Bidi Blocking Stub (#10318)

alts/src/generated/main/grpc/io/grpc/alts/internal/HandshakerServiceGrpc.java

@@ -60,6 +60,21 @@ public final class HandshakerServiceGrpc {
     return HandshakerServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static HandshakerServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<HandshakerServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<HandshakerServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public HandshakerServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new HandshakerServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return HandshakerServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -157,6 +172,40 @@ public final class HandshakerServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service HandshakerService.
    */
+  public static final class HandshakerServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<HandshakerServiceBlockingV2Stub> {
+    private HandshakerServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected HandshakerServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new HandshakerServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.alts.internal.HandshakerReq, io.grpc.alts.internal.HandshakerResp>
+        doHandshake() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getDoHandshakeMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service HandshakerService.
+   */
   public static final class HandshakerServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<HandshakerServiceBlockingStub> {
     private HandshakerServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/LoadBalancerStatsServiceGrpc.java

@@ -92,6 +92,21 @@ public final class LoadBalancerStatsServiceGrpc {
     return LoadBalancerStatsServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static LoadBalancerStatsServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<LoadBalancerStatsServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<LoadBalancerStatsServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public LoadBalancerStatsServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new LoadBalancerStatsServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return LoadBalancerStatsServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -212,6 +227,46 @@ public final class LoadBalancerStatsServiceGrpc {
    * A service used to obtain stats for verifying LB behavior.
    * </pre>
    */
+  public static final class LoadBalancerStatsServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<LoadBalancerStatsServiceBlockingV2Stub> {
+    private LoadBalancerStatsServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected LoadBalancerStatsServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new LoadBalancerStatsServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Gets the backend distribution for RPCs sent by a test client.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.LoadBalancerStatsResponse getClientStats(io.grpc.testing.integration.Messages.LoadBalancerStatsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetClientStatsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Gets the accumulated stats for RPCs sent by a test client.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.LoadBalancerAccumulatedStatsResponse getClientAccumulatedStats(io.grpc.testing.integration.Messages.LoadBalancerAccumulatedStatsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetClientAccumulatedStatsMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service LoadBalancerStatsService.
+   * <pre>
+   * A service used to obtain stats for verifying LB behavior.
+   * </pre>
+   */
   public static final class LoadBalancerStatsServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<LoadBalancerStatsServiceBlockingStub> {
     private LoadBalancerStatsServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/MetricsServiceGrpc.java

@@ -89,6 +89,21 @@ public final class MetricsServiceGrpc {
     return MetricsServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static MetricsServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<MetricsServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<MetricsServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public MetricsServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new MetricsServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return MetricsServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -199,6 +214,46 @@ public final class MetricsServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service MetricsService.
    */
+  public static final class MetricsServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<MetricsServiceBlockingV2Stub> {
+    private MetricsServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected MetricsServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new MetricsServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Returns the values of all the gauges that are currently being maintained by
+     * the service
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.integration.Metrics.GaugeResponse>
+        getAllGauges(io.grpc.testing.integration.Metrics.EmptyMessage request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getGetAllGaugesMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns the value of one gauge
+     * </pre>
+     */
+    public io.grpc.testing.integration.Metrics.GaugeResponse getGauge(io.grpc.testing.integration.Metrics.GaugeRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetGaugeMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service MetricsService.
+   */
   public static final class MetricsServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<MetricsServiceBlockingStub> {
     private MetricsServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/ReconnectServiceGrpc.java

@@ -92,6 +92,21 @@ public final class ReconnectServiceGrpc {
     return ReconnectServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ReconnectServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ReconnectServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ReconnectServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public ReconnectServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ReconnectServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ReconnectServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -200,6 +215,40 @@ public final class ReconnectServiceGrpc {
    * A service used to control reconnect server.
    * </pre>
    */
+  public static final class ReconnectServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ReconnectServiceBlockingV2Stub> {
+    private ReconnectServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ReconnectServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ReconnectServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty start(io.grpc.testing.integration.Messages.ReconnectParams request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getStartMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.Messages.ReconnectInfo stop(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getStopMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ReconnectService.
+   * <pre>
+   * A service used to control reconnect server.
+   * </pre>
+   */
   public static final class ReconnectServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ReconnectServiceBlockingStub> {
     private ReconnectServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/TestServiceGrpc.java

@@ -273,6 +273,21 @@ public final class TestServiceGrpc {
     return TestServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -543,6 +558,125 @@ public final class TestServiceGrpc {
    * performance with various types of payload.
    * </pre>
    */
+  public static final class TestServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingV2Stub> {
+    private TestServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * One empty request followed by one empty response.
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty emptyCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getEmptyCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.SimpleResponse unaryCall(io.grpc.testing.integration.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response. Response has cache control
+     * headers set such that a caching HTTP proxy (such as GFE) can
+     * satisfy subsequent requests.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.SimpleResponse cacheableUnaryCall(io.grpc.testing.integration.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getCacheableUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by a sequence of responses (streamed download).
+     * The server returns the payload with client desired type and sizes.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        streamingOutputCall(io.grpc.testing.integration.Messages.StreamingOutputCallRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamingOutputCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A sequence of requests followed by one response (streamed upload).
+     * The server returns the aggregated size of client payload as the result.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingInputCallRequest, io.grpc.testing.integration.Messages.StreamingInputCallResponse>
+        streamingInputCall() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getStreamingInputCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingOutputCallRequest, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        fullDuplexCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getFullDuplexCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingOutputCallRequest, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        halfDuplexCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getHalfDuplexCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * The test server will not implement this method. It will be used
+     * to test the behavior when clients call unimplemented methods.
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty unimplementedCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnimplementedCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestService.
+   * <pre>
+   * A simple service to test the various types of RPCs and experiment with
+   * performance with various types of payload.
+   * </pre>
+   */
   public static final class TestServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingStub> {
     private TestServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/UnimplementedServiceGrpc.java

@@ -63,6 +63,21 @@ public final class UnimplementedServiceGrpc {
     return UnimplementedServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static UnimplementedServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<UnimplementedServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<UnimplementedServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public UnimplementedServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new UnimplementedServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return UnimplementedServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -166,6 +181,37 @@ public final class UnimplementedServiceGrpc {
    * that case.
    * </pre>
    */
+  public static final class UnimplementedServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<UnimplementedServiceBlockingV2Stub> {
+    private UnimplementedServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected UnimplementedServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new UnimplementedServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * A call that no server should implement
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty unimplementedCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnimplementedCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service UnimplementedService.
+   * <pre>
+   * A simple service NOT implemented at servers so clients can test for
+   * that case.
+   * </pre>
+   */
   public static final class UnimplementedServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<UnimplementedServiceBlockingStub> {
     private UnimplementedServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/XdsUpdateClientConfigureServiceGrpc.java

@@ -62,6 +62,21 @@ public final class XdsUpdateClientConfigureServiceGrpc {
     return XdsUpdateClientConfigureServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static XdsUpdateClientConfigureServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<XdsUpdateClientConfigureServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<XdsUpdateClientConfigureServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public XdsUpdateClientConfigureServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new XdsUpdateClientConfigureServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return XdsUpdateClientConfigureServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -161,6 +176,36 @@ public final class XdsUpdateClientConfigureServiceGrpc {
    * A service to dynamically update the configuration of an xDS test client.
    * </pre>
    */
+  public static final class XdsUpdateClientConfigureServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<XdsUpdateClientConfigureServiceBlockingV2Stub> {
+    private XdsUpdateClientConfigureServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected XdsUpdateClientConfigureServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new XdsUpdateClientConfigureServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Update the tes client's configuration.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.ClientConfigureResponse configure(io.grpc.testing.integration.Messages.ClientConfigureRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getConfigureMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service XdsUpdateClientConfigureService.
+   * <pre>
+   * A service to dynamically update the configuration of an xDS test client.
+   * </pre>
+   */
   public static final class XdsUpdateClientConfigureServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<XdsUpdateClientConfigureServiceBlockingStub> {
     private XdsUpdateClientConfigureServiceBlockingStub(

android-interop-testing/src/generated/debug/grpc/io/grpc/testing/integration/XdsUpdateHealthServiceGrpc.java

@@ -92,6 +92,21 @@ public final class XdsUpdateHealthServiceGrpc {
     return XdsUpdateHealthServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static XdsUpdateHealthServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<XdsUpdateHealthServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<XdsUpdateHealthServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public XdsUpdateHealthServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new XdsUpdateHealthServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return XdsUpdateHealthServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -200,6 +215,40 @@ public final class XdsUpdateHealthServiceGrpc {
    * A service to remotely control health status of an xDS test server.
    * </pre>
    */
+  public static final class XdsUpdateHealthServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<XdsUpdateHealthServiceBlockingV2Stub> {
+    private XdsUpdateHealthServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected XdsUpdateHealthServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new XdsUpdateHealthServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty setServing(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSetServingMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty setNotServing(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSetNotServingMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service XdsUpdateHealthService.
+   * <pre>
+   * A service to remotely control health status of an xDS test server.
+   * </pre>
+   */
   public static final class XdsUpdateHealthServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<XdsUpdateHealthServiceBlockingStub> {
     private XdsUpdateHealthServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/LoadBalancerStatsServiceGrpc.java

@@ -92,6 +92,21 @@ public final class LoadBalancerStatsServiceGrpc {
     return LoadBalancerStatsServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static LoadBalancerStatsServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<LoadBalancerStatsServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<LoadBalancerStatsServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public LoadBalancerStatsServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new LoadBalancerStatsServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return LoadBalancerStatsServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -212,6 +227,46 @@ public final class LoadBalancerStatsServiceGrpc {
    * A service used to obtain stats for verifying LB behavior.
    * </pre>
    */
+  public static final class LoadBalancerStatsServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<LoadBalancerStatsServiceBlockingV2Stub> {
+    private LoadBalancerStatsServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected LoadBalancerStatsServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new LoadBalancerStatsServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Gets the backend distribution for RPCs sent by a test client.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.LoadBalancerStatsResponse getClientStats(io.grpc.testing.integration.Messages.LoadBalancerStatsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetClientStatsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Gets the accumulated stats for RPCs sent by a test client.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.LoadBalancerAccumulatedStatsResponse getClientAccumulatedStats(io.grpc.testing.integration.Messages.LoadBalancerAccumulatedStatsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetClientAccumulatedStatsMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service LoadBalancerStatsService.
+   * <pre>
+   * A service used to obtain stats for verifying LB behavior.
+   * </pre>
+   */
   public static final class LoadBalancerStatsServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<LoadBalancerStatsServiceBlockingStub> {
     private LoadBalancerStatsServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/MetricsServiceGrpc.java

@@ -89,6 +89,21 @@ public final class MetricsServiceGrpc {
     return MetricsServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static MetricsServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<MetricsServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<MetricsServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public MetricsServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new MetricsServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return MetricsServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -199,6 +214,46 @@ public final class MetricsServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service MetricsService.
    */
+  public static final class MetricsServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<MetricsServiceBlockingV2Stub> {
+    private MetricsServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected MetricsServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new MetricsServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Returns the values of all the gauges that are currently being maintained by
+     * the service
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.integration.Metrics.GaugeResponse>
+        getAllGauges(io.grpc.testing.integration.Metrics.EmptyMessage request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getGetAllGaugesMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns the value of one gauge
+     * </pre>
+     */
+    public io.grpc.testing.integration.Metrics.GaugeResponse getGauge(io.grpc.testing.integration.Metrics.GaugeRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetGaugeMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service MetricsService.
+   */
   public static final class MetricsServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<MetricsServiceBlockingStub> {
     private MetricsServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/ReconnectServiceGrpc.java

