the service definition is considered
+backward-compatible in protobuf, but is not backward-compatible in Go, because
+adding methods to an interface invalidates any existing implementations.  *Use
+of this symbol could result in future compilation errors.*
+
+To convert your existing code using the previous code generator, please refer
+to the following example:
+
+```go
+type myEchoService{
+     // ...fields used by this service...
+}
+// ... method handler implementation ...
+
+
+// Optional; not recommended: to guarantee myEchoService fully implements
+// EchoService:
+var _ pb.UnstableEchoService = &myEchoService{}
+
+func main() {
+     // ...
+
+     // OLD:
+     pb.RegisterEchoServer(grpcServer, &myEchoService{})
+
+     // NEW:
+     pb.RegisterEchoService(grpcServer, pb.NewEchoService(&myEchoService{}))
+
+
+     // Optional: to gracefully detect missing methods:
+     if _, ok := &myEchoService{}.(pb.UnstableEchoService); !ok {
+        fmt.Println("myEchoService does not implement all methods of EchoService.")
+     }
+
+
+     // ...
+}
+```
+
+#### Updating generated code to support both legacy and new code
+
+`protoc-gen-go-grpc` supports a flag, `migration_mode`, which enables it to be
+run in tandem with the previous tool (`protoc-gen-go` with the grpc plugin).
+It can be used as follows:
+
+```sh
+go install github.com/golang/protobuf/protoc-gen-go
+
+# Example 1: with OPTS set to common options for protoc-gen-go and
+# protoc-gen-go-grpc
+protoc --go_out=${OPTS},plugins=grpc:. --go-grpc_out=${OPTS},migration_mode=true:. *.proto
+
+# Example 2: if no special options are needed
+protoc --go_out=plugins=grpc:. --go-grpc_out=migration_mode=true:. *.proto
+```
+
+This is recommended for temporary use only to ease migration from the legacy
+version.  The `Register<Service>Server` and `<Service>Server` symbols it
+produced are not backward compatible in the presence of newly added methods to
+a service.

cmd/protoc-gen-go-grpc/grpc.go

@@ -58,14 +58,19 @@ func generateFileContent(gen *protogen.Plugin, file *protogen.File, g *protogen.
 
 	g.P("// This is a compile-time assertion to ensure that this generated file")
 	g.P("// is compatible with the grpc package it is being compiled against.")
-	g.P("const _ = ", grpcPackage.Ident("SupportPackageIsVersion6"))
+	g.P("const _ = ", grpcPackage.Ident("SupportPackageIsVersion7"))
 	g.P()
 	for _, service := range file.Services {
+		genClient(gen, file, g, service)
 		genService(gen, file, g, service)
+		genUnstableServiceInterface(gen, file, g, service)
 	}
 }
 
-func genService(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, service *protogen.Service) {
+func genClient(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, service *protogen.Service) {
+	if *migrationMode {
+		return
+	}
 	clientName := service.GoName + "Client"
 
 	g.P("// ", clientName, " is the client API for ", service.GoName, " service.")
@@ -105,121 +110,10 @@ func genService(gen *protogen.Plugin, file *protogen.File, g *protogen.Generated
 	g.P("}")
 	g.P()
 
-	var methodIndex, streamIndex int
 	// Client method implementations.
 	for _, method := range service.Methods {
-		if !method.Desc.IsStreamingServer() && !method.Desc.IsStreamingClient() {
-			// Unary RPC method
-			genClientMethod(gen, file, g, method, methodIndex)
-			methodIndex++
-		} else {
-			// Streaming RPC method
-			genClientMethod(gen, file, g, method, streamIndex)
-			streamIndex++
-		}
+		genClientMethod(gen, g, method)
 	}
-
-	mustOrShould := "must"
-	if !*requireUnimplemented {
-		mustOrShould = "should"
-	}
-
-	// Server interface.
-	serverType := service.GoName + "Server"
-	g.P("// ", serverType, " is the server API for ", service.GoName, " service.")
-	g.P("// All implementations ", mustOrShould, " embed Unimplemented", serverType)
-	g.P("// for forward compatibility")
-	if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
-		g.P("//")
-		g.P(deprecationComment)
-	}
-	g.Annotate(serverType, service.Location)
-	g.P("type ", serverType, " interface {")
-	for _, method := range service.Methods {
-		g.Annotate(serverType+"."+method.GoName, method.Location)
-		if method.Desc.Options().(*descriptorpb.MethodOptions).GetDeprecated() {
-			g.P(deprecationComment)
-		}
-		g.P(method.Comments.Leading,
-			serverSignature(g, method))
-	}
-	if *requireUnimplemented {
-		g.P("mustEmbedUnimplemented", serverType, "()")
-	}
-	g.P("}")
-	g.P()
-
-	// Server Unimplemented struct for forward compatibility.
-	g.P("// Unimplemented", serverType, " ", mustOrShould, " be embedded to have forward compatible implementations.")
-	g.P("type Unimplemented", serverType, " struct {")
-	g.P("}")
-	g.P()
-	for _, method := range service.Methods {
-		nilArg := ""
-		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
-			nilArg = "nil,"
-		}
-		g.P("func (*Unimplemented", serverType, ") ", serverSignature(g, method), "{")
-		g.P("return ", nilArg, statusPackage.Ident("Errorf"), "(", codesPackage.Ident("Unimplemented"), `, "method `, method.GoName, ` not implemented")`)
-		g.P("}")
-	}
-	if *requireUnimplemented {
-		g.P("func (*Unimplemented", serverType, ") mustEmbedUnimplemented", serverType, "() {}")
-	}
-	g.P()
-
-	// Server registration.
-	if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
-		g.P(deprecationComment)
-	}
-	serviceDescVar := "_" + service.GoName + "_serviceDesc"
-	g.P("func Register", service.GoName, "Server(s *", grpcPackage.Ident("Server"), ", srv ", serverType, ") {")
-	g.P("s.RegisterService(&", serviceDescVar, `, srv)`)
-	g.P("}")
-	g.P()
-
-	// Server handler implementations.
-	var handlerNames []string
-	for _, method := range service.Methods {
-		hname := genServerMethod(gen, file, g, method)
-		handlerNames = append(handlerNames, hname)
-	}
-
-	// Service descriptor.
-	g.P("var ", serviceDescVar, " = ", grpcPackage.Ident("ServiceDesc"), " {")
-	g.P("ServiceName: ", strconv.Quote(string(service.Desc.FullName())), ",")
-	g.P("HandlerType: (*", serverType, ")(nil),")
-	g.P("Methods: []", grpcPackage.Ident("MethodDesc"), "{")
-	for i, method := range service.Methods {
-		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
-			continue
-		}
-		g.P("{")
-		g.P("MethodName: ", strconv.Quote(string(method.Desc.Name())), ",")
-		g.P("Handler: ", handlerNames[i], ",")
-		g.P("},")
-	}
-	g.P("},")
-	g.P("Streams: []", grpcPackage.Ident("StreamDesc"), "{")
-	for i, method := range service.Methods {
-		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
-			continue
-		}
-		g.P("{")
-		g.P("StreamName: ", strconv.Quote(string(method.Desc.Name())), ",")
-		g.P("Handler: ", handlerNames[i], ",")
-		if method.Desc.IsStreamingServer() {
-			g.P("ServerStreams: true,")
-		}
-		if method.Desc.IsStreamingClient() {
-			g.P("ClientStreams: true,")
-		}
-		g.P("},")
-	}
-	g.P("},")
-	g.P("Metadata: \"", file.Desc.Path(), "\",")
-	g.P("}")
-	g.P()
 }
 
 func clientSignature(g *protogen.GeneratedFile, method *protogen.Method) string {
@@ -237,13 +131,25 @@ func clientSignature(g *protogen.GeneratedFile, method *protogen.Method) string
 	return s
 }
 
-func genClientMethod(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, method *protogen.Method, index int) {
+func genClientMethod(gen *protogen.Plugin, g *protogen.GeneratedFile, method *protogen.Method) {
 	service := method.Parent
 	sname := fmt.Sprintf("/%s/%s", service.Desc.FullName(), method.Desc.Name())
 
 	if method.Desc.Options().(*descriptorpb.MethodOptions).GetDeprecated() {
 		g.P(deprecationComment)
 	}
+
+	streamDescName := unexport(service.GoName) + method.GoName + "StreamDesc"
+	g.P("var ", streamDescName, " = &", grpcPackage.Ident("StreamDesc"), "{")
+	g.P("StreamName: ", strconv.Quote(string(method.Desc.Name())), ",")
+	if method.Desc.IsStreamingServer() {
+		g.P("ServerStreams: true,")
+	}
+	if method.Desc.IsStreamingClient() {
+		g.P("ClientStreams: true,")
+	}
+	g.P("}")
+
 	g.P("func (c *", unexport(service.GoName), "Client) ", clientSignature(g, method), "{")
 	if !method.Desc.IsStreamingServer() && !method.Desc.IsStreamingClient() {
 		g.P("out := new(", method.Output.GoIdent, ")")
@@ -255,8 +161,8 @@ func genClientMethod(gen *protogen.Plugin, file *protogen.File, g *protogen.Gene
 		return
 	}
 	streamType := unexport(service.GoName) + method.GoName + "Client"
-	serviceDescVar := "_" + service.GoName + "_serviceDesc"
-	g.P("stream, err := c.cc.NewStream(ctx, &", serviceDescVar, ".Streams[", index, `], "`, sname, `", opts...)`)
+
+	g.P(`stream, err := c.cc.NewStream(ctx, `, streamDescName, `, "`, sname, `", opts...)`)
 	g.P("if err != nil { return nil, err }")
 	g.P("x := &", streamType, "{stream}")
 	if !method.Desc.IsStreamingClient() {
@@ -316,7 +222,140 @@ func genClientMethod(gen *protogen.Plugin, file *protogen.File, g *protogen.Gene
 	}
 }
 
-func serverSignature(g *protogen.GeneratedFile, method *protogen.Method) string {
+func genService(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, service *protogen.Service) {
+	// Server struct.
+	serviceType := service.GoName + "Service"
+	g.P("// ", serviceType, " is the service API for ", service.GoName, " service.")
+	g.P("// Fields should be assigned to their respective handler implementations only before")
+	g.P("// Register", serviceType, " is called.  Any unassigned fields will result in the")
+	g.P("// handler for that method returning an Unimplemented error.")
+	if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
+		g.P("//")
+		g.P(deprecationComment)
+	}
+	g.Annotate(serviceType, service.Location)
+	g.P("type ", serviceType, " struct {")
+	for _, method := range service.Methods {
+		if method.Desc.Options().(*descriptorpb.MethodOptions).GetDeprecated() {
+			g.P(deprecationComment)
+		}
+		g.Annotate(serviceType+"."+method.GoName, method.Location)
+		g.P(method.Comments.Leading,
+			handlerSignature(g, method))
+	}
+	g.P("}")
+	g.P()
+
+	// Method handler implementations.
+	for _, method := range service.Methods {
+		genMethodHandler(gen, g, method)
+	}
+
+	// Stream interfaces and implementations.
+	for _, method := range service.Methods {
+		genServerStreamTypes(gen, g, method)
+	}
+
+	// Service registration.
+	genRegisterFunction(gen, file, g, service)
+
+	// Short-cut service constructor.
+	genServiceConstructor(gen, g, service)
+}
+
+func genRegisterFunction(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, service *protogen.Service) {
+	g.P("// Register", service.GoName, "Service registers a service implementation with a gRPC server.")
+	if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
+		g.P("//")
+		g.P(deprecationComment)
+	}
+	g.P("func Register", service.GoName, "Service(s ", grpcPackage.Ident("ServiceRegistrar"), ", srv *", service.GoName, "Service) {")
+
+	// Service descriptor.
+	g.P("sd := ", grpcPackage.Ident("ServiceDesc"), " {")
+	g.P("ServiceName: ", strconv.Quote(string(service.Desc.FullName())), ",")
+	g.P("Methods: []", grpcPackage.Ident("MethodDesc"), "{")
+	for _, method := range service.Methods {
+		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
+			continue
+		}
+		g.P("{")
+		g.P("MethodName: ", strconv.Quote(string(method.Desc.Name())), ",")
+		g.P("Handler: srv.", unexport(method.GoName), ",")
+		g.P("},")
+	}
+	g.P("},")
+	g.P("Streams: []", grpcPackage.Ident("StreamDesc"), "{")
+	for _, method := range service.Methods {
+		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
+			continue
+		}
+		g.P("{")
+		g.P("StreamName: ", strconv.Quote(string(method.Desc.Name())), ",")
+		g.P("Handler: srv.", unexport(method.GoName), ",")
+		if method.Desc.IsStreamingServer() {
+			g.P("ServerStreams: true,")
+		}
+		if method.Desc.IsStreamingClient() {
+			g.P("ClientStreams: true,")
+		}
+		g.P("},")
+	}
+	g.P("},")
+	g.P("Metadata: \"", file.Desc.Path(), "\",")
+	g.P("}")
+	g.P()
+
+	g.P("s.RegisterService(&sd, nil)")
+	g.P("}")
+	g.P()
+}
+
+func genServiceConstructor(gen *protogen.Plugin, g *protogen.GeneratedFile, service *protogen.Service) {
+	g.P("// New", service.GoName, "Service creates a new ", service.GoName, "Service containing the")
+	g.P("// implemented methods of the ", service.GoName, " service in s.  Any unimplemented")
+	g.P("// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.")
+	g.P("// This includes situations where the method handler is misspelled or has the wrong")
+	g.P("// signature.  For this reason, this function should be used with great care and")
+	g.P("// is not recommended to be used by most users.")
+	g.P("func New", service.GoName, "Service(s interface{}) *", service.GoName, "Service {")
+	g.P("ns := &", service.GoName, "Service{}")
+	for _, method := range service.Methods {
+		g.P("if h, ok := s.(interface {", methodSignature(g, method), "}); ok {")
+		g.P("ns.", method.GoName, " = h.", method.GoName)
+		g.P("}")
+	}
+	g.P("return ns")
+	g.P("}")
+	g.P()
+}
+
+func genUnstableServiceInterface(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, service *protogen.Service) {
+	// Service interface.
+	serviceType := service.GoName + "Service"
+	g.P("// Unstable", serviceType, " is the service API for ", service.GoName, " service.")
+	g.P("// New methods may be added to this interface if they are added to the service")
+	g.P("// definition, which is not a backward-compatible change.  For this reason, ")
+	g.P("// use of this type is not recommended.")
+	if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
+		g.P("//")
+		g.P(deprecationComment)
+	}
+	g.Annotate("Unstable"+serviceType, service.Location)
+	g.P("type Unstable", serviceType, " interface {")
+	for _, method := range service.Methods {
+		g.Annotate("Unstable"+serviceType+"."+method.GoName, method.Location)
+		if method.Desc.Options().(*descriptorpb.MethodOptions).GetDeprecated() {
+			g.P(deprecationComment)
+		}
+		g.P(method.Comments.Leading,
+			methodSignature(g, method))
+	}
+	g.P("}")
+	g.P()
+}
+
+func methodSignature(g *protogen.GeneratedFile, method *protogen.Method) string {
 	var reqArgs []string
 	ret := "error"
 	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
@@ -332,39 +371,88 @@ func serverSignature(g *protogen.GeneratedFile, method *protogen.Method) string
 	return method.GoName + "(" + strings.Join(reqArgs, ", ") + ") " + ret
 }
 
-func genServerMethod(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, method *protogen.Method) string {
-	service := method.Parent
-	hname := fmt.Sprintf("_%s_%s_Handler", service.GoName, method.GoName)
-
+func handlerSignature(g *protogen.GeneratedFile, method *protogen.Method) string {
+	var reqArgs []string
+	ret := "error"
+	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
+		reqArgs = append(reqArgs, g.QualifiedGoIdent(contextPackage.Ident("Context")))
+		ret = "(*" + g.QualifiedGoIdent(method.Output.GoIdent) + ", error)"
+	}
+	if !method.Desc.IsStreamingClient() {
+		reqArgs = append(reqArgs, "*"+g.QualifiedGoIdent(method.Input.GoIdent))
+	}
+	if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
+		reqArgs = append(reqArgs, method.Parent.GoName+"_"+method.GoName+"Server")
+	}
+	return method.GoName + " func(" + strings.Join(reqArgs, ", ") + ") " + ret
+}
+
+func unaryHandlerSignature(g *protogen.GeneratedFile) string {
+	return "(_ interface{}, ctx " + g.QualifiedGoIdent(contextPackage.Ident("Context")) +
+		", dec func(interface{}) error, interceptor " + g.QualifiedGoIdent(grpcPackage.Ident("UnaryServerInterceptor")) + ") (interface{}, error)"
+}
+
+func streamHandlerSignature(g *protogen.GeneratedFile) string {
+	return "(_ interface{}, stream " + g.QualifiedGoIdent(grpcPackage.Ident("ServerStream")) + ") error"
+}
+
+func genMethodHandler(gen *protogen.Plugin, g *protogen.GeneratedFile, method *protogen.Method) {
+	service := method.Parent
+
+	nilArg := ""
+	signature := streamHandlerSignature(g)
+	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
+		nilArg = "nil,"
+		signature = unaryHandlerSignature(g)
+	}
+	g.P("func (s *", service.GoName, "Service) ", unexport(method.GoName), signature, " {")
+
+	g.P("if s.", method.GoName, " == nil {")
+	g.P("return ", nilArg, statusPackage.Ident("Errorf"), "(", codesPackage.Ident("Unimplemented"), `, "method `, method.GoName, ` not implemented")`)
+	g.P("}")
+	genHandlerBody(gen, g, method)
+
+	g.P("}")
+}
+
+func genHandlerBody(gen *protogen.Plugin, g *protogen.GeneratedFile, method *protogen.Method) {
+	service := method.Parent
 	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
-		g.P("func ", hname, "(srv interface{}, ctx ", contextPackage.Ident("Context"), ", dec func(interface{}) error, interceptor ", grpcPackage.Ident("UnaryServerInterceptor"), ") (interface{}, error) {")
 		g.P("in := new(", method.Input.GoIdent, ")")
 		g.P("if err := dec(in); err != nil { return nil, err }")
-		g.P("if interceptor == nil { return srv.(", service.GoName, "Server).", method.GoName, "(ctx, in) }")
+		g.P("if interceptor == nil { return s.", method.GoName, "(ctx, in) }")
 		g.P("info := &", grpcPackage.Ident("UnaryServerInfo"), "{")
-		g.P("Server: srv,")
+		g.P("Server: s,")
 		g.P("FullMethod: ", strconv.Quote(fmt.Sprintf("/%s/%s", service.Desc.FullName(), method.GoName)), ",")
 		g.P("}")
 		g.P("handler := func(ctx ", contextPackage.Ident("Context"), ", req interface{}) (interface{}, error) {")
-		g.P("return srv.(", service.GoName, "Server).", method.GoName, "(ctx, req.(*", method.Input.GoIdent, "))")
+		g.P("return s.", method.GoName, "(ctx, req.(*", method.Input.GoIdent, "))")
 		g.P("}")
 		g.P("return interceptor(ctx, in, info, handler)")
-		g.P("}")
-		g.P()
-		return hname
+		return
 	}
 	streamType := unexport(service.GoName) + method.GoName + "Server"
-	g.P("func ", hname, "(srv interface{}, stream ", grpcPackage.Ident("ServerStream"), ") error {")
 	if !method.Desc.IsStreamingClient() {
+		// Server-streaming
 		g.P("m := new(", method.Input.GoIdent, ")")
 		g.P("if err := stream.RecvMsg(m); err != nil { return err }")
-		g.P("return srv.(", service.GoName, "Server).", method.GoName, "(m, &", streamType, "{stream})")
+		g.P("return s.", method.GoName, "(m, &", streamType, "{stream})")
 	} else {
-		g.P("return srv.(", service.GoName, "Server).", method.GoName, "(&", streamType, "{stream})")
+		// Bidi-streaming
+		g.P("return s.", method.GoName, "(&", streamType, "{stream})")
 	}
-	g.P("}")
-	g.P()
+}
 
+func genServerStreamTypes(gen *protogen.Plugin, g *protogen.GeneratedFile, method *protogen.Method) {
+	if *migrationMode {
+		return
+	}
+	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
+		// Unary method
+		return
+	}
+	service := method.Parent
+	streamType := unexport(service.GoName) + method.GoName + "Server"
 	genSend := method.Desc.IsStreamingServer()
 	genSendAndClose := !method.Desc.IsStreamingServer()
 	genRecv := method.Desc.IsStreamingClient()
@@ -410,7 +498,7 @@ func genServerMethod(gen *protogen.Plugin, file *protogen.File, g *protogen.Gene
 		g.P()
 	}
 
-	return hname
+	return
 }
 
 const deprecationComment = "// Deprecated: Do not use."

