mirror of https://github.com/dapr/go-sdk.git
118 lines
3.2 KiB
Go
118 lines
3.2 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package grpc
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import (
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"net"
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"os"
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"sync/atomic"
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"github.com/pkg/errors"
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"google.golang.org/grpc"
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pb "github.com/dapr/go-sdk/dapr/proto/runtime/v1"
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"github.com/dapr/go-sdk/actor"
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"github.com/dapr/go-sdk/actor/config"
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"github.com/dapr/go-sdk/service/common"
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"github.com/dapr/go-sdk/service/internal"
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)
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// NewService creates new Service.
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func NewService(address string) (s common.Service, err error) {
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if address == "" {
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return nil, errors.New("nil address")
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}
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lis, err := net.Listen("tcp", address)
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if err != nil {
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err = errors.Wrapf(err, "failed to TCP listen on: %s", address)
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return
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}
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s = newService(lis)
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return
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}
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// NewServiceWithListener creates new Service with specific listener.
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func NewServiceWithListener(lis net.Listener) common.Service {
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return newService(lis)
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}
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func newService(lis net.Listener) *Server {
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s := &Server{
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listener: lis,
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invokeHandlers: make(map[string]common.ServiceInvocationHandler),
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topicRegistrar: make(internal.TopicRegistrar),
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bindingHandlers: make(map[string]common.BindingInvocationHandler),
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authToken: os.Getenv(common.AppAPITokenEnvVar),
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}
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gs := grpc.NewServer()
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pb.RegisterAppCallbackServer(gs, s)
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pb.RegisterAppCallbackHealthCheckServer(gs, s)
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s.grpcServer = gs
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return s
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}
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// Server is the gRPC service implementation for Dapr.
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type Server struct {
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pb.UnimplementedAppCallbackServer
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pb.UnimplementedAppCallbackHealthCheckServer
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listener net.Listener
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invokeHandlers map[string]common.ServiceInvocationHandler
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topicRegistrar internal.TopicRegistrar
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bindingHandlers map[string]common.BindingInvocationHandler
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healthCheckHandler common.HealthCheckHandler
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authToken string
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grpcServer *grpc.Server
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started uint32
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}
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func (s *Server) RegisterActorImplFactory(f actor.Factory, opts ...config.Option) {
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panic("Actor is not supported by gRPC API")
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}
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// Start registers the server and starts it.
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func (s *Server) Start() error {
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if !atomic.CompareAndSwapUint32(&s.started, 0, 1) {
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return errors.New("a gRPC server can only be started once")
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}
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return s.grpcServer.Serve(s.listener)
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}
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// Stop stops the previously-started service.
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func (s *Server) Stop() error {
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if atomic.LoadUint32(&s.started) == 0 {
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return nil
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}
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s.grpcServer.Stop()
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s.grpcServer = nil
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return nil
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}
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// GrecefulStop stops the previously-started service gracefully.
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func (s *Server) GracefulStop() error {
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if atomic.LoadUint32(&s.started) == 0 {
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return nil
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}
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s.grpcServer.GracefulStop()
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s.grpcServer = nil
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return nil
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}
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// GrpcServer returns the grpc.Server object managed by the server.
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func (s *Server) GrpcServer() *grpc.Server {
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return s.grpcServer
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}
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