@@ -92,6 +92,21 @@ public final class ReconnectServiceGrpc {
     return ReconnectServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ReconnectServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ReconnectServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ReconnectServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public ReconnectServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ReconnectServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ReconnectServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -200,6 +215,40 @@ public final class ReconnectServiceGrpc {
    * A service used to control reconnect server.
    * </pre>
    */
+  public static final class ReconnectServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ReconnectServiceBlockingV2Stub> {
+    private ReconnectServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ReconnectServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ReconnectServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty start(io.grpc.testing.integration.Messages.ReconnectParams request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getStartMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.Messages.ReconnectInfo stop(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getStopMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ReconnectService.
+   * <pre>
+   * A service used to control reconnect server.
+   * </pre>
+   */
   public static final class ReconnectServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ReconnectServiceBlockingStub> {
     private ReconnectServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/TestServiceGrpc.java

@@ -273,6 +273,21 @@ public final class TestServiceGrpc {
     return TestServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -543,6 +558,125 @@ public final class TestServiceGrpc {
    * performance with various types of payload.
    * </pre>
    */
+  public static final class TestServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingV2Stub> {
+    private TestServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * One empty request followed by one empty response.
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty emptyCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getEmptyCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.SimpleResponse unaryCall(io.grpc.testing.integration.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response. Response has cache control
+     * headers set such that a caching HTTP proxy (such as GFE) can
+     * satisfy subsequent requests.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.SimpleResponse cacheableUnaryCall(io.grpc.testing.integration.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getCacheableUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by a sequence of responses (streamed download).
+     * The server returns the payload with client desired type and sizes.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        streamingOutputCall(io.grpc.testing.integration.Messages.StreamingOutputCallRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamingOutputCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A sequence of requests followed by one response (streamed upload).
+     * The server returns the aggregated size of client payload as the result.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingInputCallRequest, io.grpc.testing.integration.Messages.StreamingInputCallResponse>
+        streamingInputCall() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getStreamingInputCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingOutputCallRequest, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        fullDuplexCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getFullDuplexCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingOutputCallRequest, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        halfDuplexCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getHalfDuplexCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * The test server will not implement this method. It will be used
+     * to test the behavior when clients call unimplemented methods.
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty unimplementedCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnimplementedCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestService.
+   * <pre>
+   * A simple service to test the various types of RPCs and experiment with
+   * performance with various types of payload.
+   * </pre>
+   */
   public static final class TestServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingStub> {
     private TestServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/UnimplementedServiceGrpc.java

@@ -63,6 +63,21 @@ public final class UnimplementedServiceGrpc {
     return UnimplementedServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static UnimplementedServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<UnimplementedServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<UnimplementedServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public UnimplementedServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new UnimplementedServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return UnimplementedServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -166,6 +181,37 @@ public final class UnimplementedServiceGrpc {
    * that case.
    * </pre>
    */
+  public static final class UnimplementedServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<UnimplementedServiceBlockingV2Stub> {
+    private UnimplementedServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected UnimplementedServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new UnimplementedServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * A call that no server should implement
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty unimplementedCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnimplementedCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service UnimplementedService.
+   * <pre>
+   * A simple service NOT implemented at servers so clients can test for
+   * that case.
+   * </pre>
+   */
   public static final class UnimplementedServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<UnimplementedServiceBlockingStub> {
     private UnimplementedServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/XdsUpdateClientConfigureServiceGrpc.java

@@ -62,6 +62,21 @@ public final class XdsUpdateClientConfigureServiceGrpc {
     return XdsUpdateClientConfigureServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static XdsUpdateClientConfigureServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<XdsUpdateClientConfigureServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<XdsUpdateClientConfigureServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public XdsUpdateClientConfigureServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new XdsUpdateClientConfigureServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return XdsUpdateClientConfigureServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -161,6 +176,36 @@ public final class XdsUpdateClientConfigureServiceGrpc {
    * A service to dynamically update the configuration of an xDS test client.
    * </pre>
    */
+  public static final class XdsUpdateClientConfigureServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<XdsUpdateClientConfigureServiceBlockingV2Stub> {
+    private XdsUpdateClientConfigureServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected XdsUpdateClientConfigureServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new XdsUpdateClientConfigureServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Update the tes client's configuration.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.ClientConfigureResponse configure(io.grpc.testing.integration.Messages.ClientConfigureRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getConfigureMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service XdsUpdateClientConfigureService.
+   * <pre>
+   * A service to dynamically update the configuration of an xDS test client.
+   * </pre>
+   */
   public static final class XdsUpdateClientConfigureServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<XdsUpdateClientConfigureServiceBlockingStub> {
     private XdsUpdateClientConfigureServiceBlockingStub(

android-interop-testing/src/generated/release/grpc/io/grpc/testing/integration/XdsUpdateHealthServiceGrpc.java

@@ -92,6 +92,21 @@ public final class XdsUpdateHealthServiceGrpc {
     return XdsUpdateHealthServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static XdsUpdateHealthServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<XdsUpdateHealthServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<XdsUpdateHealthServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public XdsUpdateHealthServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new XdsUpdateHealthServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return XdsUpdateHealthServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -200,6 +215,40 @@ public final class XdsUpdateHealthServiceGrpc {
    * A service to remotely control health status of an xDS test server.
    * </pre>
    */
+  public static final class XdsUpdateHealthServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<XdsUpdateHealthServiceBlockingV2Stub> {
+    private XdsUpdateHealthServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected XdsUpdateHealthServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new XdsUpdateHealthServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty setServing(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSetServingMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty setNotServing(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSetNotServingMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service XdsUpdateHealthService.
+   * <pre>
+   * A service to remotely control health status of an xDS test server.
+   * </pre>
+   */
   public static final class XdsUpdateHealthServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<XdsUpdateHealthServiceBlockingStub> {
     private XdsUpdateHealthServiceBlockingStub(

benchmarks/src/generated/main/grpc/io/grpc/benchmarks/proto/BenchmarkServiceGrpc.java

@@ -184,6 +184,21 @@ public final class BenchmarkServiceGrpc {
     return BenchmarkServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static BenchmarkServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<BenchmarkServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<BenchmarkServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public BenchmarkServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new BenchmarkServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return BenchmarkServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -367,6 +382,87 @@ public final class BenchmarkServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service BenchmarkService.
    */
+  public static final class BenchmarkServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<BenchmarkServiceBlockingV2Stub> {
+    private BenchmarkServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected BenchmarkServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new BenchmarkServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response.
+     * The server returns the client payload as-is.
+     * </pre>
+     */
+    public io.grpc.benchmarks.proto.Messages.SimpleResponse unaryCall(io.grpc.benchmarks.proto.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Repeated sequence of one request followed by one response.
+     * Should be called streaming ping-pong
+     * The server returns the client payload as-is on each response
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.benchmarks.proto.Messages.SimpleRequest, io.grpc.benchmarks.proto.Messages.SimpleResponse>
+        streamingCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getStreamingCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * Single-sided unbounded streaming from client to server
+     * The server returns the client payload as-is once the client does WritesDone
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.benchmarks.proto.Messages.SimpleRequest, io.grpc.benchmarks.proto.Messages.SimpleResponse>
+        streamingFromClient() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getStreamingFromClientMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * Single-sided unbounded streaming from server to client
+     * The server repeatedly returns the client payload as-is
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.benchmarks.proto.Messages.SimpleResponse>
+        streamingFromServer(io.grpc.benchmarks.proto.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamingFromServerMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Two-sided unbounded streaming between server to client
+     * Both sides send the content of their own choice to the other
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.benchmarks.proto.Messages.SimpleRequest, io.grpc.benchmarks.proto.Messages.SimpleResponse>
+        streamingBothWays() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getStreamingBothWaysMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service BenchmarkService.
+   */
   public static final class BenchmarkServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<BenchmarkServiceBlockingStub> {
     private BenchmarkServiceBlockingStub(

benchmarks/src/generated/main/grpc/io/grpc/benchmarks/proto/ReportQpsScenarioServiceGrpc.java

@@ -60,6 +60,21 @@ public final class ReportQpsScenarioServiceGrpc {
     return ReportQpsScenarioServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ReportQpsScenarioServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ReportQpsScenarioServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ReportQpsScenarioServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public ReportQpsScenarioServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ReportQpsScenarioServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ReportQpsScenarioServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -147,6 +162,33 @@ public final class ReportQpsScenarioServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service ReportQpsScenarioService.
    */
+  public static final class ReportQpsScenarioServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ReportQpsScenarioServiceBlockingV2Stub> {
+    private ReportQpsScenarioServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ReportQpsScenarioServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ReportQpsScenarioServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Report results of a QPS test benchmark scenario.
+     * </pre>
+     */
+    public io.grpc.benchmarks.proto.Control.Void reportScenario(io.grpc.benchmarks.proto.Control.ScenarioResult request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getReportScenarioMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ReportQpsScenarioService.
+   */
   public static final class ReportQpsScenarioServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ReportQpsScenarioServiceBlockingStub> {
     private ReportQpsScenarioServiceBlockingStub(

benchmarks/src/generated/main/grpc/io/grpc/benchmarks/proto/WorkerServiceGrpc.java

@@ -153,6 +153,21 @@ public final class WorkerServiceGrpc {
     return WorkerServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static WorkerServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<WorkerServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<WorkerServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public WorkerServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new WorkerServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return WorkerServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -323,6 +338,77 @@ public final class WorkerServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service WorkerService.
    */
+  public static final class WorkerServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<WorkerServiceBlockingV2Stub> {
+    private WorkerServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected WorkerServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new WorkerServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.benchmarks.proto.Control.ServerArgs, io.grpc.benchmarks.proto.Control.ServerStatus>
+        runServer() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getRunServerMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.benchmarks.proto.Control.ClientArgs, io.grpc.benchmarks.proto.Control.ClientStatus>
+        runClient() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getRunClientMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * Just return the core count - unary call
+     * </pre>
+     */
+    public io.grpc.benchmarks.proto.Control.CoreResponse coreCount(io.grpc.benchmarks.proto.Control.CoreRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getCoreCountMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Quit this worker
+     * </pre>
+     */
+    public io.grpc.benchmarks.proto.Control.Void quitWorker(io.grpc.benchmarks.proto.Control.Void request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getQuitWorkerMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service WorkerService.
+   */
   public static final class WorkerServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<WorkerServiceBlockingStub> {
     private WorkerServiceBlockingStub(

compiler/src/java_plugin/cpp/java_generator.cpp

@@ -355,13 +355,15 @@ enum StubType {
   BLOCKING_CLIENT_IMPL = 5,
   FUTURE_CLIENT_IMPL = 6,
   ABSTRACT_CLASS = 7,
-  NONE = 8,
+  BLOCKING_V2_CLIENT_IMPL = 8,
+  NONE = 999,
 };
 
 enum CallType {
   ASYNC_CALL = 0,
   BLOCKING_CALL = 1,
-  FUTURE_CALL = 2
+  FUTURE_CALL = 2,
+  BLOCKING_V2_CALL = 3,
 };
 