cmd/protoc-gen-go-grpc/main.go

@@ -37,11 +37,11 @@ import (
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
-var requireUnimplemented *bool
+var migrationMode *bool
 
 func main() {
 	var flags flag.FlagSet
-	requireUnimplemented = flags.Bool("requireUnimplementedServers", true, "unset to match legacy behavior")
+	migrationMode = flags.Bool("migration_mode", false, "set to generate new symbols only; requires symbols produced by legacy protoc-gen-go")
 
 	protogen.Options{
 		ParamFunc: flags.Set,

credentials/alts/internal/proto/grpc_gcp/handshaker.pb.go

@@ -4,8 +4,12 @@
 package grpc_gcp
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -975,3 +979,127 @@ var fileDescriptor_54c074f40c7c7e99 = []byte{
 	0x5f, 0xef, 0xa8, 0xf5, 0x83, 0x7f, 0x02, 0x00, 0x00, 0xff, 0xff, 0xc1, 0xf9, 0x9d, 0xf2, 0xd9,
 	0x0b, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// HandshakerServiceClient is the client API for HandshakerService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type HandshakerServiceClient interface {
+	// Handshaker service accepts a stream of handshaker request, returning a
+	// stream of handshaker response. Client is expected to send exactly one
+	// message with either client_start or server_start followed by one or more
+	// messages with next. Each time client sends a request, the handshaker
+	// service expects to respond. Client does not have to wait for service's
+	// response before sending next request.
+	DoHandshake(ctx context.Context, opts ...grpc.CallOption) (HandshakerService_DoHandshakeClient, error)
+}
+
+type handshakerServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewHandshakerServiceClient(cc grpc.ClientConnInterface) HandshakerServiceClient {
+	return &handshakerServiceClient{cc}
+}
+
+func (c *handshakerServiceClient) DoHandshake(ctx context.Context, opts ...grpc.CallOption) (HandshakerService_DoHandshakeClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_HandshakerService_serviceDesc.Streams[0], "/grpc.gcp.HandshakerService/DoHandshake", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &handshakerServiceDoHandshakeClient{stream}
+	return x, nil
+}
+
+type HandshakerService_DoHandshakeClient interface {
+	Send(*HandshakerReq) error
+	Recv() (*HandshakerResp, error)
+	grpc.ClientStream
+}
+
+type handshakerServiceDoHandshakeClient struct {
+	grpc.ClientStream
+}
+
+func (x *handshakerServiceDoHandshakeClient) Send(m *HandshakerReq) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *handshakerServiceDoHandshakeClient) Recv() (*HandshakerResp, error) {
+	m := new(HandshakerResp)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// HandshakerServiceServer is the server API for HandshakerService service.
+type HandshakerServiceServer interface {
+	// Handshaker service accepts a stream of handshaker request, returning a
+	// stream of handshaker response. Client is expected to send exactly one
+	// message with either client_start or server_start followed by one or more
+	// messages with next. Each time client sends a request, the handshaker
+	// service expects to respond. Client does not have to wait for service's
+	// response before sending next request.
+	DoHandshake(HandshakerService_DoHandshakeServer) error
+}
+
+// UnimplementedHandshakerServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedHandshakerServiceServer struct {
+}
+
+func (*UnimplementedHandshakerServiceServer) DoHandshake(srv HandshakerService_DoHandshakeServer) error {
+	return status.Errorf(codes.Unimplemented, "method DoHandshake not implemented")
+}
+
+func RegisterHandshakerServiceServer(s *grpc.Server, srv HandshakerServiceServer) {
+	s.RegisterService(&_HandshakerService_serviceDesc, srv)
+}
+
+func _HandshakerService_DoHandshake_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(HandshakerServiceServer).DoHandshake(&handshakerServiceDoHandshakeServer{stream})
+}
+
+type HandshakerService_DoHandshakeServer interface {
+	Send(*HandshakerResp) error
+	Recv() (*HandshakerReq, error)
+	grpc.ServerStream
+}
+
+type handshakerServiceDoHandshakeServer struct {
+	grpc.ServerStream
+}
+
+func (x *handshakerServiceDoHandshakeServer) Send(m *HandshakerResp) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *handshakerServiceDoHandshakeServer) Recv() (*HandshakerReq, error) {
+	m := new(HandshakerReq)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _HandshakerService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.gcp.HandshakerService",
+	HandlerType: (*HandshakerServiceServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "DoHandshake",
+			Handler:       _HandshakerService_DoHandshake_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "grpc/gcp/handshaker.proto",
+}

credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go

@@ -3,7 +3,6 @@
 package grpc_gcp
 
 import (
-	context "context"
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
@@ -11,64 +10,69 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// HandshakerServiceClient is the client API for HandshakerService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type HandshakerServiceClient interface {
+// HandshakerServiceService is the service API for HandshakerService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterHandshakerServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type HandshakerServiceService struct {
 	// Handshaker service accepts a stream of handshaker request, returning a
 	// stream of handshaker response. Client is expected to send exactly one
 	// message with either client_start or server_start followed by one or more
 	// messages with next. Each time client sends a request, the handshaker
 	// service expects to respond. Client does not have to wait for service's
 	// response before sending next request.
-	DoHandshake(ctx context.Context, opts ...grpc.CallOption) (HandshakerService_DoHandshakeClient, error)
+	DoHandshake func(HandshakerService_DoHandshakeServer) error
 }
 
-type handshakerServiceClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewHandshakerServiceClient(cc grpc.ClientConnInterface) HandshakerServiceClient {
-	return &handshakerServiceClient{cc}
-}
-
-func (c *handshakerServiceClient) DoHandshake(ctx context.Context, opts ...grpc.CallOption) (HandshakerService_DoHandshakeClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_HandshakerService_serviceDesc.Streams[0], "/grpc.gcp.HandshakerService/DoHandshake", opts...)
-	if err != nil {
-		return nil, err
+func (s *HandshakerServiceService) doHandshake(_ interface{}, stream grpc.ServerStream) error {
+	if s.DoHandshake == nil {
+		return status.Errorf(codes.Unimplemented, "method DoHandshake not implemented")
 	}
-	x := &handshakerServiceDoHandshakeClient{stream}
-	return x, nil
+	return s.DoHandshake(&handshakerServiceDoHandshakeServer{stream})
 }
 
-type HandshakerService_DoHandshakeClient interface {
-	Send(*HandshakerReq) error
-	Recv() (*HandshakerResp, error)
-	grpc.ClientStream
-}
-
-type handshakerServiceDoHandshakeClient struct {
-	grpc.ClientStream
-}
-
-func (x *handshakerServiceDoHandshakeClient) Send(m *HandshakerReq) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *handshakerServiceDoHandshakeClient) Recv() (*HandshakerResp, error) {
-	m := new(HandshakerResp)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
+// RegisterHandshakerServiceService registers a service implementation with a gRPC server.
+func RegisterHandshakerServiceService(s grpc.ServiceRegistrar, srv *HandshakerServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.gcp.HandshakerService",
+		Methods:     []grpc.MethodDesc{},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "DoHandshake",
+				Handler:       srv.doHandshake,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+		},
+		Metadata: "grpc/gcp/handshaker.proto",
 	}
-	return m, nil
+
+	s.RegisterService(&sd, nil)
 }
 
-// HandshakerServiceServer is the server API for HandshakerService service.
-// All implementations should embed UnimplementedHandshakerServiceServer
-// for forward compatibility
-type HandshakerServiceServer interface {
+// NewHandshakerServiceService creates a new HandshakerServiceService containing the
+// implemented methods of the HandshakerService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewHandshakerServiceService(s interface{}) *HandshakerServiceService {
+	ns := &HandshakerServiceService{}
+	if h, ok := s.(interface {
+		DoHandshake(HandshakerService_DoHandshakeServer) error
+	}); ok {
+		ns.DoHandshake = h.DoHandshake
+	}
+	return ns
+}
+
+// UnstableHandshakerServiceService is the service API for HandshakerService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableHandshakerServiceService interface {
 	// Handshaker service accepts a stream of handshaker request, returning a
 	// stream of handshaker response. Client is expected to send exactly one
 	// message with either client_start or server_start followed by one or more
@@ -77,56 +81,3 @@ type HandshakerServiceServer interface {
 	// response before sending next request.
 	DoHandshake(HandshakerService_DoHandshakeServer) error
 }
-
-// UnimplementedHandshakerServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedHandshakerServiceServer struct {
-}
-
-func (*UnimplementedHandshakerServiceServer) DoHandshake(HandshakerService_DoHandshakeServer) error {
-	return status.Errorf(codes.Unimplemented, "method DoHandshake not implemented")
-}
-
-func RegisterHandshakerServiceServer(s *grpc.Server, srv HandshakerServiceServer) {
-	s.RegisterService(&_HandshakerService_serviceDesc, srv)
-}
-
-func _HandshakerService_DoHandshake_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(HandshakerServiceServer).DoHandshake(&handshakerServiceDoHandshakeServer{stream})
-}
-
-type HandshakerService_DoHandshakeServer interface {
-	Send(*HandshakerResp) error
-	Recv() (*HandshakerReq, error)
-	grpc.ServerStream
-}
-
-type handshakerServiceDoHandshakeServer struct {
-	grpc.ServerStream
-}
-
-func (x *handshakerServiceDoHandshakeServer) Send(m *HandshakerResp) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *handshakerServiceDoHandshakeServer) Recv() (*HandshakerReq, error) {
-	m := new(HandshakerReq)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _HandshakerService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.gcp.HandshakerService",
-	HandlerType: (*HandshakerServiceServer)(nil),
-	Methods:     []grpc.MethodDesc{},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "DoHandshake",
-			Handler:       _HandshakerService_DoHandshake_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "grpc/gcp/handshaker.proto",
-}

credentials/tls/certprovider/meshca/internal/v1/meshca.pb.go

@@ -4,9 +4,13 @@
 package google_security_meshca_v1
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
 	duration "github.com/golang/protobuf/ptypes/duration"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -153,3 +157,87 @@ var fileDescriptor_f72841047b94fe5e = []byte{
 	0x75, 0x36, 0xec, 0xba, 0x62, 0xee, 0x66, 0x99, 0x93, 0xe5, 0x45, 0xb7, 0xcf, 0xc3, 0x77, 0x00,
 	0x00, 0x00, 0xff, 0xff, 0xb7, 0x0d, 0xfd, 0xff, 0xf7, 0x01, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// MeshCertificateServiceClient is the client API for MeshCertificateService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type MeshCertificateServiceClient interface {
+	// Using provided CSR, returns a signed certificate that represents a GCP
+	// service account identity.
+	CreateCertificate(ctx context.Context, in *MeshCertificateRequest, opts ...grpc.CallOption) (*MeshCertificateResponse, error)
+}
+
+type meshCertificateServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewMeshCertificateServiceClient(cc grpc.ClientConnInterface) MeshCertificateServiceClient {
+	return &meshCertificateServiceClient{cc}
+}
+
+func (c *meshCertificateServiceClient) CreateCertificate(ctx context.Context, in *MeshCertificateRequest, opts ...grpc.CallOption) (*MeshCertificateResponse, error) {
+	out := new(MeshCertificateResponse)
+	err := c.cc.Invoke(ctx, "/google.security.meshca.v1.MeshCertificateService/CreateCertificate", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// MeshCertificateServiceServer is the server API for MeshCertificateService service.
+type MeshCertificateServiceServer interface {
+	// Using provided CSR, returns a signed certificate that represents a GCP
+	// service account identity.
+	CreateCertificate(context.Context, *MeshCertificateRequest) (*MeshCertificateResponse, error)
+}
+
+// UnimplementedMeshCertificateServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedMeshCertificateServiceServer struct {
+}
+
+func (*UnimplementedMeshCertificateServiceServer) CreateCertificate(ctx context.Context, req *MeshCertificateRequest) (*MeshCertificateResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CreateCertificate not implemented")
+}
+
+func RegisterMeshCertificateServiceServer(s *grpc.Server, srv MeshCertificateServiceServer) {
+	s.RegisterService(&_MeshCertificateService_serviceDesc, srv)
+}
+
+func _MeshCertificateService_CreateCertificate_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(MeshCertificateRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MeshCertificateServiceServer).CreateCertificate(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.security.meshca.v1.MeshCertificateService/CreateCertificate",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MeshCertificateServiceServer).CreateCertificate(ctx, req.(*MeshCertificateRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _MeshCertificateService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "google.security.meshca.v1.MeshCertificateService",
+	HandlerType: (*MeshCertificateServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "CreateCertificate",
+			Handler:    _MeshCertificateService_CreateCertificate_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "istio/google/security/meshca/v1/meshca.proto",
+}

credentials/tls/certprovider/meshca/internal/v1/meshca_grpc.pb.go

@@ -11,82 +11,78 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// MeshCertificateServiceClient is the client API for MeshCertificateService service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type MeshCertificateServiceClient interface {
+// MeshCertificateServiceService is the service API for MeshCertificateService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterMeshCertificateServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type MeshCertificateServiceService struct {
 	// Using provided CSR, returns a signed certificate that represents a GCP
 	// service account identity.
-	CreateCertificate(ctx context.Context, in *MeshCertificateRequest, opts ...grpc.CallOption) (*MeshCertificateResponse, error)
+	CreateCertificate func(context.Context, *MeshCertificateRequest) (*MeshCertificateResponse, error)
 }
 
-type meshCertificateServiceClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewMeshCertificateServiceClient(cc grpc.ClientConnInterface) MeshCertificateServiceClient {
-	return &meshCertificateServiceClient{cc}
-}
-
-func (c *meshCertificateServiceClient) CreateCertificate(ctx context.Context, in *MeshCertificateRequest, opts ...grpc.CallOption) (*MeshCertificateResponse, error) {
-	out := new(MeshCertificateResponse)
-	err := c.cc.Invoke(ctx, "/google.security.meshca.v1.MeshCertificateService/CreateCertificate", in, out, opts...)
-	if err != nil {
-		return nil, err
+func (s *MeshCertificateServiceService) createCertificate(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.CreateCertificate == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method CreateCertificate not implemented")
 	}
-	return out, nil
-}
-
-// MeshCertificateServiceServer is the server API for MeshCertificateService service.
-// All implementations should embed UnimplementedMeshCertificateServiceServer
-// for forward compatibility
-type MeshCertificateServiceServer interface {
-	// Using provided CSR, returns a signed certificate that represents a GCP
-	// service account identity.
-	CreateCertificate(context.Context, *MeshCertificateRequest) (*MeshCertificateResponse, error)
-}
-
-// UnimplementedMeshCertificateServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedMeshCertificateServiceServer struct {
-}
-
-func (*UnimplementedMeshCertificateServiceServer) CreateCertificate(context.Context, *MeshCertificateRequest) (*MeshCertificateResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method CreateCertificate not implemented")
-}
-
-func RegisterMeshCertificateServiceServer(s *grpc.Server, srv MeshCertificateServiceServer) {
-	s.RegisterService(&_MeshCertificateService_serviceDesc, srv)
-}
-
-func _MeshCertificateService_CreateCertificate_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(MeshCertificateRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(MeshCertificateServiceServer).CreateCertificate(ctx, in)
+		return s.CreateCertificate(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/google.security.meshca.v1.MeshCertificateService/CreateCertificate",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(MeshCertificateServiceServer).CreateCertificate(ctx, req.(*MeshCertificateRequest))
+		return s.CreateCertificate(ctx, req.(*MeshCertificateRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-var _MeshCertificateService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "google.security.meshca.v1.MeshCertificateService",
-	HandlerType: (*MeshCertificateServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "CreateCertificate",
-			Handler:    _MeshCertificateService_CreateCertificate_Handler,
+// RegisterMeshCertificateServiceService registers a service implementation with a gRPC server.
+func RegisterMeshCertificateServiceService(s grpc.ServiceRegistrar, srv *MeshCertificateServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "google.security.meshca.v1.MeshCertificateService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "CreateCertificate",
+				Handler:    srv.createCertificate,
+			},
 		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "istio/google/security/meshca/v1/meshca.proto",
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "istio/google/security/meshca/v1/meshca.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewMeshCertificateServiceService creates a new MeshCertificateServiceService containing the
+// implemented methods of the MeshCertificateService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewMeshCertificateServiceService(s interface{}) *MeshCertificateServiceService {
+	ns := &MeshCertificateServiceService{}
+	if h, ok := s.(interface {
+		CreateCertificate(context.Context, *MeshCertificateRequest) (*MeshCertificateResponse, error)
+	}); ok {
+		ns.CreateCertificate = h.CreateCertificate
+	}
+	return ns
+}
+
+// UnstableMeshCertificateServiceService is the service API for MeshCertificateService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableMeshCertificateServiceService interface {
+	// Using provided CSR, returns a signed certificate that represents a GCP
+	// service account identity.
+	CreateCertificate(context.Context, *MeshCertificateRequest) (*MeshCertificateResponse, error)
 }

examples/features/authentication/server/main.go

@@ -63,7 +63,7 @@ func main() {
 		grpc.Creds(credentials.NewServerTLSFromCert(&cert)),
 	}
 	s := grpc.NewServer(opts...)
-	pb.RegisterEchoServer(s, &ecServer{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
 	if err != nil {
 		log.Fatalf("failed to listen: %v", err)
@@ -73,11 +73,7 @@ func main() {
 	}
 }
 
-type ecServer struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *ecServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
 	return &pb.EchoResponse{Message: req.Message}, nil
 }
 

examples/features/cancellation/server/main.go

@@ -33,11 +33,7 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
+func bidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
 	for {
 		in, err := stream.Recv()
 		if err != nil {
@@ -61,6 +57,6 @@ func main() {
 	}
 	fmt.Printf("server listening at port %v\n", lis.Addr())
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{BidirectionalStreamingEcho: bidirectionalStreamingEcho})
 	s.Serve(lis)
 }

examples/features/compression/server/main.go

@@ -34,11 +34,7 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) UnaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
 	fmt.Printf("UnaryEcho called with message %q\n", in.GetMessage())
 	return &pb.EchoResponse{Message: in.Message}, nil
 }
@@ -53,6 +49,6 @@ func main() {
 	fmt.Printf("server listening at %v\n", lis.Addr())
 
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 	s.Serve(lis)
 }

examples/features/deadline/server/main.go

@@ -40,7 +40,6 @@ var port = flag.Int("port", 50052, "port number")
 
 // server is used to implement EchoServer.
 type server struct {
-	pb.UnimplementedEchoServer
 	client pb.EchoClient
 	cc     *grpc.ClientConn
 }
@@ -112,9 +111,12 @@ func main() {
 
 	echoServer := newEchoServer()
 	defer echoServer.Close()
-
 	grpcServer := grpc.NewServer()
-	pb.RegisterEchoServer(grpcServer, echoServer)
+
+	pb.RegisterEchoService(grpcServer, &pb.EchoService{
+		UnaryEcho:                  echoServer.UnaryEcho,
+		BidirectionalStreamingEcho: echoServer.BidirectionalStreamingEcho,
+	})
 
 	if err := grpcServer.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/debugging/server/main.go

@@ -36,23 +36,13 @@ var (
 	ports = []string{":10001", ":10002", ":10003"}
 )
 
-// server is used to implement helloworld.GreeterServer.
-type server struct {
-	pb.UnimplementedGreeterServer
-}
-
-// SayHello implements helloworld.GreeterServer
-func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
+// sayHello implements helloworld.GreeterServer.SayHello
+func sayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
 	return &pb.HelloReply{Message: "Hello " + in.Name}, nil
 }
 
-// slow server is used to simulate a server that has a variable delay in its response.
-type slowServer struct {
-	pb.UnimplementedGreeterServer
-}
-
-// SayHello implements helloworld.GreeterServer
-func (s *slowServer) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
+// sayHelloSlow implements helloworld.GreeterServer.SayHello
+func sayHelloSlow(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
 	// Delay 100ms ~ 200ms before replying
 	time.Sleep(time.Duration(100+grpcrand.Intn(100)) * time.Millisecond)
 	return &pb.HelloReply{Message: "Hello " + in.Name}, nil
@@ -70,7 +60,7 @@ func main() {
 	go s.Serve(lis)
 	defer s.Stop()
 
-	/***** Start three GreeterServers(with one of them to be the slowServer). *****/
+	/***** Start three GreeterServers(with one of them to be the slow server). *****/
 	for i := 0; i < 3; i++ {
 		lis, err := net.Listen("tcp", ports[i])
 		if err != nil {
@@ -79,9 +69,9 @@ func main() {
 		defer lis.Close()
 		s := grpc.NewServer()
 		if i == 2 {
-			pb.RegisterGreeterServer(s, &slowServer{})
+			pb.RegisterGreeterService(s, &pb.GreeterService{SayHello: sayHelloSlow})
 		} else {
-			pb.RegisterGreeterServer(s, &server{})
+			pb.RegisterGreeterService(s, &pb.GreeterService{SayHello: sayHello})
 		}
 		go s.Serve(lis)
 	}

examples/features/encryption/ALTS/server/main.go

@@ -34,11 +34,7 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-type ecServer struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *ecServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
 	return &pb.EchoResponse{Message: req.Message}, nil
 }
 
@@ -54,8 +50,8 @@ func main() {
 
 	s := grpc.NewServer(grpc.Creds(altsTC))
 
-	// Register EchoServer on the server.
-	pb.RegisterEchoServer(s, &ecServer{})
+	// Register EchoService on the server.
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/encryption/TLS/server/main.go

@@ -35,11 +35,7 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-type ecServer struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *ecServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
 	return &pb.EchoResponse{Message: req.Message}, nil
 }
 
@@ -60,7 +56,7 @@ func main() {
 	s := grpc.NewServer(grpc.Creds(creds))
 
 	// Register EchoServer on the server.
-	pb.RegisterEchoServer(s, &ecServer{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/errors/server/main.go

@@ -39,7 +39,6 @@ var port = flag.Int("port", 50052, "port number")
 
 // server is used to implement helloworld.GreeterServer.
 type server struct {
-	pb.UnimplementedGreeterServer
 	mu    sync.Mutex
 	count map[string]int
 }
@@ -78,7 +77,8 @@ func main() {
 	}
 
 	s := grpc.NewServer()
-	pb.RegisterGreeterServer(s, &server{count: make(map[string]int)})
+	hw := &server{count: make(map[string]int)}
+	pb.RegisterGreeterService(s, &pb.GreeterService{SayHello: hw.SayHello})
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)
 	}

examples/features/health/server/main.go

@@ -40,18 +40,12 @@ var (
 	system = "" // empty string represents the health of the system
 )
 
-type echoServer struct {
-	pb.UnimplementedEchoServer
-}
-
-func (e *echoServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
 	return &pb.EchoResponse{
 		Message: fmt.Sprintf("hello from localhost:%d", *port),
 	}, nil
 }
 
-var _ pb.EchoServer = &echoServer{}
-
 func main() {
 	flag.Parse()
 
@@ -63,7 +57,7 @@ func main() {
 	s := grpc.NewServer()
 	healthcheck := health.NewServer()
 	healthpb.RegisterHealthServer(s, healthcheck)
-	pb.RegisterEchoServer(s, &echoServer{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 
 	go func() {
 		// asynchronously inspect dependencies and toggle serving status as needed

examples/features/interceptor/server/main.go

@@ -51,16 +51,12 @@ func logger(format string, a ...interface{}) {
 	fmt.Printf("LOG:\t"+format+"\n", a...)
 }
 
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) UnaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
 	fmt.Printf("unary echoing message %q\n", in.Message)
 	return &pb.EchoResponse{Message: in.Message}, nil
 }
 
-func (s *server) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
+func bidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
 	for {
 		in, err := stream.Recv()
 		if err != nil {
@@ -156,8 +152,11 @@ func main() {
 
 	s := grpc.NewServer(grpc.Creds(creds), grpc.UnaryInterceptor(unaryInterceptor), grpc.StreamInterceptor(streamInterceptor))
 
-	// Register EchoServer on the server.
-	pb.RegisterEchoServer(s, &server{})
+	// Register EchoService on the server.
+	pb.RegisterEchoService(s, &pb.EchoService{
+		UnaryEcho:                  unaryEcho,
+		BidirectionalStreamingEcho: bidirectionalStreamingEcho,
+	})
 
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/keepalive/server/main.go

@@ -48,12 +48,7 @@ var kasp = keepalive.ServerParameters{
 	Timeout:               1 * time.Second,  // Wait 1 second for the ping ack before assuming the connection is dead
 }
 
-// server implements EchoServer.
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
 	return &pb.EchoResponse{Message: req.Message}, nil
 }
 
@@ -67,7 +62,7 @@ func main() {
 	}
 
 	s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp))
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/load_balancing/server/main.go

@@ -36,7 +36,6 @@ var (
 )
 
 type ecServer struct {
-	pb.UnimplementedEchoServer
 	addr string
 }
 
@@ -50,7 +49,8 @@ func startServer(addr string) {
 		log.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &ecServer{addr: addr})
+	e := &ecServer{addr: addr}
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: e.UnaryEcho})
 	log.Printf("serving on %s\n", addr)
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/metadata/server/main.go

@@ -44,11 +44,7 @@ const (
 	streamingCount  = 10
 )
 
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) UnaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
 	fmt.Printf("--- UnaryEcho ---\n")
 	// Create trailer in defer to record function return time.
 	defer func() {
@@ -77,7 +73,7 @@ func (s *server) UnaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoRes
 	return &pb.EchoResponse{Message: in.Message}, nil
 }
 