 // TODO(nmittler): Remove once protobuf includes javadoc methods in distribution.
@@ -410,6 +412,9 @@ static void GrpcWriteServiceDocComment(Printer* printer,
       printer->Print(vars, " * A stub to allow clients to do asynchronous rpc calls to service $service$.\n");
       break;
     case BLOCKING_CLIENT_IMPL:
+      printer->Print(vars, " * A stub to allow clients to do llimited synchronous rpc calls to service $service$.\n");
+      break;
+    case BLOCKING_V2_CLIENT_IMPL:
       printer->Print(vars, " * A stub to allow clients to do synchronous rpc calls to service $service$.\n");
       break;
     case FUTURE_CLIENT_IMPL:
@@ -555,6 +560,9 @@ static void PrintStubFactory(
     case BLOCKING_CLIENT_IMPL:
       stub_type_name = "Blocking";
       break;
+    case BLOCKING_V2_CLIENT_IMPL:
+      stub_type_name = "BlockingV2";
+      break;
     default:
       GRPC_CODEGEN_FAIL << "Cannot generate StubFactory for StubType: " << type;
   }
@@ -597,6 +605,11 @@ static void PrintStub(
       stub_name += "BlockingStub";
       stub_base_class_name = "AbstractBlockingStub";
       break;
+    case BLOCKING_V2_CLIENT_IMPL:
+      call_type = BLOCKING_V2_CALL;
+      stub_name += "BlockingV2Stub";
+      stub_base_class_name = "AbstractBlockingStub";
+      break;
     case FUTURE_CLIENT_IMPL:
       call_type = FUTURE_CALL;
       stub_name += "FutureStub";
@@ -679,13 +692,17 @@ static void PrintStub(
 
     // Method signature
     p->Print("\n");
-    // TODO(nmittler): Replace with WriteMethodDocComment once included by the protobuf distro.
     GrpcWriteMethodDocComment(p, method);
 
     if (method->options().deprecated()) {
       p->Print(*vars, "@$Deprecated$\n");
     }
 
+    if ((call_type == BLOCKING_CALL && client_streaming && server_streaming)
+       || (call_type == BLOCKING_V2_CALL && (client_streaming || server_streaming))) {
+      p->Print(*vars, "@io.grpc.ExperimentalApi(\"https://github.com/grpc/grpc-java/issues/10918\")\n");
+    }
+
     if (!interface) {
       p->Print("public ");
     } else {
@@ -695,7 +712,12 @@ static void PrintStub(
       case BLOCKING_CALL:
         GRPC_CODEGEN_CHECK(!client_streaming)
             << "Blocking client interface with client streaming is unavailable";
-        if (server_streaming) {
+        if (client_streaming && server_streaming) {
+          p->Print(
+              *vars,
+              "$BlockingClientCall$<$input_type$, $output_type$>\n"
+               "    $lower_method_name$()");
+        } else if (server_streaming) {
           // Server streaming
           p->Print(
               *vars,
@@ -708,6 +730,25 @@ static void PrintStub(
               "$output_type$ $lower_method_name$($input_type$ request)");
         }
         break;
+      case BLOCKING_V2_CALL:
+        if (client_streaming) { // Both Bidi and Client Streaming
+          p->Print(
+              *vars,
+              "$BlockingClientCall$<$input_type$, $output_type$>\n"
+               "    $lower_method_name$()");
+        } else if (server_streaming) {
+          // Server streaming
+          p->Print(
+              *vars,
+              "$BlockingClientCall$<?, $output_type$>\n"
+              "    $lower_method_name$($input_type$ request)");
+       } else {
+          // Simple RPC
+          p->Print(
+              *vars,
+              "$output_type$ $lower_method_name$($input_type$ request)");
+       }
+       break;
       case ASYNC_CALL:
         if (client_streaming) {
           // Bidirectional streaming or client streaming
@@ -756,7 +797,7 @@ static void PrintStub(
         switch (call_type) {
         case BLOCKING_CALL:
           GRPC_CODEGEN_CHECK(!client_streaming)
-              << "Blocking client streaming interface is not available";
+              << "Blocking client and bidi streaming interface are not available";
             if (server_streaming) {
               (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingServerStreamingCall";
               (*vars)["params"] = "request";
@@ -769,6 +810,31 @@ static void PrintStub(
                 "return $calls_method$(\n"
                 "    getChannel(), $method_method_name$(), getCallOptions(), $params$);\n");
           break;
+        case BLOCKING_V2_CALL:
+          if (client_streaming) { // client and bidi streaming
+                if (server_streaming) {
+                    (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingBidiStreamingCall";
+                 } else {
+                   (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingClientStreamingCall";
+                 }
+           p->Print(
+                *vars,
+                "return $calls_method$(\n"
+                "    getChannel(), $method_method_name$(), getCallOptions());\n");
+          } else { // server streaming and unary
+               (*vars)["params"] = "request";
+               if (server_streaming) {
+                   (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall";
+                } else {
+                  (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingUnaryCall";
+                }
+
+            p->Print(
+                *vars,
+                "return $calls_method$(\n"
+                "    getChannel(), $method_method_name$(), getCallOptions(), $params$);\n");
+          }
+          break;
         case ASYNC_CALL:
           if (server_streaming) {
             if (client_streaming) {
@@ -1173,6 +1239,21 @@ static void PrintService(const ServiceDescriptor* service,
   p->Outdent();
   p->Print("}\n\n");
 
+  // TODO(nmittler): Replace with WriteDocComment once included by protobuf distro.
+  GrpcWriteDocComment(p, " Creates a new blocking-style stub that supports all types of calls "
+                         "on the service");
+  p->Print(
+      *vars,
+      "public static $service_name$BlockingV2Stub newBlockingV2Stub(\n"
+      "    $Channel$ channel) {\n");
+  p->Indent();
+  PrintStubFactory(service, vars, p, BLOCKING_V2_CLIENT_IMPL);
+  p->Print(
+      *vars,
+      "return $service_name$BlockingV2Stub.newStub(factory, channel);\n");
+  p->Outdent();
+  p->Print("}\n\n");
+
   // TODO(nmittler): Replace with WriteDocComment once included by protobuf distro.
   GrpcWriteDocComment(p, " Creates a new blocking-style stub that supports unary and streaming "
                          "output calls on the service");
@@ -1206,6 +1287,7 @@ static void PrintService(const ServiceDescriptor* service,
   PrintStub(service, vars, p, ASYNC_INTERFACE);
   PrintAbstractClassStub(service, vars, p);
   PrintStub(service, vars, p, ASYNC_CLIENT_IMPL);
+  PrintStub(service, vars, p, BLOCKING_V2_CLIENT_IMPL);
   PrintStub(service, vars, p, BLOCKING_CLIENT_IMPL);
   PrintStub(service, vars, p, FUTURE_CLIENT_IMPL);
 
@@ -1257,6 +1339,7 @@ void GenerateService(const ServiceDescriptor* service,
   vars["RpcMethod"] = "io.grpc.stub.annotations.RpcMethod";
   vars["MethodDescriptor"] = "io.grpc.MethodDescriptor";
   vars["StreamObserver"] = "io.grpc.stub.StreamObserver";
+  vars["BlockingClientCall"] = "io.grpc.stub.BlockingClientCall";
   vars["Iterator"] = "java.util.Iterator";
   vars["GrpcGenerated"] = "io.grpc.stub.annotations.GrpcGenerated";
   vars["ListenableFuture"] =

compiler/src/test/golden/TestDeprecatedService.java.txt

@@ -64,6 +64,21 @@ public final class TestDeprecatedServiceGrpc {
     return TestDeprecatedServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestDeprecatedServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestDeprecatedServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestDeprecatedServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestDeprecatedServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestDeprecatedServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestDeprecatedServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -169,6 +184,38 @@ public final class TestDeprecatedServiceGrpc {
    * </pre>
    */
   @java.lang.Deprecated
+  public static final class TestDeprecatedServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestDeprecatedServiceBlockingV2Stub> {
+    private TestDeprecatedServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestDeprecatedServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestDeprecatedServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * An RPC method that has been deprecated and should generate with Java's &#64;Deprecated annotation
+     * </pre>
+     */
+    @java.lang.Deprecated
+    public io.grpc.testing.compiler.Test.SimpleResponse deprecatedMethod(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getDeprecatedMethodMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestDeprecatedService.
+   * <pre>
+   * Test service that has been deprecated and should generate with Java's &#64;Deprecated annotation
+   * </pre>
+   */
+  @java.lang.Deprecated
   public static final class TestDeprecatedServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestDeprecatedServiceBlockingStub> {
     private TestDeprecatedServiceBlockingStub(

compiler/src/test/golden/TestService.java.txt

@@ -282,6 +282,21 @@ public final class TestServiceGrpc {
     return TestServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -546,6 +561,125 @@ public final class TestServiceGrpc {
    * Test service that supports all call types.
    * </pre>
    */
+  public static final class TestServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingV2Stub> {
+    private TestServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response.
+     * The server returns the client payload as-is.
+     * </pre>
+     */
+    public io.grpc.testing.compiler.Test.SimpleResponse unaryCall(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by a sequence of responses (streamed download).
+     * The server returns the payload with client desired type and sizes.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.compiler.Test.StreamingOutputCallResponse>
+        streamingOutputCall(io.grpc.testing.compiler.Test.StreamingOutputCallRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamingOutputCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A sequence of requests followed by one response (streamed upload).
+     * The server returns the aggregated size of client payload as the result.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingInputCallRequest, io.grpc.testing.compiler.Test.StreamingInputCallResponse>
+        streamingInputCall() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getStreamingInputCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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 bidirectionality.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingOutputCallRequest, io.grpc.testing.compiler.Test.StreamingOutputCallResponse>
+        fullBidiCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getFullBidiCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingOutputCallRequest, io.grpc.testing.compiler.Test.StreamingOutputCallResponse>
+        halfBidiCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getHalfBidiCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * An RPC method whose Java name collides with a keyword, and whose generated
+     * method should have a '_' appended.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingInputCallRequest, io.grpc.testing.compiler.Test.StreamingInputCallResponse>
+        import_() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getImportMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * A unary call that is Safe.
+     * </pre>
+     */
+    public io.grpc.testing.compiler.Test.SimpleResponse safeCall(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSafeCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A unary call that is Idempotent.
+     * </pre>
+     */
+    public io.grpc.testing.compiler.Test.SimpleResponse idempotentCall(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getIdempotentCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestService.
+   * <pre>
+   * Test service that supports all call types.
+   * </pre>
+   */
   public static final class TestServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingStub> {
     private TestServiceBlockingStub(

compiler/src/testLite/golden/TestDeprecatedService.java.txt

@@ -60,6 +60,21 @@ public final class TestDeprecatedServiceGrpc {
     return TestDeprecatedServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestDeprecatedServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestDeprecatedServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestDeprecatedServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestDeprecatedServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestDeprecatedServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestDeprecatedServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -165,6 +180,38 @@ public final class TestDeprecatedServiceGrpc {
    * </pre>
    */
   @java.lang.Deprecated
+  public static final class TestDeprecatedServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestDeprecatedServiceBlockingV2Stub> {
+    private TestDeprecatedServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestDeprecatedServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestDeprecatedServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * An RPC method that has been deprecated and should generate with Java's &#64;Deprecated annotation
+     * </pre>
+     */
+    @java.lang.Deprecated
+    public io.grpc.testing.compiler.Test.SimpleResponse deprecatedMethod(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getDeprecatedMethodMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestDeprecatedService.
+   * <pre>
+   * Test service that has been deprecated and should generate with Java's &#64;Deprecated annotation
+   * </pre>
+   */
+  @java.lang.Deprecated
   public static final class TestDeprecatedServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestDeprecatedServiceBlockingStub> {
     private TestDeprecatedServiceBlockingStub(

compiler/src/testLite/golden/TestService.java.txt

@@ -271,6 +271,21 @@ public final class TestServiceGrpc {
     return TestServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -535,6 +550,125 @@ public final class TestServiceGrpc {
    * Test service that supports all call types.
    * </pre>
    */
+  public static final class TestServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingV2Stub> {
+    private TestServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response.
+     * The server returns the client payload as-is.
+     * </pre>
+     */
+    public io.grpc.testing.compiler.Test.SimpleResponse unaryCall(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by a sequence of responses (streamed download).
+     * The server returns the payload with client desired type and sizes.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.compiler.Test.StreamingOutputCallResponse>
+        streamingOutputCall(io.grpc.testing.compiler.Test.StreamingOutputCallRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamingOutputCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A sequence of requests followed by one response (streamed upload).
+     * The server returns the aggregated size of client payload as the result.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingInputCallRequest, io.grpc.testing.compiler.Test.StreamingInputCallResponse>
+        streamingInputCall() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getStreamingInputCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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 bidirectionality.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingOutputCallRequest, io.grpc.testing.compiler.Test.StreamingOutputCallResponse>
+        fullBidiCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getFullBidiCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingOutputCallRequest, io.grpc.testing.compiler.Test.StreamingOutputCallResponse>
+        halfBidiCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getHalfBidiCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * An RPC method whose Java name collides with a keyword, and whose generated
+     * method should have a '_' appended.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.compiler.Test.StreamingInputCallRequest, io.grpc.testing.compiler.Test.StreamingInputCallResponse>
+        import_() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getImportMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * A unary call that is Safe.
+     * </pre>
+     */
+    public io.grpc.testing.compiler.Test.SimpleResponse safeCall(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSafeCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A unary call that is Idempotent.
+     * </pre>
+     */
+    public io.grpc.testing.compiler.Test.SimpleResponse idempotentCall(io.grpc.testing.compiler.Test.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getIdempotentCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestService.
+   * <pre>
+   * Test service that supports all call types.
+   * </pre>
+   */
   public static final class TestServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingStub> {
     private TestServiceBlockingStub(

examples/build.gradle

@@ -109,6 +109,7 @@ createStartScripts('io.grpc.examples.keepalive.KeepAliveClient')
 createStartScripts('io.grpc.examples.keepalive.KeepAliveServer')
 createStartScripts('io.grpc.examples.loadbalance.LoadBalanceClient')
 createStartScripts('io.grpc.examples.loadbalance.LoadBalanceServer')
+createStartScripts('io.grpc.examples.manualflowcontrol.BidiBlockingClient')
 createStartScripts('io.grpc.examples.manualflowcontrol.ManualFlowControlClient')
 createStartScripts('io.grpc.examples.manualflowcontrol.ManualFlowControlServer')
 createStartScripts('io.grpc.examples.multiplex.MultiplexingServer')

examples/src/main/java/io/grpc/examples/manualflowcontrol/BidiBlockingClient.java

@@ -0,0 +1,286 @@
+/*
+ * Copyright 2023 The gRPC Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.grpc.examples.manualflowcontrol;
+
+import com.google.protobuf.ByteString;
+import io.grpc.Grpc;
+import io.grpc.InsecureChannelCredentials;
+import io.grpc.ManagedChannel;
+import io.grpc.StatusException;
+import io.grpc.examples.manualflowcontrol.StreamingGreeterGrpc.StreamingGreeterBlockingV2Stub;
+import io.grpc.stub.BlockingClientCall;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Logger;
+
+
+/**
+ * A class that tries multiple ways to do blocking bidi streaming
+ * communication with an echo server
+ */
+public class BidiBlockingClient {
+
+  private static final Logger logger = Logger.getLogger(BidiBlockingClient.class.getName());
+
+  /**
+   * Greet server. If provided, the first element of {@code args} is the name to use in the
+   * greeting. The second argument is the target server. You can see the multiplexing in the server
+   * logs.
+   */
+  public static void main(String[] args) throws Exception {
+    System.setProperty("java.util.logging.SimpleFormatter.format", "%1$tH:%1$tM:%1$tS %5$s%6$s%n");
+
+    // Access a service running on the local machine on port 50051
+    String target = "localhost:50051";
+    // Allow passing in the user and target strings as command line arguments
+    if (args.length > 0) {
+      if ("--help".equals(args[0])) {
+        System.err.println("Usage: [target]\n");
+        System.err.println("  target  The server to connect to. Defaults to " + target);
+        System.exit(1);
+      }
+      target = args[0];
+    }
+
+    // Create a communication channel to the server, known as a Channel. Channels are thread-safe
+    // and reusable. It is common to create channels at the beginning of your application and reuse
+    // them until the application shuts down.
+    //
+    // For the example we use plaintext insecure credentials to avoid needing TLS certificates. To
+    // use TLS, use TlsChannelCredentials instead.
+    ManagedChannel channel = Grpc.newChannelBuilder(target, InsecureChannelCredentials.create())
+        .build();
+    StreamingGreeterBlockingV2Stub blockingStub = StreamingGreeterGrpc.newBlockingV2Stub(channel);
+    List<String> echoInput = names();
+    try {
+      long start = System.currentTimeMillis();
+      List<String> twoThreadResult = useTwoThreads(blockingStub, echoInput);
+      long finish = System.currentTimeMillis();
+
+      System.out.println("The echo requests and results were:");
+      printResultMessage("Input", echoInput, 0L);
+      printResultMessage("2 threads", twoThreadResult, finish - start);
+    } finally {
+      // ManagedChannels use resources like threads and TCP connections. To prevent leaking these
+      // resources the channel should be shut down when it will no longer be used. If it may be used
+      // again leave it running.
+      channel.shutdownNow().awaitTermination(5, TimeUnit.SECONDS);
+    }
+  }
+
+  private static void printResultMessage(String type, List<String> result, long millis) {
+    String msg = String.format("%-32s: %2d, %.3f sec", type, result.size(), millis/1000.0);
+    logger.info(msg);
+  }
+
+  private static void logMethodStart(String method) {
+    logger.info("--------------------- Starting to process using method:  " + method);
+  }
+
+  /**
+   *  Create 2 threads, one that writes all values, and one that reads until the stream closes.
+   */
+  private static List<String> useTwoThreads(StreamingGreeterBlockingV2Stub blockingStub,
+      List<String> valuesToWrite) throws InterruptedException {
+    logMethodStart("Two Threads");
+
+    List<String> readValues = new ArrayList<>();
+    final BlockingClientCall<HelloRequest, HelloReply> stream = blockingStub.sayHelloStreaming();
+
+    Thread reader = new Thread(null,
+        new Runnable() {
+          @Override
+          public void run() {
+            int count = 0;
+            try {
+              while (stream.hasNext()) {
+                readValues.add(stream.read().getMessage());
+                if (++count % 10 == 0) {
+                  logger.info("Finished " + count + " reads");
+                }
+              }
+            } catch (InterruptedException e) {
+              Thread.currentThread().interrupt();
+              stream.cancel("Interrupted", e);
+            } catch (StatusException e) {
+              logger.warning("Encountered error while reading: " + e);
+            }
+          }
+        },"reader");
+
+    Thread writer = new Thread(null,
+        new Runnable() {
+      @Override
+      public void run() {
+        ByteString padding = createPadding();
+        int count = 0;
+        Iterator<String> iterator = valuesToWrite.iterator();
+        boolean hadProblem = false;
+        try {
+          while (iterator.hasNext()) {
+            if (!stream.write(HelloRequest.newBuilder().setName(iterator.next()).setPadding(padding)
+                .build())) {
+              logger.warning("Stream closed before writes completed");
+              hadProblem = true;
+              break;
+            }
+            if (++count % 10 == 0) {
+              logger.info("Finished " + count + " writes");
+            }
+          }
+          if (!hadProblem) {
+            logger.info("Completed writes");
+            stream.halfClose();
+          }
+        } catch (InterruptedException e) {
+          Thread.currentThread().interrupt();
+          stream.cancel("Interrupted", e);
+        } catch (StatusException e) {
+          logger.warning("Encountered error while writing: " + e);
+        }
+      }
+    }, "writer");
+
+    writer.start();
+    reader.start();
+    writer.join();
+    reader.join();
+
+    return readValues;
+  }
+
+  private static ByteString createPadding() {
+    int multiple = 50;
+    ByteBuffer data = ByteBuffer.allocate(1024 * multiple);
+
+    for (int i = 0; i < multiple * 1024 / 4; i++) {
+      data.putInt(4 * i, 1111);
+    }
+
+    return ByteString.copyFrom(data);
+  }
+
+
+  private static List<String> names() {
+    return Arrays.asList(
+        "Sophia",
+        "Jackson",
+        "Emma",
+        "Aiden",
+        "Olivia",
+        "Lucas",
+        "Ava",
+        "Liam",
+        "Mia",
+        "Noah",
+        "Isabella",
+        "Ethan",
+        "Riley",
+        "Mason",
+        "Aria",
+        "Caden",
+        "Zoe",
+        "Oliver",
+        "Charlotte",
+        "Elijah",
+        "Lily",
+        "Grayson",
+        "Layla",
+        "Jacob",
+        "Amelia",
+        "Michael",
+        "Emily",
+        "Benjamin",
+        "Madelyn",
+        "Carter",
+        "Aubrey",
+        "James",
+        "Adalyn",
+        "Jayden",
+        "Madison",
+        "Logan",
+        "Chloe",
+        "Alexander",
+        "Harper",
+        "Caleb",
+        "Abigail",
+        "Ryan",
+        "Aaliyah",
+        "Luke",
+        "Avery",
+        "Daniel",
+        "Evelyn",
+        "Jack",
+        "Kaylee",
+        "William",
+        "Ella",
+        "Owen",
+        "Ellie",
+        "Gabriel",
+        "Scarlett",
+        "Matthew",
+        "Arianna",
+        "Connor",
+        "Hailey",
+        "Jayce",
+        "Nora",
+        "Isaac",
+        "Addison",
+        "Sebastian",
+        "Brooklyn",
+        "Henry",
+        "Hannah",
+        "Muhammad",
+        "Mila",
+        "Cameron",
+        "Leah",
+        "Wyatt",
+        "Elizabeth",
+        "Dylan",
+        "Sarah",
+        "Nathan",
+        "Eliana",
+        "Nicholas",
+        "Mackenzie",
+        "Julian",
+        "Peyton",
+        "Eli",
+        "Maria",
+        "Levi",
+        "Grace",
+        "Isaiah",
+        "Adeline",
+        "Landon",
+        "Elena",
+        "David",
+        "Anna",
+        "Christian",
+        "Victoria",
+        "Andrew",
+        "Camilla",
+        "Brayden",
+        "Lillian",
+        "John",
+        "Natalie",
+        "Lincoln"
+    );
+  }
+}

examples/src/main/java/io/grpc/examples/manualflowcontrol/ManualFlowControlServer.java

@@ -72,6 +72,7 @@ public class ManualFlowControlServer {
 
         // Give gRPC a StreamObserver that can observe and process incoming requests.
         return new StreamObserver<HelloRequest>() {
+          int cnt = 0;
           @Override
           public void onNext(HelloRequest request) {
             // Process the request and send a response or an error.
@@ -81,7 +82,8 @@ public class ManualFlowControlServer {
               logger.info("--> " + name);
 
               // Simulate server "work"
-              Thread.sleep(100);
+              int sleepMillis = ++cnt % 20 == 0 ? 2000 : 100;
+              Thread.sleep(sleepMillis);
 
               // Send a response.
               String message = "Hello " + name;

examples/src/main/proto/hello_streaming.proto

@@ -29,6 +29,7 @@ service StreamingGreeter {
 // The request message containing the user's name.
 message HelloRequest {
   string name = 1;
+  bytes padding = 2;
 }
 
 // The response message containing the greetings

grpclb/src/generated/main/grpc/io/grpc/lb/v1/LoadBalancerGrpc.java

@@ -60,6 +60,21 @@ public final class LoadBalancerGrpc {
     return LoadBalancerStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static LoadBalancerBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<LoadBalancerBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<LoadBalancerBlockingV2Stub>() {
+        @java.lang.Override
+        public LoadBalancerBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new LoadBalancerBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return LoadBalancerBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -147,6 +162,35 @@ public final class LoadBalancerGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service LoadBalancer.
    */
+  public static final class LoadBalancerBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<LoadBalancerBlockingV2Stub> {
+    private LoadBalancerBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected LoadBalancerBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new LoadBalancerBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Bidirectional rpc to get a list of servers.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.lb.v1.LoadBalanceRequest, io.grpc.lb.v1.LoadBalanceResponse>
+        balanceLoad() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getBalanceLoadMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service LoadBalancer.
+   */
   public static final class LoadBalancerBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<LoadBalancerBlockingStub> {
     private LoadBalancerBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/LoadBalancerStatsServiceGrpc.java