-func (s *server) ServerStreamingEcho(in *pb.EchoRequest, stream pb.Echo_ServerStreamingEchoServer) error {
+func serverStreamingEcho(in *pb.EchoRequest, stream pb.Echo_ServerStreamingEchoServer) error {
 	fmt.Printf("--- ServerStreamingEcho ---\n")
 	// Create trailer in defer to record function return time.
 	defer func() {
@@ -114,7 +110,7 @@ func (s *server) ServerStreamingEcho(in *pb.EchoRequest, stream pb.Echo_ServerSt
 	return nil
 }
 
-func (s *server) ClientStreamingEcho(stream pb.Echo_ClientStreamingEchoServer) error {
+func clientStreamingEcho(stream pb.Echo_ClientStreamingEchoServer) error {
 	fmt.Printf("--- ClientStreamingEcho ---\n")
 	// Create trailer in defer to record function return time.
 	defer func() {
@@ -154,7 +150,7 @@ func (s *server) ClientStreamingEcho(stream pb.Echo_ClientStreamingEchoServer) e
 	}
 }
 
-func (s *server) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
+func bidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
 	fmt.Printf("--- BidirectionalStreamingEcho ---\n")
 	// Create trailer in defer to record function return time.
 	defer func() {
@@ -205,6 +201,11 @@ func main() {
 	fmt.Printf("server listening at %v\n", lis.Addr())
 
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{
+		UnaryEcho:                  unaryEcho,
+		ServerStreamingEcho:        serverStreamingEcho,
+		ClientStreamingEcho:        clientStreamingEcho,
+		BidirectionalStreamingEcho: bidirectionalStreamingEcho,
+	})
 	s.Serve(lis)
 }

examples/features/multiplex/server/main.go

@@ -34,21 +34,13 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-// hwServer is used to implement helloworld.GreeterServer.
-type hwServer struct {
-	hwpb.UnimplementedGreeterServer
-}
-
-// SayHello implements helloworld.GreeterServer
-func (s *hwServer) SayHello(ctx context.Context, in *hwpb.HelloRequest) (*hwpb.HelloReply, error) {
+// sayHello implements helloworld.GreeterServer.SayHello
+func sayHello(ctx context.Context, in *hwpb.HelloRequest) (*hwpb.HelloReply, error) {
 	return &hwpb.HelloReply{Message: "Hello " + in.Name}, nil
 }
 
-type ecServer struct {
-	ecpb.UnimplementedEchoServer
-}
-
-func (s *ecServer) UnaryEcho(ctx context.Context, req *ecpb.EchoRequest) (*ecpb.EchoResponse, error) {
+// unaryEcho implements echo.Echo.UnaryEcho
+func unaryEcho(ctx context.Context, req *ecpb.EchoRequest) (*ecpb.EchoResponse, error) {
 	return &ecpb.EchoResponse{Message: req.Message}, nil
 }
 
@@ -63,10 +55,10 @@ func main() {
 	s := grpc.NewServer()
 
 	// Register Greeter on the server.
-	hwpb.RegisterGreeterServer(s, &hwServer{})
+	hwpb.RegisterGreeterService(s, &hwpb.GreeterService{SayHello: sayHello})
 
-	// Register RouteGuide on the same server.
-	ecpb.RegisterEchoServer(s, &ecServer{})
+	// Register Echo on the same server.
+	ecpb.RegisterEchoService(s, &ecpb.EchoService{UnaryEcho: unaryEcho})
 
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/name_resolving/server/main.go

@@ -32,13 +32,8 @@ import (
 
 const addr = "localhost:50051"
 
-type ecServer struct {
-	pb.UnimplementedEchoServer
-	addr string
-}
-
-func (s *ecServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
-	return &pb.EchoResponse{Message: fmt.Sprintf("%s (from %s)", req.Message, s.addr)}, nil
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+	return &pb.EchoResponse{Message: fmt.Sprintf("%s (from %s)", req.Message, addr)}, nil
 }
 
 func main() {
@@ -47,7 +42,7 @@ func main() {
 		log.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &ecServer{addr: addr})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 	log.Printf("serving on %s\n", addr)
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/profiling/README.md

@@ -41,7 +41,7 @@ type server struct{}
 
 func main() error {
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{...})
 
 	// Include this to register a profiling-specific service within your server.
 	if err := profsvc.Init(&profsvc.ProfilingConfig{Server: s}); err != nil {

examples/features/profiling/server/main.go

@@ -33,11 +33,7 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) UnaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
 	fmt.Printf("UnaryEcho called with message %q\n", in.GetMessage())
 	return &pb.EchoResponse{Message: in.Message}, nil
 }
@@ -52,7 +48,7 @@ func main() {
 	fmt.Printf("server listening at %v\n", lis.Addr())
 
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 
 	// Register your grpc.Server with profiling.
 	pc := &profsvc.ProfilingConfig{

examples/features/proto/echo/echo_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // EchoClient is the client API for Echo service.
 //
@@ -35,6 +35,10 @@ func NewEchoClient(cc grpc.ClientConnInterface) EchoClient {
 	return &echoClient{cc}
 }
 
+var echoUnaryEchoStreamDesc = &grpc.StreamDesc{
+	StreamName: "UnaryEcho",
+}
+
 func (c *echoClient) UnaryEcho(ctx context.Context, in *EchoRequest, opts ...grpc.CallOption) (*EchoResponse, error) {
 	out := new(EchoResponse)
 	err := c.cc.Invoke(ctx, "/grpc.examples.echo.Echo/UnaryEcho", in, out, opts...)
@@ -44,8 +48,13 @@ func (c *echoClient) UnaryEcho(ctx context.Context, in *EchoRequest, opts ...grp
 	return out, nil
 }
 
+var echoServerStreamingEchoStreamDesc = &grpc.StreamDesc{
+	StreamName:    "ServerStreamingEcho",
+	ServerStreams: true,
+}
+
 func (c *echoClient) ServerStreamingEcho(ctx context.Context, in *EchoRequest, opts ...grpc.CallOption) (Echo_ServerStreamingEchoClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Echo_serviceDesc.Streams[0], "/grpc.examples.echo.Echo/ServerStreamingEcho", opts...)
+	stream, err := c.cc.NewStream(ctx, echoServerStreamingEchoStreamDesc, "/grpc.examples.echo.Echo/ServerStreamingEcho", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -76,8 +85,13 @@ func (x *echoServerStreamingEchoClient) Recv() (*EchoResponse, error) {
 	return m, nil
 }
 
+var echoClientStreamingEchoStreamDesc = &grpc.StreamDesc{
+	StreamName:    "ClientStreamingEcho",
+	ClientStreams: true,
+}
+
 func (c *echoClient) ClientStreamingEcho(ctx context.Context, opts ...grpc.CallOption) (Echo_ClientStreamingEchoClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Echo_serviceDesc.Streams[1], "/grpc.examples.echo.Echo/ClientStreamingEcho", opts...)
+	stream, err := c.cc.NewStream(ctx, echoClientStreamingEchoStreamDesc, "/grpc.examples.echo.Echo/ClientStreamingEcho", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -110,8 +124,14 @@ func (x *echoClientStreamingEchoClient) CloseAndRecv() (*EchoResponse, error) {
 	return m, nil
 }
 
+var echoBidirectionalStreamingEchoStreamDesc = &grpc.StreamDesc{
+	StreamName:    "BidirectionalStreamingEcho",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *echoClient) BidirectionalStreamingEcho(ctx context.Context, opts ...grpc.CallOption) (Echo_BidirectionalStreamingEchoClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Echo_serviceDesc.Streams[2], "/grpc.examples.echo.Echo/BidirectionalStreamingEcho", opts...)
+	stream, err := c.cc.NewStream(ctx, echoBidirectionalStreamingEchoStreamDesc, "/grpc.examples.echo.Echo/BidirectionalStreamingEcho", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -141,65 +161,62 @@ func (x *echoBidirectionalStreamingEchoClient) Recv() (*EchoResponse, error) {
 	return m, nil
 }
 
-// EchoServer is the server API for Echo service.
-// All implementations should embed UnimplementedEchoServer
-// for forward compatibility
-type EchoServer interface {
+// EchoService is the service API for Echo service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterEchoService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type EchoService struct {
 	// UnaryEcho is unary echo.
-	UnaryEcho(context.Context, *EchoRequest) (*EchoResponse, error)
+	UnaryEcho func(context.Context, *EchoRequest) (*EchoResponse, error)
 	// ServerStreamingEcho is server side streaming.
-	ServerStreamingEcho(*EchoRequest, Echo_ServerStreamingEchoServer) error
+	ServerStreamingEcho func(*EchoRequest, Echo_ServerStreamingEchoServer) error
 	// ClientStreamingEcho is client side streaming.
-	ClientStreamingEcho(Echo_ClientStreamingEchoServer) error
+	ClientStreamingEcho func(Echo_ClientStreamingEchoServer) error
 	// BidirectionalStreamingEcho is bidi streaming.
-	BidirectionalStreamingEcho(Echo_BidirectionalStreamingEchoServer) error
+	BidirectionalStreamingEcho func(Echo_BidirectionalStreamingEchoServer) error
 }
 
-// UnimplementedEchoServer should be embedded to have forward compatible implementations.
-type UnimplementedEchoServer struct {
-}
-
-func (*UnimplementedEchoServer) UnaryEcho(context.Context, *EchoRequest) (*EchoResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnaryEcho not implemented")
-}
-func (*UnimplementedEchoServer) ServerStreamingEcho(*EchoRequest, Echo_ServerStreamingEchoServer) error {
-	return status.Errorf(codes.Unimplemented, "method ServerStreamingEcho not implemented")
-}
-func (*UnimplementedEchoServer) ClientStreamingEcho(Echo_ClientStreamingEchoServer) error {
-	return status.Errorf(codes.Unimplemented, "method ClientStreamingEcho not implemented")
-}
-func (*UnimplementedEchoServer) BidirectionalStreamingEcho(Echo_BidirectionalStreamingEchoServer) error {
-	return status.Errorf(codes.Unimplemented, "method BidirectionalStreamingEcho not implemented")
-}
-
-func RegisterEchoServer(s *grpc.Server, srv EchoServer) {
-	s.RegisterService(&_Echo_serviceDesc, srv)
-}
-
-func _Echo_UnaryEcho_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *EchoService) unaryEcho(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.UnaryEcho == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method UnaryEcho not implemented")
+	}
 	in := new(EchoRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(EchoServer).UnaryEcho(ctx, in)
+		return s.UnaryEcho(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.examples.echo.Echo/UnaryEcho",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(EchoServer).UnaryEcho(ctx, req.(*EchoRequest))
+		return s.UnaryEcho(ctx, req.(*EchoRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _Echo_ServerStreamingEcho_Handler(srv interface{}, stream grpc.ServerStream) error {
+func (s *EchoService) serverStreamingEcho(_ interface{}, stream grpc.ServerStream) error {
+	if s.ServerStreamingEcho == nil {
+		return status.Errorf(codes.Unimplemented, "method ServerStreamingEcho not implemented")
+	}
 	m := new(EchoRequest)
 	if err := stream.RecvMsg(m); err != nil {
 		return err
 	}
-	return srv.(EchoServer).ServerStreamingEcho(m, &echoServerStreamingEchoServer{stream})
+	return s.ServerStreamingEcho(m, &echoServerStreamingEchoServer{stream})
+}
+func (s *EchoService) clientStreamingEcho(_ interface{}, stream grpc.ServerStream) error {
+	if s.ClientStreamingEcho == nil {
+		return status.Errorf(codes.Unimplemented, "method ClientStreamingEcho not implemented")
+	}
+	return s.ClientStreamingEcho(&echoClientStreamingEchoServer{stream})
+}
+func (s *EchoService) bidirectionalStreamingEcho(_ interface{}, stream grpc.ServerStream) error {
+	if s.BidirectionalStreamingEcho == nil {
+		return status.Errorf(codes.Unimplemented, "method BidirectionalStreamingEcho not implemented")
+	}
+	return s.BidirectionalStreamingEcho(&echoBidirectionalStreamingEchoServer{stream})
 }
 
 type Echo_ServerStreamingEchoServer interface {
@@ -215,10 +232,6 @@ func (x *echoServerStreamingEchoServer) Send(m *EchoResponse) error {
 	return x.ServerStream.SendMsg(m)
 }
 
-func _Echo_ClientStreamingEcho_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(EchoServer).ClientStreamingEcho(&echoClientStreamingEchoServer{stream})
-}
-
 type Echo_ClientStreamingEchoServer interface {
 	SendAndClose(*EchoResponse) error
 	Recv() (*EchoRequest, error)
@@ -241,10 +254,6 @@ func (x *echoClientStreamingEchoServer) Recv() (*EchoRequest, error) {
 	return m, nil
 }
 
-func _Echo_BidirectionalStreamingEcho_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(EchoServer).BidirectionalStreamingEcho(&echoBidirectionalStreamingEchoServer{stream})
-}
-
 type Echo_BidirectionalStreamingEchoServer interface {
 	Send(*EchoResponse) error
 	Recv() (*EchoRequest, error)
@@ -267,32 +276,82 @@ func (x *echoBidirectionalStreamingEchoServer) Recv() (*EchoRequest, error) {
 	return m, nil
 }
 
-var _Echo_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.examples.echo.Echo",
-	HandlerType: (*EchoServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "UnaryEcho",
-			Handler:    _Echo_UnaryEcho_Handler,
+// RegisterEchoService registers a service implementation with a gRPC server.
+func RegisterEchoService(s grpc.ServiceRegistrar, srv *EchoService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.examples.echo.Echo",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "UnaryEcho",
+				Handler:    srv.unaryEcho,
+			},
 		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "ServerStreamingEcho",
-			Handler:       _Echo_ServerStreamingEcho_Handler,
-			ServerStreams: true,
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "ServerStreamingEcho",
+				Handler:       srv.serverStreamingEcho,
+				ServerStreams: true,
+			},
+			{
+				StreamName:    "ClientStreamingEcho",
+				Handler:       srv.clientStreamingEcho,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "BidirectionalStreamingEcho",
+				Handler:       srv.bidirectionalStreamingEcho,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
 		},
-		{
-			StreamName:    "ClientStreamingEcho",
-			Handler:       _Echo_ClientStreamingEcho_Handler,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "BidirectionalStreamingEcho",
-			Handler:       _Echo_BidirectionalStreamingEcho_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "examples/features/proto/echo/echo.proto",
+		Metadata: "examples/features/proto/echo/echo.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewEchoService creates a new EchoService containing the
+// implemented methods of the Echo service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewEchoService(s interface{}) *EchoService {
+	ns := &EchoService{}
+	if h, ok := s.(interface {
+		UnaryEcho(context.Context, *EchoRequest) (*EchoResponse, error)
+	}); ok {
+		ns.UnaryEcho = h.UnaryEcho
+	}
+	if h, ok := s.(interface {
+		ServerStreamingEcho(*EchoRequest, Echo_ServerStreamingEchoServer) error
+	}); ok {
+		ns.ServerStreamingEcho = h.ServerStreamingEcho
+	}
+	if h, ok := s.(interface {
+		ClientStreamingEcho(Echo_ClientStreamingEchoServer) error
+	}); ok {
+		ns.ClientStreamingEcho = h.ClientStreamingEcho
+	}
+	if h, ok := s.(interface {
+		BidirectionalStreamingEcho(Echo_BidirectionalStreamingEchoServer) error
+	}); ok {
+		ns.BidirectionalStreamingEcho = h.BidirectionalStreamingEcho
+	}
+	return ns
+}
+
+// UnstableEchoService is the service API for Echo service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableEchoService interface {
+	// UnaryEcho is unary echo.
+	UnaryEcho(context.Context, *EchoRequest) (*EchoResponse, error)
+	// ServerStreamingEcho is server side streaming.
+	ServerStreamingEcho(*EchoRequest, Echo_ServerStreamingEchoServer) error
+	// ClientStreamingEcho is client side streaming.
+	ClientStreamingEcho(Echo_ClientStreamingEchoServer) error
+	// BidirectionalStreamingEcho is bidi streaming.
+	BidirectionalStreamingEcho(Echo_BidirectionalStreamingEchoServer) error
 }

examples/features/reflection/server/main.go

@@ -35,21 +35,13 @@ import (
 
 var port = flag.Int("port", 50051, "the port to serve on")
 
-// hwServer is used to implement helloworld.GreeterServer.
-type hwServer struct {
-	hwpb.UnimplementedGreeterServer
-}
-
-// SayHello implements helloworld.GreeterServer
-func (s *hwServer) SayHello(ctx context.Context, in *hwpb.HelloRequest) (*hwpb.HelloReply, error) {
+// sayHello implements helloworld.GreeterServer.SayHello
+func sayHello(ctx context.Context, in *hwpb.HelloRequest) (*hwpb.HelloReply, error) {
 	return &hwpb.HelloReply{Message: "Hello " + in.Name}, nil
 }
 
-type ecServer struct {
-	ecpb.UnimplementedEchoServer
-}
-
-func (s *ecServer) UnaryEcho(ctx context.Context, req *ecpb.EchoRequest) (*ecpb.EchoResponse, error) {
+// unaryEcho implements echo.Echo.UnaryEcho
+func unaryEcho(ctx context.Context, req *ecpb.EchoRequest) (*ecpb.EchoResponse, error) {
 	return &ecpb.EchoResponse{Message: req.Message}, nil
 }
 
@@ -64,10 +56,10 @@ func main() {
 	s := grpc.NewServer()
 
 	// Register Greeter on the server.
-	hwpb.RegisterGreeterServer(s, &hwServer{})
+	hwpb.RegisterGreeterService(s, &hwpb.GreeterService{SayHello: sayHello})
 
 	// Register RouteGuide on the same server.
-	ecpb.RegisterEchoServer(s, &ecServer{})
+	ecpb.RegisterEchoService(s, &ecpb.EchoService{UnaryEcho: unaryEcho})
 
 	// Register reflection service on gRPC server.
 	reflection.Register(s)

examples/features/retry/server/main.go

@@ -37,7 +37,6 @@ import (
 var port = flag.Int("port", 50052, "port number")
 
 type failingServer struct {
-	pb.UnimplementedEchoServer
 	mu sync.Mutex
 
 	reqCounter uint
@@ -86,7 +85,7 @@ func main() {
 		reqModulo:  4,
 	}
 
-	pb.RegisterEchoServer(s, failingservice)
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: failingservice.UnaryEcho})
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)
 	}

examples/features/wait_for_ready/main.go

@@ -34,12 +34,7 @@ import (
 	pb "google.golang.org/grpc/examples/features/proto/echo"
 )
 
-// server is used to implement EchoServer.
-type server struct {
-	pb.UnimplementedEchoServer
-}
-
-func (s *server) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
+func unaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
 	return &pb.EchoResponse{Message: req.Message}, nil
 }
 
@@ -50,7 +45,7 @@ func serve() {
 		log.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	pb.RegisterEchoServer(s, &server{})
+	pb.RegisterEchoService(s, &pb.EchoService{UnaryEcho: unaryEcho})
 
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)

examples/features/xds/server/main.go

@@ -45,8 +45,6 @@ const (
 
 // server is used to implement helloworld.GreeterServer.
 type server struct {
-	pb.UnimplementedGreeterServer
-
 	serverName string
 }
 
@@ -124,7 +122,8 @@ func main() {
 		log.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	pb.RegisterGreeterServer(s, newServer(hostname))
+	hw := newServer(hostname)
+	pb.RegisterGreeterService(s, &pb.GreeterService{SayHello: hw.SayHello})
 
 	reflection.Register(s)
 	healthServer := health.NewServer()

examples/go.mod

@@ -3,8 +3,11 @@ module google.golang.org/grpc/examples
 go 1.11
 
 require (
+	cloud.google.com/go v0.63.0 // indirect
 	github.com/golang/protobuf v1.4.2
-	golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be
-	google.golang.org/genproto v0.0.0-20200624020401-64a14ca9d1ad
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98
 	google.golang.org/grpc v1.31.0
 )
+
+replace google.golang.org/grpc => ../

examples/go.sum

@@ -1,22 +1,68 @@
-cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ=
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
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 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
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@@ -26,53 +72,259 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
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 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -84,5 +336,19 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0 h1:UhZDfRO8JRQru4/+LlLE0BRKGF8L+PICnvYZmx/fEGA=
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