@@ -94,6 +94,21 @@ public final class LoadBalancerStatsServiceGrpc {
     return LoadBalancerStatsServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static LoadBalancerStatsServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<LoadBalancerStatsServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<LoadBalancerStatsServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public LoadBalancerStatsServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new LoadBalancerStatsServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return LoadBalancerStatsServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -214,6 +229,46 @@ public final class LoadBalancerStatsServiceGrpc {
    * A service used to obtain stats for verifying LB behavior.
    * </pre>
    */
+  public static final class LoadBalancerStatsServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<LoadBalancerStatsServiceBlockingV2Stub> {
+    private LoadBalancerStatsServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected LoadBalancerStatsServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new LoadBalancerStatsServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Gets the backend distribution for RPCs sent by a test client.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.LoadBalancerStatsResponse getClientStats(io.grpc.testing.integration.Messages.LoadBalancerStatsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetClientStatsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Gets the accumulated stats for RPCs sent by a test client.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.LoadBalancerAccumulatedStatsResponse getClientAccumulatedStats(io.grpc.testing.integration.Messages.LoadBalancerAccumulatedStatsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetClientAccumulatedStatsMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service LoadBalancerStatsService.
+   * <pre>
+   * A service used to obtain stats for verifying LB behavior.
+   * </pre>
+   */
   public static final class LoadBalancerStatsServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<LoadBalancerStatsServiceBlockingStub> {
     private LoadBalancerStatsServiceBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/MetricsServiceGrpc.java

@@ -91,6 +91,21 @@ public final class MetricsServiceGrpc {
     return MetricsServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static MetricsServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<MetricsServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<MetricsServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public MetricsServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new MetricsServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return MetricsServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -201,6 +216,46 @@ public final class MetricsServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service MetricsService.
    */
+  public static final class MetricsServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<MetricsServiceBlockingV2Stub> {
+    private MetricsServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected MetricsServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new MetricsServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Returns the values of all the gauges that are currently being maintained by
+     * the service
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.integration.Metrics.GaugeResponse>
+        getAllGauges(io.grpc.testing.integration.Metrics.EmptyMessage request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getGetAllGaugesMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns the value of one gauge
+     * </pre>
+     */
+    public io.grpc.testing.integration.Metrics.GaugeResponse getGauge(io.grpc.testing.integration.Metrics.GaugeRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetGaugeMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service MetricsService.
+   */
   public static final class MetricsServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<MetricsServiceBlockingStub> {
     private MetricsServiceBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/ReconnectServiceGrpc.java

@@ -94,6 +94,21 @@ public final class ReconnectServiceGrpc {
     return ReconnectServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ReconnectServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ReconnectServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ReconnectServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public ReconnectServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ReconnectServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ReconnectServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -202,6 +217,40 @@ public final class ReconnectServiceGrpc {
    * A service used to control reconnect server.
    * </pre>
    */
+  public static final class ReconnectServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ReconnectServiceBlockingV2Stub> {
+    private ReconnectServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ReconnectServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ReconnectServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty start(io.grpc.testing.integration.Messages.ReconnectParams request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getStartMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.Messages.ReconnectInfo stop(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getStopMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ReconnectService.
+   * <pre>
+   * A service used to control reconnect server.
+   * </pre>
+   */
   public static final class ReconnectServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ReconnectServiceBlockingStub> {
     private ReconnectServiceBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/TestServiceGrpc.java

@@ -281,6 +281,21 @@ public final class TestServiceGrpc {
     return TestServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static TestServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<TestServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public TestServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new TestServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return TestServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -551,6 +566,125 @@ public final class TestServiceGrpc {
    * performance with various types of payload.
    * </pre>
    */
+  public static final class TestServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingV2Stub> {
+    private TestServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected TestServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new TestServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * One empty request followed by one empty response.
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty emptyCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getEmptyCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.SimpleResponse unaryCall(io.grpc.testing.integration.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by one response. Response has cache control
+     * headers set such that a caching HTTP proxy (such as GFE) can
+     * satisfy subsequent requests.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.SimpleResponse cacheableUnaryCall(io.grpc.testing.integration.Messages.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getCacheableUnaryCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * One request followed by a sequence of responses (streamed download).
+     * The server returns the payload with client desired type and sizes.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        streamingOutputCall(io.grpc.testing.integration.Messages.StreamingOutputCallRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamingOutputCallMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * A sequence of requests followed by one response (streamed upload).
+     * The server returns the aggregated size of client payload as the result.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingInputCallRequest, io.grpc.testing.integration.Messages.StreamingInputCallResponse>
+        streamingInputCall() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getStreamingInputCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingOutputCallRequest, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        fullDuplexCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getFullDuplexCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.integration.Messages.StreamingOutputCallRequest, io.grpc.testing.integration.Messages.StreamingOutputCallResponse>
+        halfDuplexCall() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getHalfDuplexCallMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * The test server will not implement this method. It will be used
+     * to test the behavior when clients call unimplemented methods.
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty unimplementedCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnimplementedCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service TestService.
+   * <pre>
+   * A simple service to test the various types of RPCs and experiment with
+   * performance with various types of payload.
+   * </pre>
+   */
   public static final class TestServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<TestServiceBlockingStub> {
     private TestServiceBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/UnimplementedServiceGrpc.java

@@ -64,6 +64,21 @@ public final class UnimplementedServiceGrpc {
     return UnimplementedServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static UnimplementedServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<UnimplementedServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<UnimplementedServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public UnimplementedServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new UnimplementedServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return UnimplementedServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -167,6 +182,37 @@ public final class UnimplementedServiceGrpc {
    * that case.
    * </pre>
    */
+  public static final class UnimplementedServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<UnimplementedServiceBlockingV2Stub> {
+    private UnimplementedServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected UnimplementedServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new UnimplementedServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * A call that no server should implement
+     * </pre>
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty unimplementedCall(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnimplementedCallMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service UnimplementedService.
+   * <pre>
+   * A simple service NOT implemented at servers so clients can test for
+   * that case.
+   * </pre>
+   */
   public static final class UnimplementedServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<UnimplementedServiceBlockingStub> {
     private UnimplementedServiceBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/XdsUpdateClientConfigureServiceGrpc.java

@@ -63,6 +63,21 @@ public final class XdsUpdateClientConfigureServiceGrpc {
     return XdsUpdateClientConfigureServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static XdsUpdateClientConfigureServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<XdsUpdateClientConfigureServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<XdsUpdateClientConfigureServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public XdsUpdateClientConfigureServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new XdsUpdateClientConfigureServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return XdsUpdateClientConfigureServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -162,6 +177,36 @@ public final class XdsUpdateClientConfigureServiceGrpc {
    * A service to dynamically update the configuration of an xDS test client.
    * </pre>
    */
+  public static final class XdsUpdateClientConfigureServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<XdsUpdateClientConfigureServiceBlockingV2Stub> {
+    private XdsUpdateClientConfigureServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected XdsUpdateClientConfigureServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new XdsUpdateClientConfigureServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Update the tes client's configuration.
+     * </pre>
+     */
+    public io.grpc.testing.integration.Messages.ClientConfigureResponse configure(io.grpc.testing.integration.Messages.ClientConfigureRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getConfigureMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service XdsUpdateClientConfigureService.
+   * <pre>
+   * A service to dynamically update the configuration of an xDS test client.
+   * </pre>
+   */
   public static final class XdsUpdateClientConfigureServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<XdsUpdateClientConfigureServiceBlockingStub> {
     private XdsUpdateClientConfigureServiceBlockingStub(

interop-testing/src/generated/main/grpc/io/grpc/testing/integration/XdsUpdateHealthServiceGrpc.java

@@ -94,6 +94,21 @@ public final class XdsUpdateHealthServiceGrpc {
     return XdsUpdateHealthServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static XdsUpdateHealthServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<XdsUpdateHealthServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<XdsUpdateHealthServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public XdsUpdateHealthServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new XdsUpdateHealthServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return XdsUpdateHealthServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -202,6 +217,40 @@ public final class XdsUpdateHealthServiceGrpc {
    * A service to remotely control health status of an xDS test server.
    * </pre>
    */
+  public static final class XdsUpdateHealthServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<XdsUpdateHealthServiceBlockingV2Stub> {
+    private XdsUpdateHealthServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected XdsUpdateHealthServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new XdsUpdateHealthServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty setServing(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSetServingMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.grpc.testing.integration.EmptyProtos.Empty setNotServing(io.grpc.testing.integration.EmptyProtos.Empty request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getSetNotServingMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service XdsUpdateHealthService.
+   * <pre>
+   * A service to remotely control health status of an xDS test server.
+   * </pre>
+   */
   public static final class XdsUpdateHealthServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<XdsUpdateHealthServiceBlockingStub> {
     private XdsUpdateHealthServiceBlockingStub(

istio-interop-testing/src/generated/main/grpc/io/istio/test/EchoTestServiceGrpc.java

@@ -91,6 +91,21 @@ public final class EchoTestServiceGrpc {
     return EchoTestServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static EchoTestServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<EchoTestServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<EchoTestServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public EchoTestServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new EchoTestServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return EchoTestServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -187,6 +202,37 @@ public final class EchoTestServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service EchoTestService.
    */
+  public static final class EchoTestServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<EchoTestServiceBlockingV2Stub> {
+    private EchoTestServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected EchoTestServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new EchoTestServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.istio.test.Echo.EchoResponse echo(io.istio.test.Echo.EchoRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getEchoMethod(), getCallOptions(), request);
+    }
+
+    /**
+     */
+    public io.istio.test.Echo.ForwardEchoResponse forwardEcho(io.istio.test.Echo.ForwardEchoRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getForwardEchoMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service EchoTestService.
+   */
   public static final class EchoTestServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<EchoTestServiceBlockingStub> {
     private EchoTestServiceBlockingStub(

rls/src/generated/main/grpc/io/grpc/lookup/v1/RouteLookupServiceGrpc.java

@@ -60,6 +60,21 @@ public final class RouteLookupServiceGrpc {
     return RouteLookupServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static RouteLookupServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<RouteLookupServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<RouteLookupServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public RouteLookupServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new RouteLookupServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return RouteLookupServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -147,6 +162,33 @@ public final class RouteLookupServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service RouteLookupService.
    */
+  public static final class RouteLookupServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<RouteLookupServiceBlockingV2Stub> {
+    private RouteLookupServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected RouteLookupServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new RouteLookupServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Lookup returns a target for a single key.
+     * </pre>
+     */
+    public io.grpc.lookup.v1.RouteLookupResponse routeLookup(io.grpc.lookup.v1.RouteLookupRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getRouteLookupMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service RouteLookupService.
+   */
   public static final class RouteLookupServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<RouteLookupServiceBlockingStub> {
     private RouteLookupServiceBlockingStub(

s2a/src/generated/main/grpc/io/grpc/s2a/internal/handshaker/S2AServiceGrpc.java

@@ -60,6 +60,21 @@ public final class S2AServiceGrpc {
     return S2AServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static S2AServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<S2AServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<S2AServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public S2AServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new S2AServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return S2AServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -149,6 +164,36 @@ public final class S2AServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service S2AService.
    */
+  public static final class S2AServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<S2AServiceBlockingV2Stub> {
+    private S2AServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected S2AServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new S2AServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * SetUpSession is a bidirectional stream used by applications to offload
+     * operations from the TLS handshake.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.s2a.internal.handshaker.SessionReq, io.grpc.s2a.internal.handshaker.SessionResp>
+        setUpSession() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getSetUpSessionMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service S2AService.
+   */
   public static final class S2AServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<S2AServiceBlockingStub> {
     private S2AServiceBlockingStub(