examples/gotutorial.md

@@ -268,7 +268,13 @@ if err != nil {
         log.Fatalf("failed to listen: %v", err)
 }
 grpcServer := grpc.NewServer()
-pb.RegisterRouteGuideServer(grpcServer, &routeGuideServer{})
+rgs := &routeGuideServer{}
+pb.RegisterRouteGuideService(grpcServer, pb.RouteGuideService{
+        GetFeature:   rgs.GetFeature,
+        ListFeatures: rgs.ListFeatures,
+        RecordRoute:  rgs.RecordRoute,
+        RouteChat:    rgs.RouteChat,
+})
 ... // determine whether to use TLS
 grpcServer.Serve(lis)
 ```

examples/helloworld/greeter_server/main.go

@@ -32,13 +32,8 @@ const (
 	port = ":50051"
 )
 
-// server is used to implement helloworld.GreeterServer.
-type server struct {
-	pb.UnimplementedGreeterServer
-}
-
-// SayHello implements helloworld.GreeterServer
-func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
+// sayHello implements helloworld.GreeterServer.SayHello
+func sayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
 	log.Printf("Received: %v", in.GetName())
 	return &pb.HelloReply{Message: "Hello " + in.GetName()}, nil
 }
@@ -49,7 +44,7 @@ func main() {
 		log.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	pb.RegisterGreeterServer(s, &server{})
+	pb.RegisterGreeterService(s, &pb.GreeterService{SayHello: sayHello})
 	if err := s.Serve(lis); err != nil {
 		log.Fatalf("failed to serve: %v", err)
 	}

examples/helloworld/helloworld/helloworld_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // GreeterClient is the client API for Greeter service.
 //
@@ -29,6 +29,10 @@ func NewGreeterClient(cc grpc.ClientConnInterface) GreeterClient {
 	return &greeterClient{cc}
 }
 
+var greeterSayHelloStreamDesc = &grpc.StreamDesc{
+	StreamName: "SayHello",
+}
+
 func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) {
 	out := new(HelloReply)
 	err := c.cc.Invoke(ctx, "/helloworld.Greeter/SayHello", in, out, opts...)
@@ -38,53 +42,74 @@ func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...
 	return out, nil
 }
 
-// GreeterServer is the server API for Greeter service.
-// All implementations should embed UnimplementedGreeterServer
-// for forward compatibility
-type GreeterServer interface {
+// GreeterService is the service API for Greeter service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterGreeterService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type GreeterService struct {
 	// Sends a greeting
-	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
+	SayHello func(context.Context, *HelloRequest) (*HelloReply, error)
 }
 
-// UnimplementedGreeterServer should be embedded to have forward compatible implementations.
-type UnimplementedGreeterServer struct {
-}
-
-func (*UnimplementedGreeterServer) SayHello(context.Context, *HelloRequest) (*HelloReply, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented")
-}
-
-func RegisterGreeterServer(s *grpc.Server, srv GreeterServer) {
-	s.RegisterService(&_Greeter_serviceDesc, srv)
-}
-
-func _Greeter_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *GreeterService) sayHello(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.SayHello == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+	}
 	in := new(HelloRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(GreeterServer).SayHello(ctx, in)
+		return s.SayHello(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/helloworld.Greeter/SayHello",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(GreeterServer).SayHello(ctx, req.(*HelloRequest))
+		return s.SayHello(ctx, req.(*HelloRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-var _Greeter_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "helloworld.Greeter",
-	HandlerType: (*GreeterServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "SayHello",
-			Handler:    _Greeter_SayHello_Handler,
+// RegisterGreeterService registers a service implementation with a gRPC server.
+func RegisterGreeterService(s grpc.ServiceRegistrar, srv *GreeterService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "helloworld.Greeter",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "SayHello",
+				Handler:    srv.sayHello,
+			},
 		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "examples/helloworld/helloworld/helloworld.proto",
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "examples/helloworld/helloworld/helloworld.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewGreeterService creates a new GreeterService containing the
+// implemented methods of the Greeter service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewGreeterService(s interface{}) *GreeterService {
+	ns := &GreeterService{}
+	if h, ok := s.(interface {
+		SayHello(context.Context, *HelloRequest) (*HelloReply, error)
+	}); ok {
+		ns.SayHello = h.SayHello
+	}
+	return ns
+}
+
+// UnstableGreeterService is the service API for Greeter service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableGreeterService interface {
+	// Sends a greeting
+	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
 }

examples/route_guide/routeguide/route_guide_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // RouteGuideClient is the client API for RouteGuide service.
 //
@@ -51,6 +51,10 @@ func NewRouteGuideClient(cc grpc.ClientConnInterface) RouteGuideClient {
 	return &routeGuideClient{cc}
 }
 
+var routeGuideGetFeatureStreamDesc = &grpc.StreamDesc{
+	StreamName: "GetFeature",
+}
+
 func (c *routeGuideClient) GetFeature(ctx context.Context, in *Point, opts ...grpc.CallOption) (*Feature, error) {
 	out := new(Feature)
 	err := c.cc.Invoke(ctx, "/routeguide.RouteGuide/GetFeature", in, out, opts...)
@@ -60,8 +64,13 @@ func (c *routeGuideClient) GetFeature(ctx context.Context, in *Point, opts ...gr
 	return out, nil
 }
 
+var routeGuideListFeaturesStreamDesc = &grpc.StreamDesc{
+	StreamName:    "ListFeatures",
+	ServerStreams: true,
+}
+
 func (c *routeGuideClient) ListFeatures(ctx context.Context, in *Rectangle, opts ...grpc.CallOption) (RouteGuide_ListFeaturesClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_RouteGuide_serviceDesc.Streams[0], "/routeguide.RouteGuide/ListFeatures", opts...)
+	stream, err := c.cc.NewStream(ctx, routeGuideListFeaturesStreamDesc, "/routeguide.RouteGuide/ListFeatures", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -92,8 +101,13 @@ func (x *routeGuideListFeaturesClient) Recv() (*Feature, error) {
 	return m, nil
 }
 
+var routeGuideRecordRouteStreamDesc = &grpc.StreamDesc{
+	StreamName:    "RecordRoute",
+	ClientStreams: true,
+}
+
 func (c *routeGuideClient) RecordRoute(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RecordRouteClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_RouteGuide_serviceDesc.Streams[1], "/routeguide.RouteGuide/RecordRoute", opts...)
+	stream, err := c.cc.NewStream(ctx, routeGuideRecordRouteStreamDesc, "/routeguide.RouteGuide/RecordRoute", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -126,8 +140,14 @@ func (x *routeGuideRecordRouteClient) CloseAndRecv() (*RouteSummary, error) {
 	return m, nil
 }
 
+var routeGuideRouteChatStreamDesc = &grpc.StreamDesc{
+	StreamName:    "RouteChat",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *routeGuideClient) RouteChat(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RouteChatClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_RouteGuide_serviceDesc.Streams[2], "/routeguide.RouteGuide/RouteChat", opts...)
+	stream, err := c.cc.NewStream(ctx, routeGuideRouteChatStreamDesc, "/routeguide.RouteGuide/RouteChat", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -157,10 +177,207 @@ func (x *routeGuideRouteChatClient) Recv() (*RouteNote, error) {
 	return m, nil
 }
 
-// RouteGuideServer is the server API for RouteGuide service.
-// All implementations should embed UnimplementedRouteGuideServer
-// for forward compatibility
-type RouteGuideServer interface {
+// RouteGuideService is the service API for RouteGuide service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterRouteGuideService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type RouteGuideService struct {
+	// A simple RPC.
+	//
+	// Obtains the feature at a given position.
+	//
+	// A feature with an empty name is returned if there's no feature at the given
+	// position.
+	GetFeature func(context.Context, *Point) (*Feature, error)
+	// A server-to-client streaming RPC.
+	//
+	// Obtains the Features available within the given Rectangle.  Results are
+	// streamed rather than returned at once (e.g. in a response message with a
+	// repeated field), as the rectangle may cover a large area and contain a
+	// huge number of features.
+	ListFeatures func(*Rectangle, RouteGuide_ListFeaturesServer) error
+	// A client-to-server streaming RPC.
+	//
+	// Accepts a stream of Points on a route being traversed, returning a
+	// RouteSummary when traversal is completed.
+	RecordRoute func(RouteGuide_RecordRouteServer) error
+	// A Bidirectional streaming RPC.
+	//
+	// Accepts a stream of RouteNotes sent while a route is being traversed,
+	// while receiving other RouteNotes (e.g. from other users).
+	RouteChat func(RouteGuide_RouteChatServer) error
+}
+
+func (s *RouteGuideService) getFeature(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetFeature == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetFeature not implemented")
+	}
+	in := new(Point)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return s.GetFeature(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/routeguide.RouteGuide/GetFeature",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetFeature(ctx, req.(*Point))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+func (s *RouteGuideService) listFeatures(_ interface{}, stream grpc.ServerStream) error {
+	if s.ListFeatures == nil {
+		return status.Errorf(codes.Unimplemented, "method ListFeatures not implemented")
+	}
+	m := new(Rectangle)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return s.ListFeatures(m, &routeGuideListFeaturesServer{stream})
+}
+func (s *RouteGuideService) recordRoute(_ interface{}, stream grpc.ServerStream) error {
+	if s.RecordRoute == nil {
+		return status.Errorf(codes.Unimplemented, "method RecordRoute not implemented")
+	}
+	return s.RecordRoute(&routeGuideRecordRouteServer{stream})
+}
+func (s *RouteGuideService) routeChat(_ interface{}, stream grpc.ServerStream) error {
+	if s.RouteChat == nil {
+		return status.Errorf(codes.Unimplemented, "method RouteChat not implemented")
+	}
+	return s.RouteChat(&routeGuideRouteChatServer{stream})
+}
+
+type RouteGuide_ListFeaturesServer interface {
+	Send(*Feature) error
+	grpc.ServerStream
+}
+
+type routeGuideListFeaturesServer struct {
+	grpc.ServerStream
+}
+
+func (x *routeGuideListFeaturesServer) Send(m *Feature) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+type RouteGuide_RecordRouteServer interface {
+	SendAndClose(*RouteSummary) error
+	Recv() (*Point, error)
+	grpc.ServerStream
+}
+
+type routeGuideRecordRouteServer struct {
+	grpc.ServerStream
+}
+
+func (x *routeGuideRecordRouteServer) SendAndClose(m *RouteSummary) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *routeGuideRecordRouteServer) Recv() (*Point, error) {
+	m := new(Point)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+type RouteGuide_RouteChatServer interface {
+	Send(*RouteNote) error
+	Recv() (*RouteNote, error)
+	grpc.ServerStream
+}
+
+type routeGuideRouteChatServer struct {
+	grpc.ServerStream
+}
+
+func (x *routeGuideRouteChatServer) Send(m *RouteNote) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *routeGuideRouteChatServer) Recv() (*RouteNote, error) {
+	m := new(RouteNote)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// RegisterRouteGuideService registers a service implementation with a gRPC server.
+func RegisterRouteGuideService(s grpc.ServiceRegistrar, srv *RouteGuideService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "routeguide.RouteGuide",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "GetFeature",
+				Handler:    srv.getFeature,
+			},
+		},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "ListFeatures",
+				Handler:       srv.listFeatures,
+				ServerStreams: true,
+			},
+			{
+				StreamName:    "RecordRoute",
+				Handler:       srv.recordRoute,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "RouteChat",
+				Handler:       srv.routeChat,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+		},
+		Metadata: "examples/route_guide/routeguide/route_guide.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewRouteGuideService creates a new RouteGuideService containing the
+// implemented methods of the RouteGuide service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewRouteGuideService(s interface{}) *RouteGuideService {
+	ns := &RouteGuideService{}
+	if h, ok := s.(interface {
+		GetFeature(context.Context, *Point) (*Feature, error)
+	}); ok {
+		ns.GetFeature = h.GetFeature
+	}
+	if h, ok := s.(interface {
+		ListFeatures(*Rectangle, RouteGuide_ListFeaturesServer) error
+	}); ok {
+		ns.ListFeatures = h.ListFeatures
+	}
+	if h, ok := s.(interface {
+		RecordRoute(RouteGuide_RecordRouteServer) error
+	}); ok {
+		ns.RecordRoute = h.RecordRoute
+	}
+	if h, ok := s.(interface {
+		RouteChat(RouteGuide_RouteChatServer) error
+	}); ok {
+		ns.RouteChat = h.RouteChat
+	}
+	return ns
+}
+
+// UnstableRouteGuideService is the service API for RouteGuide service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableRouteGuideService interface {
 	// A simple RPC.
 	//
 	// Obtains the feature at a given position.
@@ -186,145 +403,3 @@ type RouteGuideServer interface {
 	// while receiving other RouteNotes (e.g. from other users).
 	RouteChat(RouteGuide_RouteChatServer) error
 }
-
-// UnimplementedRouteGuideServer should be embedded to have forward compatible implementations.
-type UnimplementedRouteGuideServer struct {
-}
-
-func (*UnimplementedRouteGuideServer) GetFeature(context.Context, *Point) (*Feature, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetFeature not implemented")
-}
-func (*UnimplementedRouteGuideServer) ListFeatures(*Rectangle, RouteGuide_ListFeaturesServer) error {
-	return status.Errorf(codes.Unimplemented, "method ListFeatures not implemented")
-}
-func (*UnimplementedRouteGuideServer) RecordRoute(RouteGuide_RecordRouteServer) error {
-	return status.Errorf(codes.Unimplemented, "method RecordRoute not implemented")
-}
-func (*UnimplementedRouteGuideServer) RouteChat(RouteGuide_RouteChatServer) error {
-	return status.Errorf(codes.Unimplemented, "method RouteChat not implemented")
-}
-
-func RegisterRouteGuideServer(s *grpc.Server, srv RouteGuideServer) {
-	s.RegisterService(&_RouteGuide_serviceDesc, srv)
-}
-
-func _RouteGuide_GetFeature_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(Point)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(RouteGuideServer).GetFeature(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/routeguide.RouteGuide/GetFeature",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(RouteGuideServer).GetFeature(ctx, req.(*Point))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _RouteGuide_ListFeatures_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(Rectangle)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(RouteGuideServer).ListFeatures(m, &routeGuideListFeaturesServer{stream})
-}
-
-type RouteGuide_ListFeaturesServer interface {
-	Send(*Feature) error
-	grpc.ServerStream
-}
-
-type routeGuideListFeaturesServer struct {
-	grpc.ServerStream
-}
-
-func (x *routeGuideListFeaturesServer) Send(m *Feature) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func _RouteGuide_RecordRoute_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(RouteGuideServer).RecordRoute(&routeGuideRecordRouteServer{stream})
-}
-
-type RouteGuide_RecordRouteServer interface {
-	SendAndClose(*RouteSummary) error
-	Recv() (*Point, error)
-	grpc.ServerStream
-}
-
-type routeGuideRecordRouteServer struct {
-	grpc.ServerStream
-}
-
-func (x *routeGuideRecordRouteServer) SendAndClose(m *RouteSummary) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *routeGuideRecordRouteServer) Recv() (*Point, error) {
-	m := new(Point)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func _RouteGuide_RouteChat_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(RouteGuideServer).RouteChat(&routeGuideRouteChatServer{stream})
-}
-
-type RouteGuide_RouteChatServer interface {
-	Send(*RouteNote) error
-	Recv() (*RouteNote, error)
-	grpc.ServerStream
-}
-
-type routeGuideRouteChatServer struct {
-	grpc.ServerStream
-}
-
-func (x *routeGuideRouteChatServer) Send(m *RouteNote) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *routeGuideRouteChatServer) Recv() (*RouteNote, error) {
-	m := new(RouteNote)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _RouteGuide_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "routeguide.RouteGuide",
-	HandlerType: (*RouteGuideServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "GetFeature",
-			Handler:    _RouteGuide_GetFeature_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "ListFeatures",
-			Handler:       _RouteGuide_ListFeatures_Handler,
-			ServerStreams: true,
-		},
-		{
-			StreamName:    "RecordRoute",
-			Handler:       _RouteGuide_RecordRoute_Handler,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "RouteChat",
-			Handler:       _RouteGuide_RouteChat_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "examples/route_guide/routeguide/route_guide.proto",
-}

examples/route_guide/server/server.go

@@ -54,7 +54,6 @@ var (
 )
 
 type routeGuideServer struct {
-	pb.UnimplementedRouteGuideServer
 	savedFeatures []*pb.Feature // read-only after initialized
 
 	mu         sync.Mutex // protects routeNotes
@@ -238,7 +237,7 @@ func main() {
 		opts = []grpc.ServerOption{grpc.Creds(creds)}
 	}
 	grpcServer := grpc.NewServer(opts...)
-	pb.RegisterRouteGuideServer(grpcServer, newServer())
+	pb.RegisterRouteGuideService(grpcServer, pb.NewRouteGuideService(newServer()))
 	grpcServer.Serve(lis)
 }
 

health/grpc_health_v1/health.pb.go

@@ -4,8 +4,12 @@
 package grpc_health_v1
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -159,3 +163,181 @@ var fileDescriptor_e265fd9d4e077217 = []byte{
 	0xd3, 0x20, 0x46, 0xe8, 0x85, 0x19, 0x26, 0xb1, 0x81, 0x93, 0x83, 0x31, 0x20, 0x00, 0x00, 0xff,
 	0xff, 0x12, 0x7d, 0x96, 0xcb, 0x2d, 0x02, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// HealthClient is the client API for Health service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type HealthClient interface {
+	// If the requested service is unknown, the call will fail with status
+	// NOT_FOUND.
+	Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error)
+	// Performs a watch for the serving status of the requested service.
+	// The server will immediately send back a message indicating the current
+	// serving status.  It will then subsequently send a new message whenever
+	// the service's serving status changes.
+	//
+	// If the requested service is unknown when the call is received, the
+	// server will send a message setting the serving status to
+	// SERVICE_UNKNOWN but will *not* terminate the call.  If at some
+	// future point, the serving status of the service becomes known, the
+	// server will send a new message with the service's serving status.
+	//
+	// If the call terminates with status UNIMPLEMENTED, then clients
+	// should assume this method is not supported and should not retry the
+	// call.  If the call terminates with any other status (including OK),
+	// clients should retry the call with appropriate exponential backoff.
+	Watch(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (Health_WatchClient, error)
+}
+
+type healthClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewHealthClient(cc grpc.ClientConnInterface) HealthClient {
+	return &healthClient{cc}
+}
+
+func (c *healthClient) Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error) {
+	out := new(HealthCheckResponse)
+	err := c.cc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *healthClient) Watch(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (Health_WatchClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_Health_serviceDesc.Streams[0], "/grpc.health.v1.Health/Watch", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &healthWatchClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type Health_WatchClient interface {
+	Recv() (*HealthCheckResponse, error)
+	grpc.ClientStream
+}
+
+type healthWatchClient struct {
+	grpc.ClientStream
+}
+
+func (x *healthWatchClient) Recv() (*HealthCheckResponse, error) {
+	m := new(HealthCheckResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// HealthServer is the server API for Health service.
+type HealthServer interface {
+	// If the requested service is unknown, the call will fail with status
+	// NOT_FOUND.
+	Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
+	// Performs a watch for the serving status of the requested service.
+	// The server will immediately send back a message indicating the current
+	// serving status.  It will then subsequently send a new message whenever
+	// the service's serving status changes.
+	//
+	// If the requested service is unknown when the call is received, the
+	// server will send a message setting the serving status to
+	// SERVICE_UNKNOWN but will *not* terminate the call.  If at some
+	// future point, the serving status of the service becomes known, the
+	// server will send a new message with the service's serving status.
+	//
+	// If the call terminates with status UNIMPLEMENTED, then clients
+	// should assume this method is not supported and should not retry the
+	// call.  If the call terminates with any other status (including OK),
+	// clients should retry the call with appropriate exponential backoff.
+	Watch(*HealthCheckRequest, Health_WatchServer) error
+}
+
+// UnimplementedHealthServer can be embedded to have forward compatible implementations.
+type UnimplementedHealthServer struct {
+}
+
+func (*UnimplementedHealthServer) Check(ctx context.Context, req *HealthCheckRequest) (*HealthCheckResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Check not implemented")
+}
+func (*UnimplementedHealthServer) Watch(req *HealthCheckRequest, srv Health_WatchServer) error {
+	return status.Errorf(codes.Unimplemented, "method Watch not implemented")
+}
+
+func RegisterHealthServer(s *grpc.Server, srv HealthServer) {
+	s.RegisterService(&_Health_serviceDesc, srv)
+}
+
+func _Health_Check_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HealthCheckRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(HealthServer).Check(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.health.v1.Health/Check",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(HealthServer).Check(ctx, req.(*HealthCheckRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Health_Watch_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(HealthCheckRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(HealthServer).Watch(m, &healthWatchServer{stream})
+}
+
+type Health_WatchServer interface {
+	Send(*HealthCheckResponse) error
+	grpc.ServerStream
+}
+
+type healthWatchServer struct {
+	grpc.ServerStream
+}
+
+func (x *healthWatchServer) Send(m *HealthCheckResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+var _Health_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.health.v1.Health",
+	HandlerType: (*HealthServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Check",
+			Handler:    _Health_Check_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Watch",
+			Handler:       _Health_Watch_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "grpc/health/v1/health.proto",
+}

health/grpc_health_v1/health_grpc.pb.go

@@ -11,15 +11,16 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// HealthClient is the client API for Health service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type HealthClient interface {
+// HealthService is the service API for Health service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterHealthService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type HealthService struct {
 	// If the requested service is unknown, the call will fail with status
 	// NOT_FOUND.
-	Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error)
+	Check func(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
 	// Performs a watch for the serving status of the requested service.
 	// The server will immediately send back a message indicating the current
 	// serving status.  It will then subsequently send a new message whenever
@@ -35,62 +36,89 @@ type HealthClient interface {
 	// should assume this method is not supported and should not retry the
 	// call.  If the call terminates with any other status (including OK),
 	// clients should retry the call with appropriate exponential backoff.
-	Watch(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (Health_WatchClient, error)
+	Watch func(*HealthCheckRequest, Health_WatchServer) error
 }
 
-type healthClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewHealthClient(cc grpc.ClientConnInterface) HealthClient {
-	return &healthClient{cc}
-}
-
-func (c *healthClient) Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error) {
-	out := new(HealthCheckResponse)
-	err := c.cc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, opts...)
-	if err != nil {
+func (s *HealthService) check(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.Check == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method Check not implemented")
+	}
+	in := new(HealthCheckRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
-}
-
-func (c *healthClient) Watch(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (Health_WatchClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Health_serviceDesc.Streams[0], "/grpc.health.v1.Health/Watch", opts...)
-	if err != nil {
-		return nil, err
+	if interceptor == nil {
+		return s.Check(ctx, in)
 	}
-	x := &healthWatchClient{stream}
-	if err := x.ClientStream.SendMsg(in); err != nil {
-		return nil, err
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.health.v1.Health/Check",
 	}
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.Check(ctx, req.(*HealthCheckRequest))
 	}
-	return x, nil
+	return interceptor(ctx, in, info, handler)
 }
-