services/src/generated/main/grpc/io/grpc/channelz/v1/ChannelzGrpc.java

@@ -250,6 +250,21 @@ public final class ChannelzGrpc {
     return ChannelzStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ChannelzBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ChannelzBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ChannelzBlockingV2Stub>() {
+        @java.lang.Override
+        public ChannelzBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ChannelzBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ChannelzBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -481,6 +496,98 @@ public final class ChannelzGrpc {
    * information.
    * </pre>
    */
+  public static final class ChannelzBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ChannelzBlockingV2Stub> {
+    private ChannelzBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ChannelzBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ChannelzBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Gets all root channels (i.e. channels the application has directly
+     * created). This does not include subchannels nor non-top level channels.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetTopChannelsResponse getTopChannels(io.grpc.channelz.v1.GetTopChannelsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetTopChannelsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Gets all servers that exist in the process.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetServersResponse getServers(io.grpc.channelz.v1.GetServersRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetServersMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns a single Server, or else a NOT_FOUND code.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetServerResponse getServer(io.grpc.channelz.v1.GetServerRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetServerMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Gets all server sockets that exist in the process.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetServerSocketsResponse getServerSockets(io.grpc.channelz.v1.GetServerSocketsRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetServerSocketsMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns a single Channel, or else a NOT_FOUND code.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetChannelResponse getChannel(io.grpc.channelz.v1.GetChannelRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetChannelMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns a single Subchannel, or else a NOT_FOUND code.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetSubchannelResponse getSubchannel(io.grpc.channelz.v1.GetSubchannelRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetSubchannelMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Returns a single Socket or else a NOT_FOUND code.
+     * </pre>
+     */
+    public io.grpc.channelz.v1.GetSocketResponse getSocket(io.grpc.channelz.v1.GetSocketRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getGetSocketMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service Channelz.
+   * <pre>
+   * Channelz is a service exposed by gRPC servers that provides detailed debug
+   * information.
+   * </pre>
+   */
   public static final class ChannelzBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ChannelzBlockingStub> {
     private ChannelzBlockingStub(

services/src/generated/main/grpc/io/grpc/health/v1/HealthGrpc.java

@@ -91,6 +91,21 @@ public final class HealthGrpc {
     return HealthStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static HealthBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<HealthBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<HealthBlockingV2Stub>() {
+        @java.lang.Override
+        public HealthBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new HealthBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return HealthBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -225,6 +240,58 @@ public final class HealthGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service Health.
    */
+  public static final class HealthBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<HealthBlockingV2Stub> {
+    private HealthBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected HealthBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new HealthBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * If the requested service is unknown, the call will fail with status
+     * NOT_FOUND.
+     * </pre>
+     */
+    public io.grpc.health.v1.HealthCheckResponse check(io.grpc.health.v1.HealthCheckRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getCheckMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * 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.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.health.v1.HealthCheckResponse>
+        watch(io.grpc.health.v1.HealthCheckRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getWatchMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service Health.
+   */
   public static final class HealthBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<HealthBlockingStub> {
     private HealthBlockingStub(

services/src/generated/main/grpc/io/grpc/reflection/v1/ServerReflectionGrpc.java

@@ -60,6 +60,21 @@ public final class ServerReflectionGrpc {
     return ServerReflectionStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ServerReflectionBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ServerReflectionBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ServerReflectionBlockingV2Stub>() {
+        @java.lang.Override
+        public ServerReflectionBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ServerReflectionBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ServerReflectionBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -149,6 +164,36 @@ public final class ServerReflectionGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service ServerReflection.
    */
+  public static final class ServerReflectionBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ServerReflectionBlockingV2Stub> {
+    private ServerReflectionBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ServerReflectionBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ServerReflectionBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * The reflection service is structured as a bidirectional stream, ensuring
+     * all related requests go to a single server.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.reflection.v1.ServerReflectionRequest, io.grpc.reflection.v1.ServerReflectionResponse>
+        serverReflectionInfo() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getServerReflectionInfoMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ServerReflection.
+   */
   public static final class ServerReflectionBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ServerReflectionBlockingStub> {
     private ServerReflectionBlockingStub(

services/src/generated/main/grpc/io/grpc/reflection/v1alpha/ServerReflectionGrpc.java

@@ -60,6 +60,21 @@ public final class ServerReflectionGrpc {
     return ServerReflectionStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ServerReflectionBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ServerReflectionBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ServerReflectionBlockingV2Stub>() {
+        @java.lang.Override
+        public ServerReflectionBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ServerReflectionBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ServerReflectionBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -149,6 +164,36 @@ public final class ServerReflectionGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service ServerReflection.
    */
+  public static final class ServerReflectionBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ServerReflectionBlockingV2Stub> {
+    private ServerReflectionBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ServerReflectionBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ServerReflectionBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * The reflection service is structured as a bidirectional stream, ensuring
+     * all related requests go to a single server.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.reflection.v1alpha.ServerReflectionRequest, io.grpc.reflection.v1alpha.ServerReflectionResponse>
+        serverReflectionInfo() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getServerReflectionInfoMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ServerReflection.
+   */
   public static final class ServerReflectionBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ServerReflectionBlockingStub> {
     private ServerReflectionBlockingStub(

services/src/generated/test/grpc/io/grpc/reflection/testing/AnotherDynamicServiceGrpc.java

@@ -63,6 +63,21 @@ public final class AnotherDynamicServiceGrpc {
     return AnotherDynamicServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static AnotherDynamicServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<AnotherDynamicServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<AnotherDynamicServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public AnotherDynamicServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new AnotherDynamicServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return AnotherDynamicServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -162,6 +177,36 @@ public final class AnotherDynamicServiceGrpc {
    * AnotherDynamicService
    * </pre>
    */
+  public static final class AnotherDynamicServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<AnotherDynamicServiceBlockingV2Stub> {
+    private AnotherDynamicServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected AnotherDynamicServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new AnotherDynamicServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * A method
+     * </pre>
+     */
+    public io.grpc.reflection.testing.DynamicReply method(io.grpc.reflection.testing.DynamicRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getMethodMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service AnotherDynamicService.
+   * <pre>
+   * AnotherDynamicService
+   * </pre>
+   */
   public static final class AnotherDynamicServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<AnotherDynamicServiceBlockingStub> {
     private AnotherDynamicServiceBlockingStub(

services/src/generated/test/grpc/io/grpc/reflection/testing/AnotherReflectableServiceGrpc.java

@@ -60,6 +60,21 @@ public final class AnotherReflectableServiceGrpc {
     return AnotherReflectableServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static AnotherReflectableServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<AnotherReflectableServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<AnotherReflectableServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public AnotherReflectableServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new AnotherReflectableServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return AnotherReflectableServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -141,6 +156,30 @@ public final class AnotherReflectableServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service AnotherReflectableService.
    */
+  public static final class AnotherReflectableServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<AnotherReflectableServiceBlockingV2Stub> {
+    private AnotherReflectableServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected AnotherReflectableServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new AnotherReflectableServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.reflection.testing.Reply method(io.grpc.reflection.testing.Request request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getMethodMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service AnotherReflectableService.
+   */
   public static final class AnotherReflectableServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<AnotherReflectableServiceBlockingStub> {
     private AnotherReflectableServiceBlockingStub(

services/src/generated/test/grpc/io/grpc/reflection/testing/DynamicServiceGrpc.java

@@ -63,6 +63,21 @@ public final class DynamicServiceGrpc {
     return DynamicServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static DynamicServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<DynamicServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<DynamicServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public DynamicServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new DynamicServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return DynamicServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -162,6 +177,36 @@ public final class DynamicServiceGrpc {
    * A DynamicService
    * </pre>
    */
+  public static final class DynamicServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<DynamicServiceBlockingV2Stub> {
+    private DynamicServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected DynamicServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new DynamicServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * A method
+     * </pre>
+     */
+    public io.grpc.reflection.testing.DynamicReply method(io.grpc.reflection.testing.DynamicRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getMethodMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service DynamicService.
+   * <pre>
+   * A DynamicService
+   * </pre>
+   */
   public static final class DynamicServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<DynamicServiceBlockingStub> {
     private DynamicServiceBlockingStub(

services/src/generated/test/grpc/io/grpc/reflection/testing/ReflectableServiceGrpc.java

@@ -60,6 +60,21 @@ public final class ReflectableServiceGrpc {
     return ReflectableServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ReflectableServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ReflectableServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ReflectableServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public ReflectableServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ReflectableServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ReflectableServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -141,6 +156,30 @@ public final class ReflectableServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service ReflectableService.
    */
+  public static final class ReflectableServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ReflectableServiceBlockingV2Stub> {
+    private ReflectableServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ReflectableServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ReflectableServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    public io.grpc.reflection.testing.Reply method(io.grpc.reflection.testing.Request request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getMethodMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ReflectableService.
+   */
   public static final class ReflectableServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ReflectableServiceBlockingStub> {
     private ReflectableServiceBlockingStub(