-type Health_WatchClient interface {
-	Recv() (*HealthCheckResponse, error)
-	grpc.ClientStream
-}
-
-type healthWatchClient struct {
-	grpc.ClientStream
-}
-
-func (x *healthWatchClient) Recv() (*HealthCheckResponse, error) {
-	m := new(HealthCheckResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
+func (s *HealthService) watch(_ interface{}, stream grpc.ServerStream) error {
+	if s.Watch == nil {
+		return status.Errorf(codes.Unimplemented, "method Watch not implemented")
 	}
-	return m, nil
+	m := new(HealthCheckRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return s.Watch(m, &healthWatchServer{stream})
 }
 
-// HealthServer is the server API for Health service.
-// All implementations should embed UnimplementedHealthServer
-// for forward compatibility
-type HealthServer interface {
+// RegisterHealthService registers a service implementation with a gRPC server.
+func RegisterHealthService(s grpc.ServiceRegistrar, srv *HealthService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.health.v1.Health",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "Check",
+				Handler:    srv.check,
+			},
+		},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "Watch",
+				Handler:       srv.watch,
+				ServerStreams: true,
+			},
+		},
+		Metadata: "grpc/health/v1/health.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewHealthService creates a new HealthService containing the
+// implemented methods of the Health service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewHealthService(s interface{}) *HealthService {
+	ns := &HealthService{}
+	if h, ok := s.(interface {
+		Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
+	}); ok {
+		ns.Check = h.Check
+	}
+	if h, ok := s.(interface {
+		Watch(*HealthCheckRequest, Health_WatchServer) error
+	}); ok {
+		ns.Watch = h.Watch
+	}
+	return ns
+}
+
+// UnstableHealthService is the service API for Health service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableHealthService interface {
 	// If the requested service is unknown, the call will fail with status
 	// NOT_FOUND.
 	Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
@@ -111,76 +139,3 @@ type HealthServer interface {
 	// clients should retry the call with appropriate exponential backoff.
 	Watch(*HealthCheckRequest, Health_WatchServer) error
 }
-
-// UnimplementedHealthServer should be embedded to have forward compatible implementations.
-type UnimplementedHealthServer struct {
-}
-
-func (*UnimplementedHealthServer) Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Check not implemented")
-}
-func (*UnimplementedHealthServer) Watch(*HealthCheckRequest, Health_WatchServer) error {
-	return status.Errorf(codes.Unimplemented, "method Watch not implemented")
-}
-
-func RegisterHealthServer(s *grpc.Server, srv HealthServer) {
-	s.RegisterService(&_Health_serviceDesc, srv)
-}
-
-func _Health_Check_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(HealthCheckRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(HealthServer).Check(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.health.v1.Health/Check",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(HealthServer).Check(ctx, req.(*HealthCheckRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Health_Watch_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(HealthCheckRequest)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(HealthServer).Watch(m, &healthWatchServer{stream})
-}
-
-type Health_WatchServer interface {
-	Send(*HealthCheckResponse) error
-	grpc.ServerStream
-}
-
-type healthWatchServer struct {
-	grpc.ServerStream
-}
-
-func (x *healthWatchServer) Send(m *HealthCheckResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-var _Health_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.health.v1.Health",
-	HandlerType: (*HealthServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Check",
-			Handler:    _Health_Check_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "Watch",
-			Handler:       _Health_Watch_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "grpc/health/v1/health.proto",
-}

internal/binarylog/binarylog_end2end_test.go

@@ -115,10 +115,11 @@ var (
 )
 
 type testServer struct {
-	testpb.UnimplementedTestServiceServer
 	te *test
 }
 
+var _ testpb.UnstableTestServiceService = (*testServer)(nil)
+
 func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
 	md, ok := metadata.FromIncomingContext(ctx)
 	if ok {
@@ -216,7 +217,7 @@ func (s *testServer) ServerStreamCall(in *testpb.SimpleRequest, stream testpb.Te
 type test struct {
 	t *testing.T
 
-	testServer testpb.TestServiceServer // nil means none
+	testService *testpb.TestServiceService // nil means none
 	// srv and srvAddr are set once startServer is called.
 	srv     *grpc.Server
 	srvAddr string // Server IP without port.
@@ -271,8 +272,8 @@ func (lw *listenerWrapper) Accept() (net.Conn, error) {
 
 // startServer starts a gRPC server listening. Callers should defer a
 // call to te.tearDown to clean up.
-func (te *test) startServer(ts testpb.TestServiceServer) {
-	te.testServer = ts
+func (te *test) startServer(ts *testpb.TestServiceService) {
+	te.testService = ts
 	lis, err := net.Listen("tcp", "localhost:0")
 
 	lis = &listenerWrapper{
@@ -286,8 +287,8 @@ func (te *test) startServer(ts testpb.TestServiceServer) {
 	var opts []grpc.ServerOption
 	s := grpc.NewServer(opts...)
 	te.srv = s
-	if te.testServer != nil {
-		testpb.RegisterTestServiceServer(s, te.testServer)
+	if te.testService != nil {
+		testpb.RegisterTestServiceService(s, te.testService)
 	}
 
 	go s.Serve(lis)
@@ -783,7 +784,7 @@ func (ed *expectedData) toServerLogEntries() []*pb.GrpcLogEntry {
 
 func runRPCs(t *testing.T, tc *testConfig, cc *rpcConfig) *expectedData {
 	te := newTest(t, tc)
-	te.startServer(&testServer{te: te})
+	te.startServer(testpb.NewTestServiceService(&testServer{te: te}))
 	defer te.tearDown()
 
 	expect := &expectedData{

interop/alts/server/server.go

@@ -64,7 +64,7 @@ func main() {
 	}
 	altsTC := alts.NewServerCreds(opts)
 	grpcServer := grpc.NewServer(grpc.Creds(altsTC), grpc.InTapHandle(authz))
-	testpb.RegisterTestServiceServer(grpcServer, interop.NewTestServer())
+	testpb.RegisterTestServiceService(grpcServer, interop.NewTestServer())
 	grpcServer.Serve(lis)
 }
 

interop/grpc_testing/test_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // TestServiceClient is the client API for TestService service.
 //
@@ -47,6 +47,10 @@ func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
 	return &testServiceClient{cc}
 }
 
+var testServiceEmptyCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "EmptyCall",
+}
+
 func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
 	out := new(Empty)
 	err := c.cc.Invoke(ctx, "/grpc.testing.TestService/EmptyCall", in, out, opts...)
@@ -56,6 +60,10 @@ func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...gr
 	return out, nil
 }
 
+var testServiceUnaryCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "UnaryCall",
+}
+
 func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
 	out := new(SimpleResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.TestService/UnaryCall", in, out, opts...)
@@ -65,8 +73,13 @@ func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, op
 	return out, nil
 }
 
+var testServiceStreamingOutputCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "StreamingOutputCall",
+	ServerStreams: true,
+}
+
 func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[0], "/grpc.testing.TestService/StreamingOutputCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceStreamingOutputCallStreamDesc, "/grpc.testing.TestService/StreamingOutputCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -97,8 +110,13 @@ func (x *testServiceStreamingOutputCallClient) Recv() (*StreamingOutputCallRespo
 	return m, nil
 }
 
+var testServiceStreamingInputCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "StreamingInputCall",
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[1], "/grpc.testing.TestService/StreamingInputCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceStreamingInputCallStreamDesc, "/grpc.testing.TestService/StreamingInputCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -131,8 +149,14 @@ func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*StreamingInputCal
 	return m, nil
 }
 
+var testServiceFullDuplexCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "FullDuplexCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[2], "/grpc.testing.TestService/FullDuplexCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceFullDuplexCallStreamDesc, "/grpc.testing.TestService/FullDuplexCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -162,8 +186,14 @@ func (x *testServiceFullDuplexCallClient) Recv() (*StreamingOutputCallResponse,
 	return m, nil
 }
 
+var testServiceHalfDuplexCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "HalfDuplexCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[3], "/grpc.testing.TestService/HalfDuplexCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceHalfDuplexCallStreamDesc, "/grpc.testing.TestService/HalfDuplexCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -193,101 +223,100 @@ func (x *testServiceHalfDuplexCallClient) Recv() (*StreamingOutputCallResponse,
 	return m, nil
 }
 
-// TestServiceServer is the server API for TestService service.
-// All implementations should embed UnimplementedTestServiceServer
-// for forward compatibility
-type TestServiceServer interface {
+// TestServiceService is the service API for TestService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterTestServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type TestServiceService struct {
 	// One empty request followed by one empty response.
-	EmptyCall(context.Context, *Empty) (*Empty, error)
+	EmptyCall func(context.Context, *Empty) (*Empty, error)
 	// One request followed by one response.
 	// The server returns the client payload as-is.
-	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	UnaryCall func(context.Context, *SimpleRequest) (*SimpleResponse, error)
 	// One request followed by a sequence of responses (streamed download).
 	// The server returns the payload with client desired type and sizes.
-	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	StreamingOutputCall func(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
 	// A sequence of requests followed by one response (streamed upload).
 	// The server returns the aggregated size of client payload as the result.
-	StreamingInputCall(TestService_StreamingInputCallServer) error
+	StreamingInputCall func(TestService_StreamingInputCallServer) error
 	// A sequence of requests with each request served by the server immediately.
 	// As one request could lead to multiple responses, this interface
 	// demonstrates the idea of full duplexing.
-	FullDuplexCall(TestService_FullDuplexCallServer) error
+	FullDuplexCall func(TestService_FullDuplexCallServer) error
 	// A sequence of requests followed by a sequence of responses.
 	// The server buffers all the client requests and then serves them in order. A
 	// stream of responses are returned to the client when the server starts with
 	// first request.
-	HalfDuplexCall(TestService_HalfDuplexCallServer) error
+	HalfDuplexCall func(TestService_HalfDuplexCallServer) error
 }
 
-// UnimplementedTestServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedTestServiceServer struct {
-}
-
-func (*UnimplementedTestServiceServer) EmptyCall(context.Context, *Empty) (*Empty, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method EmptyCall not implemented")
-}
-func (*UnimplementedTestServiceServer) UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
-}
-func (*UnimplementedTestServiceServer) StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingOutputCall not implemented")
-}
-func (*UnimplementedTestServiceServer) StreamingInputCall(TestService_StreamingInputCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingInputCall not implemented")
-}
-func (*UnimplementedTestServiceServer) FullDuplexCall(TestService_FullDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
-}
-func (*UnimplementedTestServiceServer) HalfDuplexCall(TestService_HalfDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method HalfDuplexCall not implemented")
-}
-
-func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
-	s.RegisterService(&_TestService_serviceDesc, srv)
-}
-
-func _TestService_EmptyCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *TestServiceService) emptyCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.EmptyCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method EmptyCall not implemented")
+	}
 	in := new(Empty)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(TestServiceServer).EmptyCall(ctx, in)
+		return s.EmptyCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.TestService/EmptyCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).EmptyCall(ctx, req.(*Empty))
+		return s.EmptyCall(ctx, req.(*Empty))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *TestServiceService) unaryCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.UnaryCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
+	}
 	in := new(SimpleRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(TestServiceServer).UnaryCall(ctx, in)
+		return s.UnaryCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.TestService/UnaryCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+		return s.UnaryCall(ctx, req.(*SimpleRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+func (s *TestServiceService) streamingOutputCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.StreamingOutputCall == nil {
+		return status.Errorf(codes.Unimplemented, "method StreamingOutputCall not implemented")
+	}
 	m := new(StreamingOutputCallRequest)
 	if err := stream.RecvMsg(m); err != nil {
 		return err
 	}
-	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+	return s.StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+}
+func (s *TestServiceService) streamingInputCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.StreamingInputCall == nil {
+		return status.Errorf(codes.Unimplemented, "method StreamingInputCall not implemented")
+	}
+	return s.StreamingInputCall(&testServiceStreamingInputCallServer{stream})
+}
+func (s *TestServiceService) fullDuplexCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.FullDuplexCall == nil {
+		return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
+	}
+	return s.FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+func (s *TestServiceService) halfDuplexCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.HalfDuplexCall == nil {
+		return status.Errorf(codes.Unimplemented, "method HalfDuplexCall not implemented")
+	}
+	return s.HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
 }
 
 type TestService_StreamingOutputCallServer interface {
@@ -303,10 +332,6 @@ func (x *testServiceStreamingOutputCallServer) Send(m *StreamingOutputCallRespon
 	return x.ServerStream.SendMsg(m)
 }
 
-func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
-}
-
 type TestService_StreamingInputCallServer interface {
 	SendAndClose(*StreamingInputCallResponse) error
 	Recv() (*StreamingInputCallRequest, error)
@@ -329,10 +354,6 @@ func (x *testServiceStreamingInputCallServer) Recv() (*StreamingInputCallRequest
 	return m, nil
 }
 
-func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
-}
-
 type TestService_FullDuplexCallServer interface {
 	Send(*StreamingOutputCallResponse) error
 	Recv() (*StreamingOutputCallRequest, error)
@@ -355,10 +376,6 @@ func (x *testServiceFullDuplexCallServer) Recv() (*StreamingOutputCallRequest, e
 	return m, nil
 }
 
-func _TestService_HalfDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
-}
-
 type TestService_HalfDuplexCallServer interface {
 	Send(*StreamingOutputCallResponse) error
 	Recv() (*StreamingOutputCallRequest, error)
@@ -381,44 +398,116 @@ func (x *testServiceHalfDuplexCallServer) Recv() (*StreamingOutputCallRequest, e
 	return m, nil
 }
 
-var _TestService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.TestService",
-	HandlerType: (*TestServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "EmptyCall",
-			Handler:    _TestService_EmptyCall_Handler,
+// RegisterTestServiceService registers a service implementation with a gRPC server.
+func RegisterTestServiceService(s grpc.ServiceRegistrar, srv *TestServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.TestService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "EmptyCall",
+				Handler:    srv.emptyCall,
+			},
+			{
+				MethodName: "UnaryCall",
+				Handler:    srv.unaryCall,
+			},
 		},
-		{
-			MethodName: "UnaryCall",
-			Handler:    _TestService_UnaryCall_Handler,
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "StreamingOutputCall",
+				Handler:       srv.streamingOutputCall,
+				ServerStreams: true,
+			},
+			{
+				StreamName:    "StreamingInputCall",
+				Handler:       srv.streamingInputCall,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "FullDuplexCall",
+				Handler:       srv.fullDuplexCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "HalfDuplexCall",
+				Handler:       srv.halfDuplexCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
 		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "StreamingOutputCall",
-			Handler:       _TestService_StreamingOutputCall_Handler,
-			ServerStreams: true,
-		},
-		{
-			StreamName:    "StreamingInputCall",
-			Handler:       _TestService_StreamingInputCall_Handler,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "FullDuplexCall",
-			Handler:       _TestService_FullDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "HalfDuplexCall",
-			Handler:       _TestService_HalfDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "interop/grpc_testing/test.proto",
+		Metadata: "interop/grpc_testing/test.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewTestServiceService creates a new TestServiceService containing the
+// implemented methods of the TestService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewTestServiceService(s interface{}) *TestServiceService {
+	ns := &TestServiceService{}
+	if h, ok := s.(interface {
+		EmptyCall(context.Context, *Empty) (*Empty, error)
+	}); ok {
+		ns.EmptyCall = h.EmptyCall
+	}
+	if h, ok := s.(interface {
+		UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	}); ok {
+		ns.UnaryCall = h.UnaryCall
+	}
+	if h, ok := s.(interface {
+		StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	}); ok {
+		ns.StreamingOutputCall = h.StreamingOutputCall
+	}
+	if h, ok := s.(interface {
+		StreamingInputCall(TestService_StreamingInputCallServer) error
+	}); ok {
+		ns.StreamingInputCall = h.StreamingInputCall
+	}
+	if h, ok := s.(interface {
+		FullDuplexCall(TestService_FullDuplexCallServer) error
+	}); ok {
+		ns.FullDuplexCall = h.FullDuplexCall
+	}
+	if h, ok := s.(interface {
+		HalfDuplexCall(TestService_HalfDuplexCallServer) error
+	}); ok {
+		ns.HalfDuplexCall = h.HalfDuplexCall
+	}
+	return ns
+}
+
+// UnstableTestServiceService is the service API for TestService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableTestServiceService interface {
+	// One empty request followed by one empty response.
+	EmptyCall(context.Context, *Empty) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(TestService_StreamingInputCallServer) error
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(TestService_HalfDuplexCallServer) error
 }
 
 // UnimplementedServiceClient is the client API for UnimplementedService service.
@@ -437,6 +526,10 @@ func NewUnimplementedServiceClient(cc grpc.ClientConnInterface) UnimplementedSer
 	return &unimplementedServiceClient{cc}
 }
 
+var unimplementedServiceUnimplementedCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "UnimplementedCall",
+}
+
 func (c *unimplementedServiceClient) UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
 	out := new(Empty)
 	err := c.cc.Invoke(ctx, "/grpc.testing.UnimplementedService/UnimplementedCall", in, out, opts...)
@@ -446,55 +539,76 @@ func (c *unimplementedServiceClient) UnimplementedCall(ctx context.Context, in *
 	return out, nil
 }
 
-// UnimplementedServiceServer is the server API for UnimplementedService service.
-// All implementations should embed UnimplementedUnimplementedServiceServer
-// for forward compatibility
-type UnimplementedServiceServer interface {
+// UnimplementedServiceService is the service API for UnimplementedService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterUnimplementedServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type UnimplementedServiceService struct {
 	// A call that no server should implement
-	UnimplementedCall(context.Context, *Empty) (*Empty, error)
+	UnimplementedCall func(context.Context, *Empty) (*Empty, error)
 }
 
-// UnimplementedUnimplementedServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedUnimplementedServiceServer struct {
-}
-
-func (*UnimplementedUnimplementedServiceServer) UnimplementedCall(context.Context, *Empty) (*Empty, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnimplementedCall not implemented")
-}
-
-func RegisterUnimplementedServiceServer(s *grpc.Server, srv UnimplementedServiceServer) {
-	s.RegisterService(&_UnimplementedService_serviceDesc, srv)
-}
-
-func _UnimplementedService_UnimplementedCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *UnimplementedServiceService) unimplementedCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.UnimplementedCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method UnimplementedCall not implemented")
+	}
 	in := new(Empty)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, in)
+		return s.UnimplementedCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.UnimplementedService/UnimplementedCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, req.(*Empty))
+		return s.UnimplementedCall(ctx, req.(*Empty))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-var _UnimplementedService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.UnimplementedService",
-	HandlerType: (*UnimplementedServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "UnimplementedCall",
-			Handler:    _UnimplementedService_UnimplementedCall_Handler,
+// RegisterUnimplementedServiceService registers a service implementation with a gRPC server.
+func RegisterUnimplementedServiceService(s grpc.ServiceRegistrar, srv *UnimplementedServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.UnimplementedService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "UnimplementedCall",
+				Handler:    srv.unimplementedCall,
+			},
 		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "interop/grpc_testing/test.proto",
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "interop/grpc_testing/test.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewUnimplementedServiceService creates a new UnimplementedServiceService containing the
+// implemented methods of the UnimplementedService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewUnimplementedServiceService(s interface{}) *UnimplementedServiceService {
+	ns := &UnimplementedServiceService{}
+	if h, ok := s.(interface {
+		UnimplementedCall(context.Context, *Empty) (*Empty, error)
+	}); ok {
+		ns.UnimplementedCall = h.UnimplementedCall
+	}
+	return ns
+}
+
+// UnstableUnimplementedServiceService is the service API for UnimplementedService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableUnimplementedServiceService interface {
+	// A call that no server should implement
+	UnimplementedCall(context.Context, *Empty) (*Empty, error)
 }
 
 // LoadBalancerStatsServiceClient is the client API for LoadBalancerStatsService service.
@@ -513,6 +627,10 @@ func NewLoadBalancerStatsServiceClient(cc grpc.ClientConnInterface) LoadBalancer
 	return &loadBalancerStatsServiceClient{cc}
 }
 
+var loadBalancerStatsServiceGetClientStatsStreamDesc = &grpc.StreamDesc{
+	StreamName: "GetClientStats",
+}
+
 func (c *loadBalancerStatsServiceClient) GetClientStats(ctx context.Context, in *LoadBalancerStatsRequest, opts ...grpc.CallOption) (*LoadBalancerStatsResponse, error) {
 	out := new(LoadBalancerStatsResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.LoadBalancerStatsService/GetClientStats", in, out, opts...)
@@ -522,53 +640,74 @@ func (c *loadBalancerStatsServiceClient) GetClientStats(ctx context.Context, in
 	return out, nil
 }
 
-// LoadBalancerStatsServiceServer is the server API for LoadBalancerStatsService service.
-// All implementations should embed UnimplementedLoadBalancerStatsServiceServer
-// for forward compatibility
-type LoadBalancerStatsServiceServer interface {
+// LoadBalancerStatsServiceService is the service API for LoadBalancerStatsService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterLoadBalancerStatsServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type LoadBalancerStatsServiceService struct {
 	// Gets the backend distribution for RPCs sent by a test client.
-	GetClientStats(context.Context, *LoadBalancerStatsRequest) (*LoadBalancerStatsResponse, error)
+	GetClientStats func(context.Context, *LoadBalancerStatsRequest) (*LoadBalancerStatsResponse, error)
 }
 
-// UnimplementedLoadBalancerStatsServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedLoadBalancerStatsServiceServer struct {
-}
-
-func (*UnimplementedLoadBalancerStatsServiceServer) GetClientStats(context.Context, *LoadBalancerStatsRequest) (*LoadBalancerStatsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetClientStats not implemented")
-}
-
-func RegisterLoadBalancerStatsServiceServer(s *grpc.Server, srv LoadBalancerStatsServiceServer) {
-	s.RegisterService(&_LoadBalancerStatsService_serviceDesc, srv)
-}
-
-func _LoadBalancerStatsService_GetClientStats_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *LoadBalancerStatsServiceService) getClientStats(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetClientStats == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetClientStats not implemented")
+	}
 	in := new(LoadBalancerStatsRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(LoadBalancerStatsServiceServer).GetClientStats(ctx, in)
+		return s.GetClientStats(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.LoadBalancerStatsService/GetClientStats",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(LoadBalancerStatsServiceServer).GetClientStats(ctx, req.(*LoadBalancerStatsRequest))
+		return s.GetClientStats(ctx, req.(*LoadBalancerStatsRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-var _LoadBalancerStatsService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.LoadBalancerStatsService",
-	HandlerType: (*LoadBalancerStatsServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "GetClientStats",
-			Handler:    _LoadBalancerStatsService_GetClientStats_Handler,
+// RegisterLoadBalancerStatsServiceService registers a service implementation with a gRPC server.
+func RegisterLoadBalancerStatsServiceService(s grpc.ServiceRegistrar, srv *LoadBalancerStatsServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.LoadBalancerStatsService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "GetClientStats",
+				Handler:    srv.getClientStats,
+			},
 		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "interop/grpc_testing/test.proto",
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "interop/grpc_testing/test.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewLoadBalancerStatsServiceService creates a new LoadBalancerStatsServiceService containing the
+// implemented methods of the LoadBalancerStatsService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewLoadBalancerStatsServiceService(s interface{}) *LoadBalancerStatsServiceService {
+	ns := &LoadBalancerStatsServiceService{}
+	if h, ok := s.(interface {
+		GetClientStats(context.Context, *LoadBalancerStatsRequest) (*LoadBalancerStatsResponse, error)
+	}); ok {
+		ns.GetClientStats = h.GetClientStats
+	}
+	return ns
+}
+
+// UnstableLoadBalancerStatsServiceService is the service API for LoadBalancerStatsService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableLoadBalancerStatsServiceService interface {
+	// Gets the backend distribution for RPCs sent by a test client.
+	GetClientStats(context.Context, *LoadBalancerStatsRequest) (*LoadBalancerStatsResponse, error)
 }

interop/server/server.go

@@ -76,6 +76,6 @@ func main() {
 		opts = append(opts, grpc.Creds(altsTC))
 	}
 	server := grpc.NewServer(opts...)
-	testpb.RegisterTestServiceServer(server, interop.NewTestServer())
+	testpb.RegisterTestServiceService(server, interop.NewTestServer())
 	server.Serve(lis)
 }

interop/test_utils.go

@@ -673,13 +673,11 @@ func DoPickFirstUnary(tc testpb.TestServiceClient) {
 	}
 }
 
-type testServer struct {
-	testpb.UnimplementedTestServiceServer
-}
+type testServer struct{}
 
 // NewTestServer creates a test server for test service.
-func NewTestServer() testpb.TestServiceServer {
-	return &testServer{}
+func NewTestServer() *testpb.TestServiceService {
+	return testpb.NewTestServiceService(testpb.UnstableTestServiceService(&testServer{}))
 }
 
 func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {

interop/xds/client/client.go

@@ -95,10 +95,6 @@ var (
 	logger = grpclog.Component("interop")
 )
 
-type statsService struct {
-	testpb.UnimplementedLoadBalancerStatsServiceServer
-}
-
 func hasRPCSucceeded() bool {
 	return atomic.LoadUint32(&rpcSucceeded) > 0
 }
@@ -111,7 +107,7 @@ func setRPCSucceeded() {
 // and return the distribution of remote peers. This is essentially a clientside
 // LB reporting mechanism that is designed to be queried by an external test
 // driver when verifying that the client is distributing RPCs as expected.
-func (s *statsService) GetClientStats(ctx context.Context, in *testpb.LoadBalancerStatsRequest) (*testpb.LoadBalancerStatsResponse, error) {
+func getClientStats(ctx context.Context, in *testpb.LoadBalancerStatsRequest) (*testpb.LoadBalancerStatsResponse, error) {
 	mu.Lock()
 	watcherKey := statsWatcherKey{currentRequestID, currentRequestID + in.GetNumRpcs()}
 	watcher, ok := watchers[watcherKey]
@@ -226,7 +222,7 @@ func main() {
 	}
 	s := grpc.NewServer()
 	defer s.Stop()
-	testpb.RegisterLoadBalancerStatsServiceServer(s, &statsService{})
+	testpb.RegisterLoadBalancerStatsServiceService(s, &testpb.LoadBalancerStatsServiceService{GetClientStats: getClientStats})
 	go s.Serve(lis)
 
 	clients := make([]testpb.TestServiceClient, *numChannels)

interop/xds/server/server.go

@@ -49,16 +49,12 @@ func getHostname() string {
 	return hostname
 }
 
-type server struct {
-	testpb.UnimplementedTestServiceServer
-}
-
-func (s *server) EmptyCall(ctx context.Context, _ *testpb.Empty) (*testpb.Empty, error) {
+func emptyCall(ctx context.Context, _ *testpb.Empty) (*testpb.Empty, error) {
 	grpc.SetHeader(ctx, metadata.Pairs("hostname", hostname))
 	return &testpb.Empty{}, nil
 }
 
-func (s *server) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+func unaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
 	grpc.SetHeader(ctx, metadata.Pairs("hostname", hostname))
 	return &testpb.SimpleResponse{ServerId: *serverID, Hostname: hostname}, nil
 }
@@ -71,6 +67,6 @@ func main() {
 		logger.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	testpb.RegisterTestServiceServer(s, &server{})
+	testpb.RegisterTestServiceService(s, &testpb.TestServiceService{EmptyCall: emptyCall, UnaryCall: unaryCall})
 	s.Serve(lis)
 }

profiling/proto/service.pb.go

@@ -4,8 +4,12 @@
 package proto
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -362,3 +366,125 @@ var fileDescriptor_e1ab2aa17b47c6fb = []byte{
 	0x95, 0xbb, 0x2e, 0xf9, 0xc9, 0xfd, 0xaf, 0x42, 0xfa, 0xbc, 0xf9, 0x13, 0x00, 0x00, 0xff, 0xff,
 	0x5d, 0x47, 0x09, 0xa9, 0x19, 0x03, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// ProfilingClient is the client API for Profiling service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type ProfilingClient interface {
+	// Enable allows users to toggle profiling on and off remotely.
+	Enable(ctx context.Context, in *EnableRequest, opts ...grpc.CallOption) (*EnableResponse, error)
+	// GetStreamStats is used to retrieve an array of stream-level stats from a
+	// gRPC client/server.
+	GetStreamStats(ctx context.Context, in *GetStreamStatsRequest, opts ...grpc.CallOption) (*GetStreamStatsResponse, error)
+}
+
+type profilingClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewProfilingClient(cc grpc.ClientConnInterface) ProfilingClient {
+	return &profilingClient{cc}
+}
+
+func (c *profilingClient) Enable(ctx context.Context, in *EnableRequest, opts ...grpc.CallOption) (*EnableResponse, error) {
+	out := new(EnableResponse)
+	err := c.cc.Invoke(ctx, "/grpc.go.profiling.v1alpha.Profiling/Enable", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *profilingClient) GetStreamStats(ctx context.Context, in *GetStreamStatsRequest, opts ...grpc.CallOption) (*GetStreamStatsResponse, error) {
+	out := new(GetStreamStatsResponse)
+	err := c.cc.Invoke(ctx, "/grpc.go.profiling.v1alpha.Profiling/GetStreamStats", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ProfilingServer is the server API for Profiling service.
+type ProfilingServer interface {
+	// Enable allows users to toggle profiling on and off remotely.
+	Enable(context.Context, *EnableRequest) (*EnableResponse, error)
+	// GetStreamStats is used to retrieve an array of stream-level stats from a
+	// gRPC client/server.
+	GetStreamStats(context.Context, *GetStreamStatsRequest) (*GetStreamStatsResponse, error)
+}
+
+// UnimplementedProfilingServer can be embedded to have forward compatible implementations.
+type UnimplementedProfilingServer struct {
+}
+
+func (*UnimplementedProfilingServer) Enable(ctx context.Context, req *EnableRequest) (*EnableResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Enable not implemented")
+}
+func (*UnimplementedProfilingServer) GetStreamStats(ctx context.Context, req *GetStreamStatsRequest) (*GetStreamStatsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetStreamStats not implemented")
+}
+
+func RegisterProfilingServer(s *grpc.Server, srv ProfilingServer) {
+	s.RegisterService(&_Profiling_serviceDesc, srv)
+}
+
+func _Profiling_Enable_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(EnableRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ProfilingServer).Enable(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.go.profiling.v1alpha.Profiling/Enable",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ProfilingServer).Enable(ctx, req.(*EnableRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Profiling_GetStreamStats_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetStreamStatsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ProfilingServer).GetStreamStats(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.go.profiling.v1alpha.Profiling/GetStreamStats",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ProfilingServer).GetStreamStats(ctx, req.(*GetStreamStatsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Profiling_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.go.profiling.v1alpha.Profiling",
+	HandlerType: (*ProfilingServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Enable",
+			Handler:    _Profiling_Enable_Handler,
+		},
+		{
+			MethodName: "GetStreamStats",
+			Handler:    _Profiling_GetStreamStats_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "profiling/proto/service.proto",
+}

profiling/proto/service_grpc.pb.go

@@ -11,120 +11,111 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// ProfilingClient is the client API for Profiling service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type ProfilingClient interface {
+// ProfilingService is the service API for Profiling service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterProfilingService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type ProfilingService struct {
 	// Enable allows users to toggle profiling on and off remotely.
-	Enable(ctx context.Context, in *EnableRequest, opts ...grpc.CallOption) (*EnableResponse, error)
+	Enable func(context.Context, *EnableRequest) (*EnableResponse, error)
 	// GetStreamStats is used to retrieve an array of stream-level stats from a
 	// gRPC client/server.
-	GetStreamStats(ctx context.Context, in *GetStreamStatsRequest, opts ...grpc.CallOption) (*GetStreamStatsResponse, error)
+	GetStreamStats func(context.Context, *GetStreamStatsRequest) (*GetStreamStatsResponse, error)
 }
 
-type profilingClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewProfilingClient(cc grpc.ClientConnInterface) ProfilingClient {
-	return &profilingClient{cc}
-}
-
-func (c *profilingClient) Enable(ctx context.Context, in *EnableRequest, opts ...grpc.CallOption) (*EnableResponse, error) {
-	out := new(EnableResponse)
-	err := c.cc.Invoke(ctx, "/grpc.go.profiling.v1alpha.Profiling/Enable", in, out, opts...)
-	if err != nil {
+func (s *ProfilingService) enable(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.Enable == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method Enable not implemented")
+	}
+	in := new(EnableRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.Enable(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.go.profiling.v1alpha.Profiling/Enable",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.Enable(ctx, req.(*EnableRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
-
-func (c *profilingClient) GetStreamStats(ctx context.Context, in *GetStreamStatsRequest, opts ...grpc.CallOption) (*GetStreamStatsResponse, error) {
-	out := new(GetStreamStatsResponse)
-	err := c.cc.Invoke(ctx, "/grpc.go.profiling.v1alpha.Profiling/GetStreamStats", in, out, opts...)
-	if err != nil {
+func (s *ProfilingService) getStreamStats(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetStreamStats == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetStreamStats not implemented")
+	}
+	in := new(GetStreamStatsRequest)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return out, nil
+	if interceptor == nil {
+		return s.GetStreamStats(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.go.profiling.v1alpha.Profiling/GetStreamStats",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetStreamStats(ctx, req.(*GetStreamStatsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
 
-// ProfilingServer is the server API for Profiling service.
-// All implementations should embed UnimplementedProfilingServer
-// for forward compatibility
-type ProfilingServer interface {
+// RegisterProfilingService registers a service implementation with a gRPC server.
+func RegisterProfilingService(s grpc.ServiceRegistrar, srv *ProfilingService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.go.profiling.v1alpha.Profiling",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "Enable",
+				Handler:    srv.enable,
+			},
+			{
+				MethodName: "GetStreamStats",
+				Handler:    srv.getStreamStats,
+			},
+		},
+		Streams:  []grpc.StreamDesc{},
+		Metadata: "profiling/proto/service.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewProfilingService creates a new ProfilingService containing the
+// implemented methods of the Profiling service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewProfilingService(s interface{}) *ProfilingService {
+	ns := &ProfilingService{}
+	if h, ok := s.(interface {
+		Enable(context.Context, *EnableRequest) (*EnableResponse, error)
+	}); ok {
+		ns.Enable = h.Enable
+	}
+	if h, ok := s.(interface {
+		GetStreamStats(context.Context, *GetStreamStatsRequest) (*GetStreamStatsResponse, error)
+	}); ok {
+		ns.GetStreamStats = h.GetStreamStats
+	}
+	return ns
+}
+
+// UnstableProfilingService is the service API for Profiling service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableProfilingService interface {
 	// Enable allows users to toggle profiling on and off remotely.
 	Enable(context.Context, *EnableRequest) (*EnableResponse, error)
 	// GetStreamStats is used to retrieve an array of stream-level stats from a
 	// gRPC client/server.
 	GetStreamStats(context.Context, *GetStreamStatsRequest) (*GetStreamStatsResponse, error)
 }
-
-// UnimplementedProfilingServer should be embedded to have forward compatible implementations.
-type UnimplementedProfilingServer struct {
-}
-
-func (*UnimplementedProfilingServer) Enable(context.Context, *EnableRequest) (*EnableResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Enable not implemented")
-}
-func (*UnimplementedProfilingServer) GetStreamStats(context.Context, *GetStreamStatsRequest) (*GetStreamStatsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetStreamStats not implemented")
-}
-
-func RegisterProfilingServer(s *grpc.Server, srv ProfilingServer) {
-	s.RegisterService(&_Profiling_serviceDesc, srv)
-}
-
-func _Profiling_Enable_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(EnableRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ProfilingServer).Enable(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.go.profiling.v1alpha.Profiling/Enable",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProfilingServer).Enable(ctx, req.(*EnableRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Profiling_GetStreamStats_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetStreamStatsRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ProfilingServer).GetStreamStats(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.go.profiling.v1alpha.Profiling/GetStreamStats",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProfilingServer).GetStreamStats(ctx, req.(*GetStreamStatsRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-var _Profiling_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.go.profiling.v1alpha.Profiling",
-	HandlerType: (*ProfilingServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Enable",
-			Handler:    _Profiling_Enable_Handler,
-		},
-		{
-			MethodName: "GetStreamStats",
-			Handler:    _Profiling_GetStreamStats_Handler,
-		},
-	},
-	Streams:  []grpc.StreamDesc{},
-	Metadata: "profiling/proto/service.proto",
-}

reflection/grpc_reflection_v1alpha/reflection.pb.go

@@ -4,8 +4,12 @@
 package grpc_reflection_v1alpha
 
 import (
+	context "context"
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -632,3 +636,119 @@ var fileDescriptor_e8cf9f2921ad6c95 = []byte{
 	0xcb, 0xb3, 0xdb, 0x8c, 0xdb, 0xea, 0x53, 0xd5, 0xb9, 0xfd, 0xd3, 0x35, 0xdc, 0x54, 0xbe, 0x39,
 	0xfd, 0x1b, 0x00, 0x00, 0xff, 0xff, 0x6c, 0x74, 0x3a, 0x67, 0xe7, 0x06, 0x00, 0x00,
 }
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// ServerReflectionClient is the client API for ServerReflection service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type ServerReflectionClient interface {
+	// The reflection service is structured as a bidirectional stream, ensuring
+	// all related requests go to a single server.
+	ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error)
+}
+
+type serverReflectionClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewServerReflectionClient(cc grpc.ClientConnInterface) ServerReflectionClient {
+	return &serverReflectionClient{cc}
+}
+
+func (c *serverReflectionClient) ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_ServerReflection_serviceDesc.Streams[0], "/grpc.reflection.v1alpha.ServerReflection/ServerReflectionInfo", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &serverReflectionServerReflectionInfoClient{stream}
+	return x, nil
+}
+
+type ServerReflection_ServerReflectionInfoClient interface {
+	Send(*ServerReflectionRequest) error
+	Recv() (*ServerReflectionResponse, error)
+	grpc.ClientStream
+}
+
+type serverReflectionServerReflectionInfoClient struct {
+	grpc.ClientStream
+}
+
+func (x *serverReflectionServerReflectionInfoClient) Send(m *ServerReflectionRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *serverReflectionServerReflectionInfoClient) Recv() (*ServerReflectionResponse, error) {
+	m := new(ServerReflectionResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// ServerReflectionServer is the server API for ServerReflection service.
+type ServerReflectionServer interface {
+	// The reflection service is structured as a bidirectional stream, ensuring
+	// all related requests go to a single server.
+	ServerReflectionInfo(ServerReflection_ServerReflectionInfoServer) error
+}
+
+// UnimplementedServerReflectionServer can be embedded to have forward compatible implementations.
+type UnimplementedServerReflectionServer struct {
+}
+
+func (*UnimplementedServerReflectionServer) ServerReflectionInfo(srv ServerReflection_ServerReflectionInfoServer) error {
+	return status.Errorf(codes.Unimplemented, "method ServerReflectionInfo not implemented")
+}
+
+func RegisterServerReflectionServer(s *grpc.Server, srv ServerReflectionServer) {
+	s.RegisterService(&_ServerReflection_serviceDesc, srv)
+}
+
+func _ServerReflection_ServerReflectionInfo_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(ServerReflectionServer).ServerReflectionInfo(&serverReflectionServerReflectionInfoServer{stream})
+}
+
+type ServerReflection_ServerReflectionInfoServer interface {
+	Send(*ServerReflectionResponse) error
+	Recv() (*ServerReflectionRequest, error)
+	grpc.ServerStream
+}
+
+type serverReflectionServerReflectionInfoServer struct {
+	grpc.ServerStream
+}
+
+func (x *serverReflectionServerReflectionInfoServer) Send(m *ServerReflectionResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *serverReflectionServerReflectionInfoServer) Recv() (*ServerReflectionRequest, error) {
+	m := new(ServerReflectionRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _ServerReflection_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.reflection.v1alpha.ServerReflection",
+	HandlerType: (*ServerReflectionServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "ServerReflectionInfo",
+			Handler:       _ServerReflection_ServerReflectionInfo_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "reflection/grpc_reflection_v1alpha/reflection.proto",
+}

reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go

@@ -3,7 +3,6 @@
 package grpc_reflection_v1alpha
 
 import (
-	context "context"
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
@@ -11,114 +10,66 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
-// ServerReflectionClient is the client API for ServerReflection service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
-type ServerReflectionClient interface {
+// ServerReflectionService is the service API for ServerReflection service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterServerReflectionService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type ServerReflectionService struct {
 	// The reflection service is structured as a bidirectional stream, ensuring
 	// all related requests go to a single server.
-	ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error)
+	ServerReflectionInfo func(ServerReflection_ServerReflectionInfoServer) error
 }
 
-type serverReflectionClient struct {
-	cc grpc.ClientConnInterface
-}
-
-func NewServerReflectionClient(cc grpc.ClientConnInterface) ServerReflectionClient {
-	return &serverReflectionClient{cc}
-}
-
-func (c *serverReflectionClient) ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_ServerReflection_serviceDesc.Streams[0], "/grpc.reflection.v1alpha.ServerReflection/ServerReflectionInfo", opts...)
-	if err != nil {
-		return nil, err
+func (s *ServerReflectionService) serverReflectionInfo(_ interface{}, stream grpc.ServerStream) error {
+	if s.ServerReflectionInfo == nil {
+		return status.Errorf(codes.Unimplemented, "method ServerReflectionInfo not implemented")
 	}
-	x := &serverReflectionServerReflectionInfoClient{stream}
-	return x, nil
+	return s.ServerReflectionInfo(&serverReflectionServerReflectionInfoServer{stream})
 }
 
-type ServerReflection_ServerReflectionInfoClient interface {
-	Send(*ServerReflectionRequest) error
-	Recv() (*ServerReflectionResponse, error)
-	grpc.ClientStream
-}
-
-type serverReflectionServerReflectionInfoClient struct {
-	grpc.ClientStream
-}
-
-func (x *serverReflectionServerReflectionInfoClient) Send(m *ServerReflectionRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *serverReflectionServerReflectionInfoClient) Recv() (*ServerReflectionResponse, error) {
-	m := new(ServerReflectionResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
+// RegisterServerReflectionService registers a service implementation with a gRPC server.
+func RegisterServerReflectionService(s grpc.ServiceRegistrar, srv *ServerReflectionService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.reflection.v1alpha.ServerReflection",
+		Methods:     []grpc.MethodDesc{},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "ServerReflectionInfo",
+				Handler:       srv.serverReflectionInfo,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+		},
+		Metadata: "reflection/grpc_reflection_v1alpha/reflection.proto",
 	}
-	return m, nil
+
+	s.RegisterService(&sd, nil)
 }
 
-// ServerReflectionServer is the server API for ServerReflection service.
-// All implementations should embed UnimplementedServerReflectionServer
-// for forward compatibility
-type ServerReflectionServer interface {
+// NewServerReflectionService creates a new ServerReflectionService containing the
+// implemented methods of the ServerReflection service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewServerReflectionService(s interface{}) *ServerReflectionService {
+	ns := &ServerReflectionService{}
+	if h, ok := s.(interface {
+		ServerReflectionInfo(ServerReflection_ServerReflectionInfoServer) error
+	}); ok {
+		ns.ServerReflectionInfo = h.ServerReflectionInfo
+	}
+	return ns
+}
+
+// UnstableServerReflectionService is the service API for ServerReflection service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableServerReflectionService interface {
 	// The reflection service is structured as a bidirectional stream, ensuring
 	// all related requests go to a single server.
 	ServerReflectionInfo(ServerReflection_ServerReflectionInfoServer) error
 }
-
-// UnimplementedServerReflectionServer should be embedded to have forward compatible implementations.
-type UnimplementedServerReflectionServer struct {
-}
-
-func (*UnimplementedServerReflectionServer) ServerReflectionInfo(ServerReflection_ServerReflectionInfoServer) error {
-	return status.Errorf(codes.Unimplemented, "method ServerReflectionInfo not implemented")
-}
-
-func RegisterServerReflectionServer(s *grpc.Server, srv ServerReflectionServer) {
-	s.RegisterService(&_ServerReflection_serviceDesc, srv)
-}
-
-func _ServerReflection_ServerReflectionInfo_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(ServerReflectionServer).ServerReflectionInfo(&serverReflectionServerReflectionInfoServer{stream})
-}
-
-type ServerReflection_ServerReflectionInfoServer interface {
-	Send(*ServerReflectionResponse) error
-	Recv() (*ServerReflectionRequest, error)
-	grpc.ServerStream
-}
-
-type serverReflectionServerReflectionInfoServer struct {
-	grpc.ServerStream
-}
-
-func (x *serverReflectionServerReflectionInfoServer) Send(m *ServerReflectionResponse) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-func (x *serverReflectionServerReflectionInfoServer) Recv() (*ServerReflectionRequest, error) {
-	m := new(ServerReflectionRequest)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-var _ServerReflection_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.reflection.v1alpha.ServerReflection",
-	HandlerType: (*ServerReflectionServer)(nil),
-	Methods:     []grpc.MethodDesc{},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "ServerReflectionInfo",
-			Handler:       _ServerReflection_ServerReflectionInfo_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "reflection/grpc_reflection_v1alpha/reflection.proto",
-}

reflection/grpc_testing/test_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // SearchServiceClient is the client API for SearchService service.
 //
@@ -29,6 +29,10 @@ func NewSearchServiceClient(cc grpc.ClientConnInterface) SearchServiceClient {
 	return &searchServiceClient{cc}
 }
 
+var searchServiceSearchStreamDesc = &grpc.StreamDesc{
+	StreamName: "Search",
+}
+
 func (c *searchServiceClient) Search(ctx context.Context, in *SearchRequest, opts ...grpc.CallOption) (*SearchResponse, error) {
 	out := new(SearchResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.SearchService/Search", in, out, opts...)
@@ -38,8 +42,14 @@ func (c *searchServiceClient) Search(ctx context.Context, in *SearchRequest, opt
 	return out, nil
 }
 
+var searchServiceStreamingSearchStreamDesc = &grpc.StreamDesc{