stub/src/main/java/io/grpc/stub/BlockingClientCall.java

@@ -0,0 +1,352 @@
+/*
+ * Copyright 2023 The gRPC Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.grpc.stub;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Predicate;
+import io.grpc.ClientCall;
+import io.grpc.ExperimentalApi;
+import io.grpc.Metadata;
+import io.grpc.Status;
+import io.grpc.StatusException;
+import io.grpc.stub.ClientCalls.ThreadSafeThreadlessExecutor;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Represents a bidirectional streaming call from a client.  Allows in a blocking manner, sending
+ * over the stream and receiving from the stream.  Also supports terminating the call.
+ * Wraps a ClientCall and converts from async communication to the sync paradigm used by the
+ * various blocking stream methods in {@link ClientCalls} which are used by the generated stubs.
+ *
+ * <p>Supports separate threads for reads and writes, but only 1 of each
+ *
+ * <p>Read methods consist of:
+ * <ul>
+ *   <li>{@link #read()}
+ *   <li>{@link #read(long timeout, TimeUnit unit)}
+ *   <li>{@link #hasNext()}
+ *   <li>{@link #cancel(String, Throwable)}
+ * </ul>
+ *
+ * <p>Write methods consist of:
+ * <ul>
+ *   <li>{@link #write(Object)}
+ *   <li>{@link #write(Object, long timeout, TimeUnit unit)}
+ *   <li>{@link #halfClose()}
+ * </ul>
+ *
+ * @param <ReqT> Type of the Request Message
+ * @param <RespT> Type of the Response Message
+ */
+@ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+public final class BlockingClientCall<ReqT, RespT> {
+
+  private static final Logger logger = Logger.getLogger(BlockingClientCall.class.getName());
+
+  private final BlockingQueue<RespT> buffer;
+  private final ClientCall<ReqT, RespT> call;
+
+  private final ThreadSafeThreadlessExecutor executor;
+
+  private boolean writeClosed;
+  private volatile Status closedStatus; // null if not closed
+
+  BlockingClientCall(ClientCall<ReqT, RespT> call, ThreadSafeThreadlessExecutor executor) {
+    this.call = call;
+    this.executor = executor;
+    buffer = new ArrayBlockingQueue<>(1);
+  }
+
+  /**
+   * Wait if necessary for a value to be available from the server. If there is an available value
+   * return it immediately, if the stream is closed return a null. Otherwise, wait for a value to be
+   * available or the stream to be closed
+   *
+   * @return value from server or null if stream has been closed
+   * @throws StatusException If the stream has closed in an error state
+   */
+  public RespT read() throws InterruptedException, StatusException {
+    try {
+      return read(true, 0, TimeUnit.NANOSECONDS);
+    } catch (TimeoutException e) {
+      throw new AssertionError("should never happen", e);
+    }
+  }
+
+  /**
+   * Wait with timeout, if necessary, for a value to be available from the server. If there is an
+   * available value, return it immediately.  If the stream is closed return a null. Otherwise, wait
+   * for a value to be available, the stream to be closed or the timeout to expire.
+   *
+   * @param timeout how long to wait before giving up.  Values &lt;= 0 are no wait
+   * @param unit a TimeUnit determining how to interpret the timeout parameter
+   * @return value from server or null (if stream has been closed)
+   * @throws TimeoutException if no read becomes ready before the specified timeout expires
+   * @throws StatusException If the stream has closed in an error state
+   */
+  public RespT read(long timeout, TimeUnit unit) throws InterruptedException, TimeoutException,
+      StatusException {
+    return read(false, timeout, unit);
+  }
+
+  private RespT read(boolean waitForever, long timeout, TimeUnit unit)
+      throws InterruptedException, TimeoutException, StatusException {
+    long start = System.nanoTime();
+    long end = start + unit.toNanos(timeout);
+
+    Predicate<BlockingClientCall<ReqT, RespT>> predicate = BlockingClientCall::skipWaitingForRead;
+    executor.waitAndDrainWithTimeout(waitForever, end, predicate, this);
+    RespT bufferedValue = buffer.poll();
+
+    if (logger.isLoggable(Level.FINER)) {
+      logger.finer("Client Blocking read had value:  " + bufferedValue);
+    }
+
+    Status currentClosedStatus;
+    if (bufferedValue != null) {
+      call.request(1);
+      return bufferedValue;
+    } else if ((currentClosedStatus = closedStatus) == null) {
+      throw new IllegalStateException(
+          "The message disappeared... are you reading from multiple threads?");
+    } else if (!currentClosedStatus.isOk()) {
+      throw currentClosedStatus.asException();
+    } else {
+      return null;
+    }
+  }
+
+  boolean skipWaitingForRead() {
+    return closedStatus != null || !buffer.isEmpty();
+  }
+
+  /**
+   * Wait for a value to be available from the server. If there is an
+   * available value, return true immediately.  If the stream was closed with Status.OK, return
+   * false.  If the stream was closed with an error status, throw a StatusException. Otherwise, wait
+   * for a value to be available or the stream to be closed.
+   *
+   * @return True when there is a value to read.  Return false if stream closed cleanly.
+   * @throws StatusException If the stream was closed in an error state
+   */
+  public boolean hasNext() throws InterruptedException, StatusException {
+    executor.waitAndDrain((x) -> !x.buffer.isEmpty() || x.closedStatus != null, this);
+
+    Status currentClosedStatus = closedStatus;
+    if (currentClosedStatus != null && !currentClosedStatus.isOk()) {
+      throw currentClosedStatus.asException();
+    }
+
+    return !buffer.isEmpty();
+  }
+
+  /**
+   * Send a value to the stream for sending to server, wait if necessary for the grpc stream to be
+   * ready.
+   *
+   * <p>If write is not legal at the time of call, immediately returns false
+   *
+   * <p><br><b>NOTE: </b>This method will return as soon as it passes the request to the grpc stream
+   * layer. It will not block while the message is being sent on the wire and returning true does
+   * not guarantee that the server gets the message.
+   *
+   * <p><br><b>WARNING: </b>Doing only writes without reads can lead to deadlocks.  This is because
+   * flow control, imposed by networks to protect intermediary routers and endpoints that are
+   * operating under resource constraints, requires reads to be done in order to progress writes.
+   * Furthermore, the server closing the stream will only be identified after
+   * the last sent value is read.
+   *
+   * @param request Message to send to the server
+   * @return true if the request is sent to stream, false if skipped
+   * @throws StatusException If the stream has closed in an error state
+   */
+  public boolean write(ReqT request) throws InterruptedException, StatusException {
+    try {
+      return write(true, request, Integer.MAX_VALUE, TimeUnit.DAYS);
+    } catch (TimeoutException e) {
+      throw new RuntimeException(e); // should never happen
+    }
+  }
+
+  /**
+   * Send a value to the stream for sending to server, wait if necessary for the grpc stream to be
+   * ready up to specified timeout.
+   *
+   * <p>If write is not legal at the time of call, immediately returns false
+   *
+   * <p><br><b>NOTE: </b>This method will return as soon as it passes the request to the grpc stream
+   * layer. It will not block while the message is being sent on the wire and returning true does
+   * not guarantee that the server gets the message.
+   *
+   * <p><br><b>WARNING: </b>Doing only writes without reads can lead to deadlocks as a result of
+   * flow control.  Furthermore, the server closing the stream will only be identified after the
+   * last sent value is read.
+   *
+   * @param request Message to send to the server
+   * @param timeout How long to wait before giving up.  Values &lt;= 0 are no wait
+   * @param unit A TimeUnit determining how to interpret the timeout parameter
+   * @return true if the request is sent to stream, false if skipped
+   * @throws TimeoutException if write does not become ready before the specified timeout expires
+   * @throws StatusException If the stream has closed in an error state
+   */
+  public boolean write(ReqT request, long timeout, TimeUnit unit)
+      throws InterruptedException, TimeoutException, StatusException {
+    return write(false, request, timeout, unit);
+  }
+
+  private boolean write(boolean waitForever, ReqT request, long timeout, TimeUnit unit)
+      throws InterruptedException, TimeoutException, StatusException {
+
+    if (writeClosed) {
+      throw new IllegalStateException("Writes cannot be done after calling halfClose or cancel");
+    }
+
+    long end = System.nanoTime() + unit.toNanos(timeout);
+
+    Predicate<BlockingClientCall<ReqT, RespT>> predicate =
+        (x) -> x.call.isReady() || x.closedStatus != null;
+    executor.waitAndDrainWithTimeout(waitForever, end, predicate, this);
+    Status savedClosedStatus = closedStatus;
+    if (savedClosedStatus == null) {
+      call.sendMessage(request);
+      return true;
+    } else if (savedClosedStatus.isOk()) {
+      return false;
+    } else {
+      // Propagate any errors returned from the server
+      throw savedClosedStatus.asException();
+    }
+  }
+
+  void sendSingleRequest(ReqT request) {
+    call.sendMessage(request);
+  }
+
+  /**
+   * Cancel stream and stop any further writes.  Note that some reads that are in flight may still
+   * happen after the cancel.
+   *
+   * @param message if not {@code null}, will appear as the description of the CANCELLED status
+   * @param cause if not {@code null}, will appear as the cause of the CANCELLED status
+   */
+  public void cancel(String message, Throwable cause) {
+    writeClosed = true;
+    call.cancel(message, cause);
+  }
+
+  /**
+   * Indicate that no more writes will be done and the stream will be closed from the client side.
+   *
+   * @see ClientCall#halfClose()
+   */
+  public void halfClose() {
+    if (writeClosed) {
+      throw new IllegalStateException(
+          "halfClose cannot be called after already half closed or cancelled");
+    }
+
+    writeClosed = true;
+    call.halfClose();
+  }
+
+  /**
+   * Status that server sent when closing channel from its side.
+   *
+   * @return null if stream not closed by server, otherwise Status sent by server
+   */
+  @VisibleForTesting
+  Status getClosedStatus() {
+    drainQuietly();
+    return closedStatus;
+  }
+
+  /**
+   * Check for whether some action is ready.
+   *
+   * @return True if legal to write and writeOrRead can run without blocking
+   */
+  @VisibleForTesting
+  boolean isEitherReadOrWriteReady() {
+    return (isWriteLegal() && isWriteReady()) || isReadReady();
+  }
+
+  /**
+   * Check whether there are any values waiting to be read.
+   *
+   * @return true if read will not block
+   */
+  @VisibleForTesting
+  boolean isReadReady() {
+    drainQuietly();
+
+    return !buffer.isEmpty();
+  }
+
+  /**
+   * Check that write hasn't been marked complete and stream is ready to receive a write (so will
+   * not block).
+   *
+   * @return true if legal to write and write will not block
+   */
+  @VisibleForTesting
+  boolean isWriteReady() {
+    drainQuietly();
+
+    return isWriteLegal() && call.isReady();
+  }
+
+  /**
+   * Check whether we'll ever be able to do writes or should terminate.
+   * @return True if writes haven't been closed and the server hasn't closed the stream
+   */
+  private boolean isWriteLegal() {
+    return !writeClosed && closedStatus == null;
+  }
+
+  ClientCall.Listener<RespT> getListener() {
+    return new QueuingListener();
+  }
+
+  private void drainQuietly() {
+    try {
+      executor.drain();
+    } catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+    }
+  }
+
+  private final class QueuingListener extends ClientCall.Listener<RespT> {
+    @Override
+    public void onMessage(RespT value) {
+      Preconditions.checkState(closedStatus == null, "ClientCall already closed");
+      buffer.add(value);
+    }
+
+    @Override
+    public void onClose(Status status, Metadata trailers) {
+      Preconditions.checkState(closedStatus == null, "ClientCall already closed");
+      closedStatus = status;
+    }
+  }
+
+}

stub/src/main/java/io/grpc/stub/ClientCalls.java

@@ -22,12 +22,14 @@ import static com.google.common.base.Preconditions.checkState;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Preconditions;
+import com.google.common.base.Predicate;
 import com.google.common.base.Strings;
 import com.google.common.util.concurrent.AbstractFuture;
 import com.google.common.util.concurrent.ListenableFuture;
 import io.grpc.CallOptions;
 import io.grpc.Channel;
 import io.grpc.ClientCall;
+import io.grpc.ExperimentalApi;
 import io.grpc.Metadata;
 import io.grpc.MethodDescriptor;
 import io.grpc.Status;
@@ -42,9 +44,14 @@ import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Future;
 import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.LockSupport;
+import java.util.concurrent.locks.ReentrantLock;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
 /**
@@ -184,7 +191,6 @@ public final class ClientCalls {
    *
    * @return an iterator over the response stream.
    */
-  // TODO(louiscryan): Not clear if we want to use this idiom for 'simple' stubs.
   public static <ReqT, RespT> Iterator<RespT> blockingServerStreamingCall(
       ClientCall<ReqT, RespT> call, ReqT req) {
     BlockingResponseStream<RespT> result = new BlockingResponseStream<>(call);
@@ -194,11 +200,12 @@ public final class ClientCalls {
 
   /**
    * Executes a server-streaming call returning a blocking {@link Iterator} over the
-   * response stream.  The {@code call} should not be already started.  After calling this method,
-   * {@code call} should no longer be used.
+   * response stream.
    *
    * <p>The returned iterator may throw {@link StatusRuntimeException} on error.
    *
+   * <p>Warning:  the iterator can result in leaks if not completely consumed.
+   *
    * @return an iterator over the response stream.
    */
   public static <ReqT, RespT> Iterator<RespT> blockingServerStreamingCall(
@@ -211,6 +218,82 @@ public final class ClientCalls {
     return result;
   }
 