+	StreamName:    "StreamingSearch",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *searchServiceClient) StreamingSearch(ctx context.Context, opts ...grpc.CallOption) (SearchService_StreamingSearchClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_SearchService_serviceDesc.Streams[0], "/grpc.testing.SearchService/StreamingSearch", opts...)
+	stream, err := c.cc.NewStream(ctx, searchServiceStreamingSearchStreamDesc, "/grpc.testing.SearchService/StreamingSearch", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -69,49 +79,40 @@ func (x *searchServiceStreamingSearchClient) Recv() (*SearchResponse, error) {
 	return m, nil
 }
 
-// SearchServiceServer is the server API for SearchService service.
-// All implementations should embed UnimplementedSearchServiceServer
-// for forward compatibility
-type SearchServiceServer interface {
-	Search(context.Context, *SearchRequest) (*SearchResponse, error)
-	StreamingSearch(SearchService_StreamingSearchServer) error
+// SearchServiceService is the service API for SearchService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterSearchServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type SearchServiceService struct {
+	Search          func(context.Context, *SearchRequest) (*SearchResponse, error)
+	StreamingSearch func(SearchService_StreamingSearchServer) error
 }
 
-// UnimplementedSearchServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedSearchServiceServer struct {
-}
-
-func (*UnimplementedSearchServiceServer) Search(context.Context, *SearchRequest) (*SearchResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Search not implemented")
-}
-func (*UnimplementedSearchServiceServer) StreamingSearch(SearchService_StreamingSearchServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingSearch not implemented")
-}
-
-func RegisterSearchServiceServer(s *grpc.Server, srv SearchServiceServer) {
-	s.RegisterService(&_SearchService_serviceDesc, srv)
-}
-
-func _SearchService_Search_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *SearchServiceService) search(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.Search == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method Search not implemented")
+	}
 	in := new(SearchRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(SearchServiceServer).Search(ctx, in)
+		return s.Search(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.SearchService/Search",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(SearchServiceServer).Search(ctx, req.(*SearchRequest))
+		return s.Search(ctx, req.(*SearchRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _SearchService_StreamingSearch_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(SearchServiceServer).StreamingSearch(&searchServiceStreamingSearchServer{stream})
+func (s *SearchServiceService) streamingSearch(_ interface{}, stream grpc.ServerStream) error {
+	if s.StreamingSearch == nil {
+		return status.Errorf(codes.Unimplemented, "method StreamingSearch not implemented")
+	}
+	return s.StreamingSearch(&searchServiceStreamingSearchServer{stream})
 }
 
 type SearchService_StreamingSearchServer interface {
@@ -136,22 +137,56 @@ func (x *searchServiceStreamingSearchServer) Recv() (*SearchRequest, error) {
 	return m, nil
 }
 
-var _SearchService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.SearchService",
-	HandlerType: (*SearchServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "Search",
-			Handler:    _SearchService_Search_Handler,
+// RegisterSearchServiceService registers a service implementation with a gRPC server.
+func RegisterSearchServiceService(s grpc.ServiceRegistrar, srv *SearchServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.SearchService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "Search",
+				Handler:    srv.search,
+			},
 		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "StreamingSearch",
-			Handler:       _SearchService_StreamingSearch_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "StreamingSearch",
+				Handler:       srv.streamingSearch,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
 		},
-	},
-	Metadata: "reflection/grpc_testing/test.proto",
+		Metadata: "reflection/grpc_testing/test.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewSearchServiceService creates a new SearchServiceService containing the
+// implemented methods of the SearchService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewSearchServiceService(s interface{}) *SearchServiceService {
+	ns := &SearchServiceService{}
+	if h, ok := s.(interface {
+		Search(context.Context, *SearchRequest) (*SearchResponse, error)
+	}); ok {
+		ns.Search = h.Search
+	}
+	if h, ok := s.(interface {
+		StreamingSearch(SearchService_StreamingSearchServer) error
+	}); ok {
+		ns.StreamingSearch = h.StreamingSearch
+	}
+	return ns
+}
+
+// UnstableSearchServiceService is the service API for SearchService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableSearchServiceService interface {
+	Search(context.Context, *SearchRequest) (*SearchResponse, error)
+	StreamingSearch(SearchService_StreamingSearchServer) error
 }

reflection/serverreflection_test.go

@@ -166,9 +166,9 @@ func (x) TestAllExtensionNumbersForType(t *testing.T) {
 
 // Do end2end tests.
 
-type server struct {
-	pb.UnimplementedSearchServiceServer
-}
+type server struct{}
+
+var _ pb.UnstableSearchServiceService = (*server)(nil)
 
 func (s *server) Search(ctx context.Context, in *pb.SearchRequest) (*pb.SearchResponse, error) {
 	return &pb.SearchResponse{}, nil
@@ -195,7 +195,7 @@ func (x) TestReflectionEnd2end(t *testing.T) {
 		t.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
-	pb.RegisterSearchServiceServer(s, &server{})
+	pb.RegisterSearchServiceService(s, pb.NewSearchServiceService(&server{}))
 	pbv3.RegisterSearchServiceV3Server(s, &serverV3{})
 	// Register reflection service on s.
 	Register(s)

regenerate.sh

@@ -59,7 +59,8 @@ curl --silent https://raw.githubusercontent.com/istio/istio/master/security/prot
 
 mkdir -p ${WORKDIR}/out
 
-SOURCES=(
+# Generates legacy gRPC Server symbols in addition to the newer Service symbols
+LEGACY_SOURCES=(
   ${WORKDIR}/googleapis/google/rpc/code.proto
   ${WORKDIR}/grpc-proto/grpc/binlog/v1/binarylog.proto
   ${WORKDIR}/grpc-proto/grpc/channelz/v1/channelz.proto
@@ -73,16 +74,29 @@ SOURCES=(
   ${WORKDIR}/grpc-proto/grpc/service_config/service_config.proto
   ${WORKDIR}/grpc-proto/grpc/tls/provider/meshca/experimental/config.proto
   ${WORKDIR}/istio/istio/google/security/meshca/v1/meshca.proto
-  $(git ls-files --exclude-standard --cached --others "*.proto")
+  profiling/proto/service.proto
+  reflection/grpc_reflection_v1alpha/reflection.proto
 )
+
+# Generates only the new gRPC Service symbols
+SOURCES=(
+  $(git ls-files --exclude-standard --cached --others "*.proto" | grep -v '^\(profiling/proto/service.proto\|reflection/grpc_reflection_v1alpha/reflection.proto\)$')
+)
+
 # These options of the form 'Mfoo.proto=bar' instruct the codegen to use an
 # import path of 'bar' in the generated code when 'foo.proto' is imported in
 # one of the sources.
 OPTS=Mgrpc/service_config/service_config.proto=/internal/proto/grpc_service_config,\
 Menvoy/config/core/v3/config_source.proto=github.com/envoyproxy/go-control-plane/envoy/config/core/v3
+
 for src in ${SOURCES[@]}; do
   echo "protoc ${src}"
-  protoc --go_out=${OPTS}:${WORKDIR}/out --go-grpc_out=${OPTS},requireUnimplementedServers=false:${WORKDIR}/out \
+  protoc --go_out=${OPTS}:${WORKDIR}/out --go-grpc_out=${OPTS}:${WORKDIR}/out ${src}
+done
+
+for src in ${LEGACY_SOURCES[@]}; do
+  echo "protoc ${src}"
+  protoc --go_out=${OPTS},plugins=grpc:${WORKDIR}/out --go-grpc_out=${OPTS},migration_mode=true:${WORKDIR}/out \
     -I"." \
     -I${WORKDIR}/grpc-proto \
     -I${WORKDIR}/googleapis \

server.go

@@ -554,12 +554,15 @@ type ServiceRegistrar interface {
 
 // RegisterService registers a service and its implementation to the gRPC
 // server. It is called from the IDL generated code. This must be called before
-// invoking Serve.
+// invoking Serve. If ss is non-nil (for legacy code), its type is checked to
+// ensure it implements sd.HandlerType.
 func (s *Server) RegisterService(sd *ServiceDesc, ss interface{}) {
-	ht := reflect.TypeOf(sd.HandlerType).Elem()
-	st := reflect.TypeOf(ss)
-	if !st.Implements(ht) {
-		logger.Fatalf("grpc: Server.RegisterService found the handler of type %v that does not satisfy %v", st, ht)
+	if ss != nil {
+		ht := reflect.TypeOf(sd.HandlerType).Elem()
+		st := reflect.TypeOf(ss)
+		if !st.Implements(ht) {
+			logger.Fatalf("grpc: Server.RegisterService found the handler of type %v that does not satisfy %v", st, ht)
+		}
 	}
 	s.register(sd, ss)
 }

stats/grpc_testing/test_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // TestServiceClient is the client API for TestService service.
 //
@@ -38,6 +38,10 @@ func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
 	return &testServiceClient{cc}
 }
 
+var testServiceUnaryCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "UnaryCall",
+}
+
 func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
 	out := new(SimpleResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.TestService/UnaryCall", in, out, opts...)
@@ -47,8 +51,14 @@ func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, op
 	return out, nil
 }
 
+var testServiceFullDuplexCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "FullDuplexCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[0], "/grpc.testing.TestService/FullDuplexCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceFullDuplexCallStreamDesc, "/grpc.testing.TestService/FullDuplexCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -78,8 +88,13 @@ func (x *testServiceFullDuplexCallClient) Recv() (*SimpleResponse, error) {
 	return m, nil
 }
 
+var testServiceClientStreamCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "ClientStreamCall",
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) ClientStreamCall(ctx context.Context, opts ...grpc.CallOption) (TestService_ClientStreamCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[1], "/grpc.testing.TestService/ClientStreamCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceClientStreamCallStreamDesc, "/grpc.testing.TestService/ClientStreamCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -112,8 +127,13 @@ func (x *testServiceClientStreamCallClient) CloseAndRecv() (*SimpleResponse, err
 	return m, nil
 }
 
+var testServiceServerStreamCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "ServerStreamCall",
+	ServerStreams: true,
+}
+
 func (c *testServiceClient) ServerStreamCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (TestService_ServerStreamCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[2], "/grpc.testing.TestService/ServerStreamCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceServerStreamCallStreamDesc, "/grpc.testing.TestService/ServerStreamCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -144,64 +164,65 @@ func (x *testServiceServerStreamCallClient) Recv() (*SimpleResponse, error) {
 	return m, nil
 }
 
-// TestServiceServer is the server API for TestService service.
-// All implementations should embed UnimplementedTestServiceServer
-// for forward compatibility
-type TestServiceServer interface {
+// TestServiceService is the service API for TestService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterTestServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type TestServiceService struct {
 	// One request followed by one response.
 	// The server returns the client id as-is.
-	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	UnaryCall func(context.Context, *SimpleRequest) (*SimpleResponse, error)
 	// A sequence of requests with each request served by the server immediately.
 	// As one request could lead to multiple responses, this interface
 	// demonstrates the idea of full duplexing.
-	FullDuplexCall(TestService_FullDuplexCallServer) error
+	FullDuplexCall func(TestService_FullDuplexCallServer) error
 	// Client stream
-	ClientStreamCall(TestService_ClientStreamCallServer) error
+	ClientStreamCall func(TestService_ClientStreamCallServer) error
 	// Server stream
-	ServerStreamCall(*SimpleRequest, TestService_ServerStreamCallServer) error
+	ServerStreamCall func(*SimpleRequest, TestService_ServerStreamCallServer) error
 }
 
-// UnimplementedTestServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedTestServiceServer struct {
-}
-
-func (*UnimplementedTestServiceServer) UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
-}
-func (*UnimplementedTestServiceServer) FullDuplexCall(TestService_FullDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
-}
-func (*UnimplementedTestServiceServer) ClientStreamCall(TestService_ClientStreamCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method ClientStreamCall not implemented")
-}
-func (*UnimplementedTestServiceServer) ServerStreamCall(*SimpleRequest, TestService_ServerStreamCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method ServerStreamCall not implemented")
-}
-
-func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
-	s.RegisterService(&_TestService_serviceDesc, srv)
-}
-
-func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *TestServiceService) unaryCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.UnaryCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
+	}
 	in := new(SimpleRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(TestServiceServer).UnaryCall(ctx, in)
+		return s.UnaryCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.TestService/UnaryCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+		return s.UnaryCall(ctx, req.(*SimpleRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+func (s *TestServiceService) fullDuplexCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.FullDuplexCall == nil {
+		return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
+	}
+	return s.FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+func (s *TestServiceService) clientStreamCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.ClientStreamCall == nil {
+		return status.Errorf(codes.Unimplemented, "method ClientStreamCall not implemented")
+	}
+	return s.ClientStreamCall(&testServiceClientStreamCallServer{stream})
+}
+func (s *TestServiceService) serverStreamCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.ServerStreamCall == nil {
+		return status.Errorf(codes.Unimplemented, "method ServerStreamCall not implemented")
+	}
+	m := new(SimpleRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return s.ServerStreamCall(m, &testServiceServerStreamCallServer{stream})
 }
 
 type TestService_FullDuplexCallServer interface {
@@ -226,10 +247,6 @@ func (x *testServiceFullDuplexCallServer) Recv() (*SimpleRequest, error) {
 	return m, nil
 }
 
-func _TestService_ClientStreamCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).ClientStreamCall(&testServiceClientStreamCallServer{stream})
-}
-
 type TestService_ClientStreamCallServer interface {
 	SendAndClose(*SimpleResponse) error
 	Recv() (*SimpleRequest, error)
@@ -252,14 +269,6 @@ func (x *testServiceClientStreamCallServer) Recv() (*SimpleRequest, error) {
 	return m, nil
 }
 
-func _TestService_ServerStreamCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(SimpleRequest)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(TestServiceServer).ServerStreamCall(m, &testServiceServerStreamCallServer{stream})
-}
-
 type TestService_ServerStreamCallServer interface {
 	Send(*SimpleResponse) error
 	grpc.ServerStream
@@ -273,32 +282,85 @@ func (x *testServiceServerStreamCallServer) Send(m *SimpleResponse) error {
 	return x.ServerStream.SendMsg(m)
 }
 
-var _TestService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.TestService",
-	HandlerType: (*TestServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "UnaryCall",
-			Handler:    _TestService_UnaryCall_Handler,
+// RegisterTestServiceService registers a service implementation with a gRPC server.
+func RegisterTestServiceService(s grpc.ServiceRegistrar, srv *TestServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.TestService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "UnaryCall",
+				Handler:    srv.unaryCall,
+			},
 		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "FullDuplexCall",
-			Handler:       _TestService_FullDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "FullDuplexCall",
+				Handler:       srv.fullDuplexCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "ClientStreamCall",
+				Handler:       srv.clientStreamCall,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "ServerStreamCall",
+				Handler:       srv.serverStreamCall,
+				ServerStreams: true,
+			},
 		},
-		{
-			StreamName:    "ClientStreamCall",
-			Handler:       _TestService_ClientStreamCall_Handler,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "ServerStreamCall",
-			Handler:       _TestService_ServerStreamCall_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "stats/grpc_testing/test.proto",
+		Metadata: "stats/grpc_testing/test.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewTestServiceService creates a new TestServiceService containing the
+// implemented methods of the TestService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewTestServiceService(s interface{}) *TestServiceService {
+	ns := &TestServiceService{}
+	if h, ok := s.(interface {
+		UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	}); ok {
+		ns.UnaryCall = h.UnaryCall
+	}
+	if h, ok := s.(interface {
+		FullDuplexCall(TestService_FullDuplexCallServer) error
+	}); ok {
+		ns.FullDuplexCall = h.FullDuplexCall
+	}
+	if h, ok := s.(interface {
+		ClientStreamCall(TestService_ClientStreamCallServer) error
+	}); ok {
+		ns.ClientStreamCall = h.ClientStreamCall
+	}
+	if h, ok := s.(interface {
+		ServerStreamCall(*SimpleRequest, TestService_ServerStreamCallServer) error
+	}); ok {
+		ns.ServerStreamCall = h.ServerStreamCall
+	}
+	return ns
+}
+
+// UnstableTestServiceService is the service API for TestService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableTestServiceService interface {
+	// One request followed by one response.
+	// The server returns the client id as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+	// Client stream
+	ClientStreamCall(TestService_ClientStreamCallServer) error
+	// Server stream
+	ServerStreamCall(*SimpleRequest, TestService_ServerStreamCallServer) error
 }

stats/stats_test.go

@@ -73,9 +73,9 @@ var (
 	errorID int32 = 32202
 )
 
-type testServer struct {
-	testpb.UnimplementedTestServiceServer
-}
+type testServer struct{}
+
+var _ testpb.UnstableTestServiceService = (*testServer)(nil)
 
 func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
 	if err := grpc.SendHeader(ctx, testHeaderMetadata); err != nil {
@@ -165,7 +165,7 @@ type test struct {
 	clientStatsHandler stats.Handler
 	serverStatsHandler stats.Handler
 
-	testServer testpb.TestServiceServer // nil means none
+	testService *testpb.TestServiceService // nil means none
 	// srv and srvAddr are set once startServer is called.
 	srv     *grpc.Server
 	srvAddr string
@@ -200,8 +200,8 @@ func newTest(t *testing.T, tc *testConfig, ch stats.Handler, sh stats.Handler) *
 
 // startServer starts a gRPC server listening. Callers should defer a
 // call to te.tearDown to clean up.
-func (te *test) startServer(ts testpb.TestServiceServer) {
-	te.testServer = ts
+func (te *test) startServer(ts *testpb.TestServiceService) {
+	te.testService = ts
 	lis, err := net.Listen("tcp", "localhost:0")
 	if err != nil {
 		te.t.Fatalf("Failed to listen: %v", err)
@@ -218,8 +218,8 @@ func (te *test) startServer(ts testpb.TestServiceServer) {
 	}
 	s := grpc.NewServer(opts...)
 	te.srv = s
-	if te.testServer != nil {
-		testpb.RegisterTestServiceServer(s, te.testServer)
+	if te.testService != nil {
+		testpb.RegisterTestServiceService(s, te.testService)
 	}
 
 	go s.Serve(lis)
@@ -815,7 +815,7 @@ func checkServerStats(t *testing.T, got []*gotData, expect *expectedData, checkF
 func testServerStats(t *testing.T, tc *testConfig, cc *rpcConfig, checkFuncs []func(t *testing.T, d *gotData, e *expectedData)) {
 	h := &statshandler{}
 	te := newTest(t, tc, nil, h)
-	te.startServer(&testServer{})
+	te.startServer(testpb.NewTestServiceService(&testServer{}))
 	defer te.tearDown()
 
 	var (
@@ -1106,7 +1106,7 @@ func checkClientStats(t *testing.T, got []*gotData, expect *expectedData, checkF
 func testClientStats(t *testing.T, tc *testConfig, cc *rpcConfig, checkFuncs map[int]*checkFuncWithCount) {
 	h := &statshandler{}
 	te := newTest(t, tc, h, nil)
-	te.startServer(&testServer{})
+	te.startServer(testpb.NewTestServiceService(&testServer{}))
 	defer te.tearDown()
 
 	var (

stress/client/main.go

@@ -146,12 +146,13 @@ func (g *gauge) get() int64 {
 
 // server implements metrics server functions.
 type server struct {
-	metricspb.UnimplementedMetricsServiceServer
 	mutex sync.RWMutex
 	// gauges is a map from /stress_test/server_<n>/channel_<n>/stub_<n>/qps to its qps gauge.
 	gauges map[string]*gauge
 }
 
+var _ metricspb.UnstableMetricsServiceService = (*server)(nil)
+
 // newMetricsServer returns a new metrics server.
 func newMetricsServer() *server {
 	return &server{gauges: make(map[string]*gauge)}
@@ -202,7 +203,7 @@ func startServer(server *server, port int) {
 	}
 
 	s := grpc.NewServer()
-	metricspb.RegisterMetricsServiceServer(s, server)
+	metricspb.RegisterMetricsServiceService(s, metricspb.NewMetricsServiceService(server))
 	s.Serve(lis)
 
 }

stress/grpc_testing/metrics_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // MetricsServiceClient is the client API for MetricsService service.
 //
@@ -32,8 +32,13 @@ func NewMetricsServiceClient(cc grpc.ClientConnInterface) MetricsServiceClient {
 	return &metricsServiceClient{cc}
 }
 
+var metricsServiceGetAllGaugesStreamDesc = &grpc.StreamDesc{
+	StreamName:    "GetAllGauges",
+	ServerStreams: true,
+}
+
 func (c *metricsServiceClient) GetAllGauges(ctx context.Context, in *EmptyMessage, opts ...grpc.CallOption) (MetricsService_GetAllGaugesClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_MetricsService_serviceDesc.Streams[0], "/grpc.testing.MetricsService/GetAllGauges", opts...)
+	stream, err := c.cc.NewStream(ctx, metricsServiceGetAllGaugesStreamDesc, "/grpc.testing.MetricsService/GetAllGauges", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -64,6 +69,10 @@ func (x *metricsServiceGetAllGaugesClient) Recv() (*GaugeResponse, error) {
 	return m, nil
 }
 
+var metricsServiceGetGaugeStreamDesc = &grpc.StreamDesc{
+	StreamName: "GetGauge",
+}
+
 func (c *metricsServiceClient) GetGauge(ctx context.Context, in *GaugeRequest, opts ...grpc.CallOption) (*GaugeResponse, error) {
 	out := new(GaugeResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.MetricsService/GetGauge", in, out, opts...)
@@ -73,38 +82,47 @@ func (c *metricsServiceClient) GetGauge(ctx context.Context, in *GaugeRequest, o
 	return out, nil
 }
 
-// MetricsServiceServer is the server API for MetricsService service.
-// All implementations should embed UnimplementedMetricsServiceServer
-// for forward compatibility
-type MetricsServiceServer interface {
+// MetricsServiceService is the service API for MetricsService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterMetricsServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type MetricsServiceService struct {
 	// Returns the values of all the gauges that are currently being maintained by
 	// the service
-	GetAllGauges(*EmptyMessage, MetricsService_GetAllGaugesServer) error
+	GetAllGauges func(*EmptyMessage, MetricsService_GetAllGaugesServer) error
 	// Returns the value of one gauge
-	GetGauge(context.Context, *GaugeRequest) (*GaugeResponse, error)
+	GetGauge func(context.Context, *GaugeRequest) (*GaugeResponse, error)
 }
 
-// UnimplementedMetricsServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedMetricsServiceServer struct {
-}
-
-func (*UnimplementedMetricsServiceServer) GetAllGauges(*EmptyMessage, MetricsService_GetAllGaugesServer) error {
-	return status.Errorf(codes.Unimplemented, "method GetAllGauges not implemented")
-}
-func (*UnimplementedMetricsServiceServer) GetGauge(context.Context, *GaugeRequest) (*GaugeResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetGauge not implemented")
-}
-
-func RegisterMetricsServiceServer(s *grpc.Server, srv MetricsServiceServer) {
-	s.RegisterService(&_MetricsService_serviceDesc, srv)
-}
-
-func _MetricsService_GetAllGauges_Handler(srv interface{}, stream grpc.ServerStream) error {
+func (s *MetricsServiceService) getAllGauges(_ interface{}, stream grpc.ServerStream) error {
+	if s.GetAllGauges == nil {
+		return status.Errorf(codes.Unimplemented, "method GetAllGauges not implemented")
+	}
 	m := new(EmptyMessage)
 	if err := stream.RecvMsg(m); err != nil {
 		return err
 	}
-	return srv.(MetricsServiceServer).GetAllGauges(m, &metricsServiceGetAllGaugesServer{stream})
+	return s.GetAllGauges(m, &metricsServiceGetAllGaugesServer{stream})
+}
+func (s *MetricsServiceService) getGauge(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.GetGauge == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method GetGauge not implemented")
+	}
+	in := new(GaugeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return s.GetGauge(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     s,
+		FullMethod: "/grpc.testing.MetricsService/GetGauge",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return s.GetGauge(ctx, req.(*GaugeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
 }
 
 type MetricsService_GetAllGaugesServer interface {
@@ -120,39 +138,58 @@ func (x *metricsServiceGetAllGaugesServer) Send(m *GaugeResponse) error {
 	return x.ServerStream.SendMsg(m)
 }
 
-func _MetricsService_GetGauge_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GaugeRequest)
-	if err := dec(in); err != nil {
-		return nil, err
+// RegisterMetricsServiceService registers a service implementation with a gRPC server.
+func RegisterMetricsServiceService(s grpc.ServiceRegistrar, srv *MetricsServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.MetricsService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "GetGauge",
+				Handler:    srv.getGauge,
+			},
+		},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "GetAllGauges",
+				Handler:       srv.getAllGauges,
+				ServerStreams: true,
+			},
+		},
+		Metadata: "stress/grpc_testing/metrics.proto",
 	}
-	if interceptor == nil {
-		return srv.(MetricsServiceServer).GetGauge(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/grpc.testing.MetricsService/GetGauge",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(MetricsServiceServer).GetGauge(ctx, req.(*GaugeRequest))
-	}
-	return interceptor(ctx, in, info, handler)
+
+	s.RegisterService(&sd, nil)
 }
 
-var _MetricsService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.MetricsService",
-	HandlerType: (*MetricsServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "GetGauge",
-			Handler:    _MetricsService_GetGauge_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "GetAllGauges",
-			Handler:       _MetricsService_GetAllGauges_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "stress/grpc_testing/metrics.proto",
+// NewMetricsServiceService creates a new MetricsServiceService containing the
+// implemented methods of the MetricsService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewMetricsServiceService(s interface{}) *MetricsServiceService {
+	ns := &MetricsServiceService{}
+	if h, ok := s.(interface {
+		GetAllGauges(*EmptyMessage, MetricsService_GetAllGaugesServer) error
+	}); ok {
+		ns.GetAllGauges = h.GetAllGauges
+	}
+	if h, ok := s.(interface {
+		GetGauge(context.Context, *GaugeRequest) (*GaugeResponse, error)
+	}); ok {
+		ns.GetGauge = h.GetGauge
+	}
+	return ns
+}
+
+// UnstableMetricsServiceService is the service API for MetricsService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableMetricsServiceService interface {
+	// Returns the values of all the gauges that are currently being maintained by
+	// the service
+	GetAllGauges(*EmptyMessage, MetricsService_GetAllGaugesServer) error
+	// Returns the value of one gauge
+	GetGauge(context.Context, *GaugeRequest) (*GaugeResponse, error)
 }

test/balancer_test.go

@@ -498,7 +498,7 @@ func (s) TestAddressAttributesInNewSubConn(t *testing.T) {
 	}
 
 	s := grpc.NewServer()
-	testpb.RegisterTestServiceServer(s, &testServer{})
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(&testServer{}))
 	go s.Serve(lis)
 	defer s.Stop()
 	t.Logf("Started gRPC server at %s...", lis.Addr().String())
@@ -561,7 +561,7 @@ func (s) TestServersSwap(t *testing.T) {
 				return &testpb.SimpleResponse{Username: username}, nil
 			},
 		}
-		testpb.RegisterTestServiceServer(s, ts)
+		testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ts))
 		go s.Serve(lis)
 		return lis.Addr().String(), s.Stop
 	}
@@ -621,7 +621,7 @@ func (s) TestEmptyAddrs(t *testing.T) {
 			return &testpb.SimpleResponse{Username: one}, nil
 		},
 	}
-	testpb.RegisterTestServiceServer(s, ts)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ts))
 	go s.Serve(lis)
 
 	// Initialize pickfirst client
@@ -710,7 +710,7 @@ func (s) TestWaitForReady(t *testing.T) {
 			return &testpb.SimpleResponse{Username: one}, nil
 		},
 	}
-	testpb.RegisterTestServiceServer(s, ts)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ts))
 	go s.Serve(lis)
 
 	// Initialize client

test/end2end_test.go

@@ -126,8 +126,6 @@ var (
 var raceMode bool // set by race.go in race mode
 
 type testServer struct {
-	testpb.UnimplementedTestServiceServer
-
 	security           string // indicate the authentication protocol used by this server.
 	earlyFail          bool   // whether to error out the execution of a service handler prematurely.
 	setAndSendHeader   bool   // whether to call setHeader and sendHeader.
@@ -136,6 +134,8 @@ type testServer struct {
 	unaryCallSleepTime time.Duration
 }
 
+var _ testpb.UnstableTestServiceService = (*testServer)(nil)
+
 func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
 	if md, ok := metadata.FromIncomingContext(ctx); ok {
 		// For testing purpose, returns an error if user-agent is failAppUA.
@@ -566,7 +566,7 @@ func newTest(t *testing.T, e env) *test {
 	return te
 }
 
-func (te *test) listenAndServe(ts testpb.TestServiceServer, listen func(network, address string) (net.Listener, error)) net.Listener {
+func (te *test) listenAndServe(ts interface{}, listen func(network, address string) (net.Listener, error)) net.Listener {
 	te.t.Helper()
 	te.t.Logf("Running test in %s environment...", te.e.name)
 	sopts := []grpc.ServerOption{grpc.MaxConcurrentStreams(te.maxStream)}
@@ -626,7 +626,7 @@ func (te *test) listenAndServe(ts testpb.TestServiceServer, listen func(network,
 	sopts = append(sopts, te.customServerOptions...)
 	s := grpc.NewServer(sopts...)
 	if ts != nil {
-		testpb.RegisterTestServiceServer(s, ts)
+		testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ts))
 	}
 
 	// Create a new default health server if enableHealthServer is set, or use
@@ -691,20 +691,20 @@ func (w wrapHS) Stop() {
 	w.s.Close()
 }
 
-func (te *test) startServerWithConnControl(ts testpb.TestServiceServer) *listenerWrapper {
+func (te *test) startServerWithConnControl(ts interface{}) *listenerWrapper {
 	l := te.listenAndServe(ts, listenWithConnControl)
 	return l.(*listenerWrapper)
 }
 
 // startServer starts a gRPC server exposing the provided TestService
 // implementation. Callers should defer a call to te.tearDown to clean up
-func (te *test) startServer(ts testpb.TestServiceServer) {
+func (te *test) startServer(ts interface{}) {
 	te.t.Helper()
 	te.listenAndServe(ts, net.Listen)
 }
 
 // startServers starts 'num' gRPC servers exposing the provided TestService.
-func (te *test) startServers(ts testpb.TestServiceServer, num int) {
+func (te *test) startServers(ts interface{}, num int) {
 	for i := 0; i < num; i++ {
 		te.startServer(ts)
 		te.srvs = append(te.srvs, te.srv.(*grpc.Server))
@@ -3892,15 +3892,13 @@ func equalError(x, y error) bool {
 	return x == y || (x != nil && y != nil && x.Error() == y.Error())
 }
 
-// concurrentSendServer is a TestServiceServer whose
+// concurrentSendServer is a TestServiceService whose
 // StreamingOutputCall makes ten serial Send calls, sending payloads
 // "0".."9", inclusive.  TestServerStreamingConcurrent verifies they
 // were received in the correct order, and that there were no races.
 //
-// All other TestServiceServer methods crash if called.
-type concurrentSendServer struct {
-	testpb.TestServiceServer
-}
+// All other TestServiceService methods return unimplemented if called.
+type concurrentSendServer struct{}
 
 func (s concurrentSendServer) StreamingOutputCall(args *testpb.StreamingOutputCallRequest, stream testpb.TestService_StreamingOutputCallServer) error {
 	for i := 0; i < 10; i++ {
@@ -4496,12 +4494,11 @@ func testStreamServerInterceptor(t *testing.T, e env) {
 	}
 }
 
-// funcServer implements methods of TestServiceServer using funcs,
+// funcServer implements methods of TestServiceService using funcs,
 // similar to an http.HandlerFunc.
-// Any unimplemented method will crash. Tests implement the method(s)
+// Any unimplemented method will return unimplemented. Tests implement the method(s)
 // they need.
 type funcServer struct {
-	testpb.TestServiceServer
 	unaryCall          func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error)
 	streamingInputCall func(stream testpb.TestService_StreamingInputCallServer) error
 	fullDuplexCall     func(stream testpb.TestService_FullDuplexCallServer) error
@@ -4872,10 +4869,10 @@ func (s) TestFlowControlLogicalRace(t *testing.T) {
 	defer lis.Close()
 
 	s := grpc.NewServer()
-	testpb.RegisterTestServiceServer(s, &flowControlLogicalRaceServer{
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(&flowControlLogicalRaceServer{
 		itemCount: itemCount,
 		itemSize:  itemSize,
-	})
+	}))
 	defer s.Stop()
 
 	go s.Serve(lis)
@@ -4929,8 +4926,6 @@ func (s) TestFlowControlLogicalRace(t *testing.T) {
 }
 
 type flowControlLogicalRaceServer struct {
-	testpb.TestServiceServer
-
 	itemSize  int
 	itemCount int
 }
@@ -5077,9 +5072,6 @@ func (fw *filterWriter) Write(p []byte) (n int, err error) {
 // stubServer is a server that is easy to customize within individual test
 // cases.
 type stubServer struct {
-	// Guarantees we satisfy this interface; panics if unimplemented methods are called.
-	testpb.TestServiceServer
-
 	// Customizable implementations of server handlers.
 	emptyCall      func(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error)
 	unaryCall      func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error)
@@ -5133,7 +5125,7 @@ func (ss *stubServer) Start(sopts []grpc.ServerOption, dopts ...grpc.DialOption)
 	ss.cleanups = append(ss.cleanups, func() { lis.Close() })
 
 	s := grpc.NewServer(sopts...)
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 	go s.Serve(lis)
 	ss.cleanups = append(ss.cleanups, s.Stop)
 	ss.s = s
@@ -6276,7 +6268,7 @@ func (s) TestServeExitsWhenListenerClosed(t *testing.T) {
 
 	s := grpc.NewServer()
 	defer s.Stop()
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 
 	lis, err := net.Listen("tcp", "localhost:0")
 	if err != nil {
@@ -6495,7 +6487,7 @@ func (s) TestDisabledIOBuffers(t *testing.T) {
 	}
 
 	s := grpc.NewServer(grpc.WriteBufferSize(0), grpc.ReadBufferSize(0))
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 
 	lis, err := net.Listen("tcp", "localhost:0")
 	if err != nil {
@@ -6708,7 +6700,7 @@ func (s) TestNetPipeConn(t *testing.T) {
 	ts := &funcServer{unaryCall: func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
 		return &testpb.SimpleResponse{}, nil
 	}}
-	testpb.RegisterTestServiceServer(s, ts)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ts))
 	go s.Serve(pl)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
@@ -6791,7 +6783,7 @@ func (s) TestGoAwayThenClose(t *testing.T) {
 			return err
 		},
 	}
-	testpb.RegisterTestServiceServer(s1, ts)
+	testpb.RegisterTestServiceService(s1, testpb.NewTestServiceService(ts))
 	go s1.Serve(lis1)
 
 	conn2Established := grpcsync.NewEvent()
@@ -6801,7 +6793,7 @@ func (s) TestGoAwayThenClose(t *testing.T) {
 	}
 	s2 := grpc.NewServer()
 	defer s2.Stop()
-	testpb.RegisterTestServiceServer(s2, ts)
+	testpb.RegisterTestServiceService(s2, testpb.NewTestServiceService(ts))
 	go s2.Serve(lis2)
 
 	r := manual.NewBuilderWithScheme("whatever")

test/goaway_test.go

@@ -48,7 +48,7 @@ func (s) TestGracefulClientOnGoAway(t *testing.T) {
 
 	s := grpc.NewServer(grpc.KeepaliveParams(keepalive.ServerParameters{MaxConnectionAge: maxConnAge}))
 	defer s.Stop()
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 
 	lis, err := net.Listen("tcp", "localhost:0")
 	if err != nil {

test/gracefulstop_test.go

@@ -117,7 +117,7 @@ func (s) TestGracefulStop(t *testing.T) {
 		},
 	}
 	s := grpc.NewServer()
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 
 	// 1. Start Server
 	wg := sync.WaitGroup{}

test/grpc_testing/test_grpc.pb.go

@@ -11,7 +11,7 @@ import (
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion6
+const _ = grpc.SupportPackageIsVersion7
 
 // TestServiceClient is the client API for TestService service.
 //
@@ -47,6 +47,10 @@ func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
 	return &testServiceClient{cc}
 }
 
+var testServiceEmptyCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "EmptyCall",
+}
+
 func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
 	out := new(Empty)
 	err := c.cc.Invoke(ctx, "/grpc.testing.TestService/EmptyCall", in, out, opts...)
@@ -56,6 +60,10 @@ func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...gr
 	return out, nil
 }
 
+var testServiceUnaryCallStreamDesc = &grpc.StreamDesc{
+	StreamName: "UnaryCall",
+}
+
 func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
 	out := new(SimpleResponse)
 	err := c.cc.Invoke(ctx, "/grpc.testing.TestService/UnaryCall", in, out, opts...)
@@ -65,8 +73,13 @@ func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, op
 	return out, nil
 }
 
+var testServiceStreamingOutputCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "StreamingOutputCall",
+	ServerStreams: true,
+}
+
 func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[0], "/grpc.testing.TestService/StreamingOutputCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceStreamingOutputCallStreamDesc, "/grpc.testing.TestService/StreamingOutputCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -97,8 +110,13 @@ func (x *testServiceStreamingOutputCallClient) Recv() (*StreamingOutputCallRespo
 	return m, nil
 }
 
+var testServiceStreamingInputCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "StreamingInputCall",
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[1], "/grpc.testing.TestService/StreamingInputCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceStreamingInputCallStreamDesc, "/grpc.testing.TestService/StreamingInputCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -131,8 +149,14 @@ func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*StreamingInputCal
 	return m, nil
 }
 
+var testServiceFullDuplexCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "FullDuplexCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[2], "/grpc.testing.TestService/FullDuplexCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceFullDuplexCallStreamDesc, "/grpc.testing.TestService/FullDuplexCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -162,8 +186,14 @@ func (x *testServiceFullDuplexCallClient) Recv() (*StreamingOutputCallResponse,
 	return m, nil
 }
 
+var testServiceHalfDuplexCallStreamDesc = &grpc.StreamDesc{
+	StreamName:    "HalfDuplexCall",
+	ServerStreams: true,
+	ClientStreams: true,
+}
+
 func (c *testServiceClient) HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_TestService_serviceDesc.Streams[3], "/grpc.testing.TestService/HalfDuplexCall", opts...)
+	stream, err := c.cc.NewStream(ctx, testServiceHalfDuplexCallStreamDesc, "/grpc.testing.TestService/HalfDuplexCall", opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -193,101 +223,100 @@ func (x *testServiceHalfDuplexCallClient) Recv() (*StreamingOutputCallResponse,
 	return m, nil
 }
 
-// TestServiceServer is the server API for TestService service.
-// All implementations should embed UnimplementedTestServiceServer
-// for forward compatibility
-type TestServiceServer interface {
+// TestServiceService is the service API for TestService service.
+// Fields should be assigned to their respective handler implementations only before
+// RegisterTestServiceService is called.  Any unassigned fields will result in the
+// handler for that method returning an Unimplemented error.
+type TestServiceService struct {
 	// One empty request followed by one empty response.
-	EmptyCall(context.Context, *Empty) (*Empty, error)
+	EmptyCall func(context.Context, *Empty) (*Empty, error)
 	// One request followed by one response.
 	// The server returns the client payload as-is.
-	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	UnaryCall func(context.Context, *SimpleRequest) (*SimpleResponse, error)
 	// One request followed by a sequence of responses (streamed download).
 	// The server returns the payload with client desired type and sizes.
-	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	StreamingOutputCall func(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
 	// A sequence of requests followed by one response (streamed upload).
 	// The server returns the aggregated size of client payload as the result.
-	StreamingInputCall(TestService_StreamingInputCallServer) error
+	StreamingInputCall func(TestService_StreamingInputCallServer) error
 	// A sequence of requests with each request served by the server immediately.
 	// As one request could lead to multiple responses, this interface
 	// demonstrates the idea of full duplexing.
-	FullDuplexCall(TestService_FullDuplexCallServer) error
+	FullDuplexCall func(TestService_FullDuplexCallServer) error
 	// A sequence of requests followed by a sequence of responses.
 	// The server buffers all the client requests and then serves them in order. A
 	// stream of responses are returned to the client when the server starts with
 	// first request.
-	HalfDuplexCall(TestService_HalfDuplexCallServer) error
+	HalfDuplexCall func(TestService_HalfDuplexCallServer) error
 }
 
-// UnimplementedTestServiceServer should be embedded to have forward compatible implementations.
-type UnimplementedTestServiceServer struct {
-}
-
-func (*UnimplementedTestServiceServer) EmptyCall(context.Context, *Empty) (*Empty, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method EmptyCall not implemented")
-}
-func (*UnimplementedTestServiceServer) UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
-}
-func (*UnimplementedTestServiceServer) StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingOutputCall not implemented")
-}
-func (*UnimplementedTestServiceServer) StreamingInputCall(TestService_StreamingInputCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method StreamingInputCall not implemented")
-}
-func (*UnimplementedTestServiceServer) FullDuplexCall(TestService_FullDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
-}
-func (*UnimplementedTestServiceServer) HalfDuplexCall(TestService_HalfDuplexCallServer) error {
-	return status.Errorf(codes.Unimplemented, "method HalfDuplexCall not implemented")
-}
-
-func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
-	s.RegisterService(&_TestService_serviceDesc, srv)
-}
-
-func _TestService_EmptyCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *TestServiceService) emptyCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.EmptyCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method EmptyCall not implemented")
+	}
 	in := new(Empty)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(TestServiceServer).EmptyCall(ctx, in)
+		return s.EmptyCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.TestService/EmptyCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).EmptyCall(ctx, req.(*Empty))
+		return s.EmptyCall(ctx, req.(*Empty))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func (s *TestServiceService) unaryCall(_ interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	if s.UnaryCall == nil {
+		return nil, status.Errorf(codes.Unimplemented, "method UnaryCall not implemented")
+	}
 	in := new(SimpleRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(TestServiceServer).UnaryCall(ctx, in)
+		return s.UnaryCall(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
-		Server:     srv,
+		Server:     s,
 		FullMethod: "/grpc.testing.TestService/UnaryCall",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+		return s.UnaryCall(ctx, req.(*SimpleRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
-
-func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+func (s *TestServiceService) streamingOutputCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.StreamingOutputCall == nil {
+		return status.Errorf(codes.Unimplemented, "method StreamingOutputCall not implemented")
+	}
 	m := new(StreamingOutputCallRequest)
 	if err := stream.RecvMsg(m); err != nil {
 		return err
 	}
-	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+	return s.StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+}
+func (s *TestServiceService) streamingInputCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.StreamingInputCall == nil {
+		return status.Errorf(codes.Unimplemented, "method StreamingInputCall not implemented")
+	}
+	return s.StreamingInputCall(&testServiceStreamingInputCallServer{stream})
+}
+func (s *TestServiceService) fullDuplexCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.FullDuplexCall == nil {
+		return status.Errorf(codes.Unimplemented, "method FullDuplexCall not implemented")
+	}
+	return s.FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+func (s *TestServiceService) halfDuplexCall(_ interface{}, stream grpc.ServerStream) error {
+	if s.HalfDuplexCall == nil {
+		return status.Errorf(codes.Unimplemented, "method HalfDuplexCall not implemented")
+	}
+	return s.HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
 }
 
 type TestService_StreamingOutputCallServer interface {
@@ -303,10 +332,6 @@ func (x *testServiceStreamingOutputCallServer) Send(m *StreamingOutputCallRespon
 	return x.ServerStream.SendMsg(m)
 }
 
-func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
-}
-
 type TestService_StreamingInputCallServer interface {
 	SendAndClose(*StreamingInputCallResponse) error
 	Recv() (*StreamingInputCallRequest, error)
@@ -329,10 +354,6 @@ func (x *testServiceStreamingInputCallServer) Recv() (*StreamingInputCallRequest
 	return m, nil
 }
 
-func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
-}
-
 type TestService_FullDuplexCallServer interface {
 	Send(*StreamingOutputCallResponse) error
 	Recv() (*StreamingOutputCallRequest, error)
@@ -355,10 +376,6 @@ func (x *testServiceFullDuplexCallServer) Recv() (*StreamingOutputCallRequest, e
 	return m, nil
 }
 
-func _TestService_HalfDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(TestServiceServer).HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
-}
-
 type TestService_HalfDuplexCallServer interface {
 	Send(*StreamingOutputCallResponse) error
 	Recv() (*StreamingOutputCallRequest, error)
@@ -381,42 +398,114 @@ func (x *testServiceHalfDuplexCallServer) Recv() (*StreamingOutputCallRequest, e
 	return m, nil
 }
 
-var _TestService_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "grpc.testing.TestService",
-	HandlerType: (*TestServiceServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "EmptyCall",
-			Handler:    _TestService_EmptyCall_Handler,
+// RegisterTestServiceService registers a service implementation with a gRPC server.
+func RegisterTestServiceService(s grpc.ServiceRegistrar, srv *TestServiceService) {
+	sd := grpc.ServiceDesc{
+		ServiceName: "grpc.testing.TestService",
+		Methods: []grpc.MethodDesc{
+			{
+				MethodName: "EmptyCall",
+				Handler:    srv.emptyCall,
+			},
+			{
+				MethodName: "UnaryCall",
+				Handler:    srv.unaryCall,
+			},
 		},
-		{
-			MethodName: "UnaryCall",
-			Handler:    _TestService_UnaryCall_Handler,
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "StreamingOutputCall",
+				Handler:       srv.streamingOutputCall,
+				ServerStreams: true,
+			},
+			{
+				StreamName:    "StreamingInputCall",
+				Handler:       srv.streamingInputCall,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "FullDuplexCall",
+				Handler:       srv.fullDuplexCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "HalfDuplexCall",
+				Handler:       srv.halfDuplexCall,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
 		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "StreamingOutputCall",
-			Handler:       _TestService_StreamingOutputCall_Handler,
-			ServerStreams: true,
-		},
-		{
-			StreamName:    "StreamingInputCall",
-			Handler:       _TestService_StreamingInputCall_Handler,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "FullDuplexCall",
-			Handler:       _TestService_FullDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-		{
-			StreamName:    "HalfDuplexCall",
-			Handler:       _TestService_HalfDuplexCall_Handler,
-			ServerStreams: true,
-			ClientStreams: true,
-		},
-	},
-	Metadata: "test/grpc_testing/test.proto",
+		Metadata: "test/grpc_testing/test.proto",
+	}
+
+	s.RegisterService(&sd, nil)
+}
+
+// NewTestServiceService creates a new TestServiceService containing the
+// implemented methods of the TestService service in s.  Any unimplemented
+// methods will result in the gRPC server returning an UNIMPLEMENTED status to the client.
+// This includes situations where the method handler is misspelled or has the wrong
+// signature.  For this reason, this function should be used with great care and
+// is not recommended to be used by most users.
+func NewTestServiceService(s interface{}) *TestServiceService {
+	ns := &TestServiceService{}
+	if h, ok := s.(interface {
+		EmptyCall(context.Context, *Empty) (*Empty, error)
+	}); ok {
+		ns.EmptyCall = h.EmptyCall
+	}
+	if h, ok := s.(interface {
+		UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	}); ok {
+		ns.UnaryCall = h.UnaryCall
+	}
+	if h, ok := s.(interface {
+		StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	}); ok {
+		ns.StreamingOutputCall = h.StreamingOutputCall
+	}
+	if h, ok := s.(interface {
+		StreamingInputCall(TestService_StreamingInputCallServer) error
+	}); ok {
+		ns.StreamingInputCall = h.StreamingInputCall
+	}
+	if h, ok := s.(interface {
+		FullDuplexCall(TestService_FullDuplexCallServer) error
+	}); ok {
+		ns.FullDuplexCall = h.FullDuplexCall
+	}
+	if h, ok := s.(interface {
+		HalfDuplexCall(TestService_HalfDuplexCallServer) error
+	}); ok {
+		ns.HalfDuplexCall = h.HalfDuplexCall
+	}
+	return ns
+}
+
+// UnstableTestServiceService is the service API for TestService service.
+// New methods may be added to this interface if they are added to the service
+// definition, which is not a backward-compatible change.  For this reason,
+// use of this type is not recommended.
+type UnstableTestServiceService interface {
+	// One empty request followed by one empty response.
+	EmptyCall(context.Context, *Empty) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(TestService_StreamingInputCallServer) error
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(TestService_HalfDuplexCallServer) error
 }

test/healthcheck_test.go

@@ -140,7 +140,7 @@ func setupServer(sc *svrConfig) (s *grpc.Server, lis net.Listener, ts *testHealt
 		ts = newTestHealthServer()
 	}
 	healthgrpc.RegisterHealthServer(s, ts)
-	testpb.RegisterTestServiceServer(s, &testServer{})
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(&testServer{}))
 	go s.Serve(lis)
 	return s, lis, ts, s.Stop, nil
 }

test/local_creds_test.go

@@ -64,7 +64,7 @@ func testLocalCredsE2ESucceed(network, address string) error {
 	s := grpc.NewServer(sopts...)
 	defer s.Stop()
 
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 
 	lis, err := net.Listen(network, address)
 	if err != nil {
@@ -162,7 +162,7 @@ func testLocalCredsE2EFail(dopts []grpc.DialOption) error {
 	s := grpc.NewServer(sopts...)
 	defer s.Stop()
 
-	testpb.RegisterTestServiceServer(s, ss)
+	testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
 
 	lis, err := net.Listen("tcp", "localhost:0")
 	if err != nil {