+  /**
+   * Initiates a client streaming call over the specified channel.  It returns an
+   * object which can be used in a blocking manner to retrieve responses..
+   *
+   * <p>The methods {@link BlockingClientCall#hasNext()} and {@link
+   * BlockingClientCall#cancel(String, Throwable)} can be used for more extensive control.
+   *
+   * @return A {@link BlockingClientCall} that has had the request sent and halfClose called
+   */
+  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+  public static <ReqT, RespT> BlockingClientCall<ReqT, RespT> blockingV2ServerStreamingCall(
+      Channel channel, MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, ReqT req) {
+    BlockingClientCall<ReqT, RespT> call =
+        blockingBidiStreamingCall(channel, method, callOptions);
+
+    call.sendSingleRequest(req);
+    call.halfClose();
+    return call;
+  }
+
+  /**
+   * Initiates a server streaming call and sends the specified request to the server.  It returns an
+   * object which can be used in a blocking manner to retrieve values from the server.  After the
+   * last value has been read, the next read call will return null.
+   *
+   * <p>Call {@link BlockingClientCall#read()} for
+   * retrieving values.  A {@code null} will be returned after the server has closed the stream.
+   *
+   * <p>The methods {@link BlockingClientCall#hasNext()} and {@link
+   * BlockingClientCall#cancel(String, Throwable)} can be used for more extensive control.
+   *
+   * <p><br> Example usage:
+   * <pre> {@code  while ((response = call.read()) != null) { ... } } </pre>
+   * or
+   * <pre> {@code
+   *   while (call.hasNext()) {
+   *     response = call.read();
+   *     ...
+   *   }
+   * } </pre>
+   *
+   * <p>Note that this paradigm is different from the original
+   * {@link #blockingServerStreamingCall(Channel, MethodDescriptor, CallOptions, Object)}
+   * which returns an iterator, which would leave the stream open if not completely consumed.
+   *
+   * @return A {@link BlockingClientCall} which can be used by the client to write and receive
+   *     messages over the grpc channel.
+   */
+  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+  public static <ReqT, RespT> BlockingClientCall<ReqT, RespT> blockingClientStreamingCall(
+      Channel channel, MethodDescriptor<ReqT, RespT> method, CallOptions callOptions) {
+    return blockingBidiStreamingCall(channel, method, callOptions);
+  }
+
+  /**
+   * Initiate a bidirectional-streaming {@link ClientCall} and returning a stream object
+   * ({@link BlockingClientCall}) which can be used by the client to send and receive messages over
+   * the grpc channel.
+   *
+   * @return an object representing the call which can be used to read, write and terminate it.
+   */
+  @ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+  public static <ReqT, RespT> BlockingClientCall<ReqT, RespT> blockingBidiStreamingCall(
+      Channel channel, MethodDescriptor<ReqT, RespT> method, CallOptions callOptions) {
+    ThreadSafeThreadlessExecutor executor = new ThreadSafeThreadlessExecutor();
+    ClientCall<ReqT, RespT> call = channel.newCall(method, callOptions.withExecutor(executor));
+
+    BlockingClientCall<ReqT, RespT> blockingClientCall = new BlockingClientCall<>(call, executor);
+
+    // Get the call started
+    call.start(blockingClientCall.getListener(), new Metadata());
+    call.request(1);
+
+    return blockingClientCall;
+  }
+
   /**
    * Executes a unary call and returns a {@link ListenableFuture} to the response.  The
    * {@code call} should not be already started.  After calling this method, {@code call} should no
@@ -414,7 +497,7 @@ public final class ClientCalls {
     public void request(int count) {
       if (!streamingResponse && count == 1) {
         // Initially ask for two responses from flow-control so that if a misbehaving server
-        // sends more than one responses, we can catch it and fail it in the listener.
+        // sends more than one response, we can catch it and fail it in the listener.
         call.request(2);
       } else {
         call.request(count);
@@ -637,7 +720,7 @@ public final class ClientCalls {
     public T next() {
       // Eagerly call request(1) so it can be processing the next message while we wait for the
       // current one, which reduces latency for the next message. With MigratingThreadDeframer and
-      // if the data has already been recieved, every other message can be delivered instantly. This
+      // if the data has already been received, every other message can be delivered instantly. This
       // can be run after hasNext(), but just would be slower.
       if (!(last instanceof StatusRuntimeException) && last != this) {
         call.request(1);
@@ -726,6 +809,12 @@ public final class ClientCalls {
       } while ((runnable = poll()) != null);
     }
 
+    private static void throwIfInterrupted() throws InterruptedException {
+      if (Thread.interrupted()) {
+        throw new InterruptedException();
+      }
+    }
+
     /**
      * Called after final call to {@link #waitAndDrain()}, from same thread.
      */
@@ -745,12 +834,6 @@ public final class ClientCalls {
       }
     }
 
-    private static void throwIfInterrupted() throws InterruptedException {
-      if (Thread.interrupted()) {
-        throw new InterruptedException();
-      }
-    }
-
     @Override
     public void execute(Runnable runnable) {
       add(runnable);
@@ -763,6 +846,131 @@ public final class ClientCalls {
     }
   }
 
+  @SuppressWarnings("serial")
+  static final class ThreadSafeThreadlessExecutor extends ConcurrentLinkedQueue<Runnable>
+      implements Executor {
+    private static final Logger log =
+        Logger.getLogger(ThreadSafeThreadlessExecutor.class.getName());
+
+    private final Lock waiterLock = new ReentrantLock();
+    private final Condition waiterCondition = waiterLock.newCondition();
+
+    // Non private to avoid synthetic class
+    ThreadSafeThreadlessExecutor() {}
+
+    /**
+     * Waits until there is a Runnable, then executes it and all queued Runnables after it.
+     */
+    public <T> void waitAndDrain(Predicate<T> predicate, T testTarget) throws InterruptedException {
+      try {
+        waitAndDrainWithTimeout(true, 0, predicate, testTarget);
+      } catch (TimeoutException e) {
+        throw new AssertionError(e); // Should never happen
+      }
+    }
+
+    /**
+     * Waits for up to specified nanoseconds until there is a Runnable, then executes it and all
+     * queued Runnables after it.
+     *
+     * <p>his should always be called in a loop that checks whether the reason we are waiting has
+     * been satisfied.</p>T
+     *
+     * @param waitForever ignore the rest of the arguments and wait until there is a task to run
+     * @param end System.nanoTime() to stop waiting if haven't been woken up yet
+     * @param predicate non-null condition to test for skipping wake or waking up threads
+     * @param testTarget object to pass to predicate
+     */
+    public <T> void waitAndDrainWithTimeout(boolean waitForever, long end,
+                                            @Nonnull Predicate<T> predicate, T testTarget)
+        throws InterruptedException, TimeoutException {
+      throwIfInterrupted();
+      Runnable runnable;
+
+      while (!predicate.apply(testTarget)) {
+        waiterLock.lock();
+        try {
+          while ((runnable = poll()) == null) {
+            if (predicate.apply(testTarget)) {
+              return; // The condition for which we were waiting is now satisfied
+            }
+
+            if (waitForever) {
+              waiterCondition.await();
+            } else {
+              long waitNanos = end - System.nanoTime();
+              if (waitNanos <= 0) {
+                throw new TimeoutException(); // Deadline is expired
+              }
+              waiterCondition.awaitNanos(waitNanos);
+            }
+          }
+        } finally {
+          waiterLock.unlock();
+        }
+
+        do {
+          runQuietly(runnable);
+        } while ((runnable = poll()) != null);
+        // Wake everything up now that we've done something and they can check in their outer loop
+        // if they can continue or need to wait again.
+        signallAll();
+      }
+    }
+
+    /**
+     * Executes all queued Runnables and if there were any wakes up any waiting threads.
+     */
+    public void drain() throws InterruptedException {
+      throwIfInterrupted();
+      Runnable runnable;
+      boolean didWork = false;
+
+      while ((runnable = poll()) != null) {
+        runQuietly(runnable);
+        didWork = true;
+      }
+
+      if (didWork) {
+        signallAll();
+      }
+    }
+
+    private void signallAll() {
+      waiterLock.lock();
+      try {
+        waiterCondition.signalAll();
+      } finally {
+        waiterLock.unlock();
+      }
+    }
+
+    private static void runQuietly(Runnable runnable) {
+      try {
+        runnable.run();
+      } catch (Throwable t) {
+        log.log(Level.WARNING, "Runnable threw exception", t);
+      }
+    }
+
+    private static void throwIfInterrupted() throws InterruptedException {
+      if (Thread.interrupted()) {
+        throw new InterruptedException();
+      }
+    }
+
+    @Override
+    public void execute(Runnable runnable) {
+      waiterLock.lock();
+      try {
+        add(runnable);
+        waiterCondition.signalAll(); // If anything is waiting let it wake up and process this task
+      } finally {
+        waiterLock.unlock();
+      }
+    }
+  }
+
   enum StubType {
     BLOCKING, FUTURE, ASYNC
   }

stub/src/test/java/io/grpc/stub/BlockingClientCallTest.java

@@ -0,0 +1,520 @@
+/*
+ * Copyright 2023 The gRPC Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.grpc.stub;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import io.grpc.CallOptions;
+import io.grpc.ManagedChannel;
+import io.grpc.MethodDescriptor;
+import io.grpc.MethodDescriptor.MethodType;
+import io.grpc.Server;
+import io.grpc.ServerServiceDefinition;
+import io.grpc.ServiceDescriptor;
+import io.grpc.Status;
+import io.grpc.Status.Code;
+import io.grpc.StatusException;
+import io.grpc.inprocess.InProcessChannelBuilder;
+import io.grpc.inprocess.InProcessServerBuilder;
+import io.grpc.stub.ServerCalls.BidiStreamingMethod;
+import io.grpc.stub.ServerCallsTest.IntegerMarshaller;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.logging.Logger;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+@RunWith(JUnit4.class)
+public class BlockingClientCallTest {
+  private static final Logger logger = Logger.getLogger(BlockingClientCallTest.class.getName());
+
+  public static final int DELAY_MILLIS = 2000;
+  public static final long DELAY_NANOS = TimeUnit.MILLISECONDS.toNanos(DELAY_MILLIS);
+  private static final MethodDescriptor<Integer, Integer> BIDI_STREAMING_METHOD =
+      MethodDescriptor.<Integer, Integer>newBuilder()
+          .setType(MethodType.BIDI_STREAMING)
+          .setFullMethodName("some/method")
+          .setRequestMarshaller(new IntegerMarshaller())
+          .setResponseMarshaller(new IntegerMarshaller())
+          .build();
+
+  private Server server;
+
+  private ManagedChannel channel;
+
+  private IntegerTestMethod testMethod;
+  private BlockingClientCall<Integer, Integer> biDiStream;
+
+  @Before
+  public void setUp() throws Exception {
+    testMethod = new IntegerTestMethod();
+
+    ServerServiceDefinition service = ServerServiceDefinition.builder(
+            new ServiceDescriptor("some", BIDI_STREAMING_METHOD))
+        .addMethod(BIDI_STREAMING_METHOD, ServerCalls.asyncBidiStreamingCall(testMethod))
+        .build();
+    long tag = System.nanoTime();
+
+    server = InProcessServerBuilder.forName("go-with-the-flow" + tag).directExecutor()
+        .addService(service).build().start();
+
+    channel = InProcessChannelBuilder.forName("go-with-the-flow" + tag).directExecutor().build();
+  }
+
+  @After
+  public void tearDown() {
+    if (server != null) {
+      server.shutdownNow();
+    }
+    if (channel != null) {
+      channel.shutdownNow();
+    }
+    if (biDiStream != null) {
+      biDiStream.cancel("In teardown", null);
+    }
+  }
+
+  @Test
+  public void sanityTest() throws Exception {
+    Integer req = 2;
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    //  verify activity ready
+    assertTrue(biDiStream.isEitherReadOrWriteReady());
+    assertTrue(biDiStream.isWriteReady());
+
+    // Have server send a value
+    testMethod.sendValueToClient(10);
+
+    // Do a writeOrRead
+    biDiStream.write(req, 3, TimeUnit.SECONDS);
+    assertEquals(Integer.valueOf(10), biDiStream.read(DELAY_MILLIS, TimeUnit.MILLISECONDS));
+
+    // mark complete
+    biDiStream.halfClose();
+    assertNull(biDiStream.read(2, TimeUnit.SECONDS));
+
+    // verify activity !ready and !writeable
+    assertFalse(biDiStream.isEitherReadOrWriteReady());
+    assertFalse(biDiStream.isWriteReady());
+
+    assertEquals(Code.OK, biDiStream.getClosedStatus().getCode());
+  }
+
+  @Test
+  public void testReadSuccess_withoutBlocking() throws Exception {
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    // Have server push a value
+    testMethod.sendValueToClient(11);
+
+    long start = System.nanoTime();
+    Integer value = biDiStream.read(100, TimeUnit.SECONDS);
+    assertNotNull(value);
+    long timeTaken = System.nanoTime() - start;
+    assertThat(timeTaken).isLessThan(TimeUnit.MILLISECONDS.toNanos(100));
+  }
+
+  @Test
+  public void testReadSuccess_withBlocking() throws Exception {
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    try {
+      biDiStream.read(1, TimeUnit.SECONDS);
+      fail("Expected timeout");
+    } catch (TimeoutException t) {
+      // ignore
+    }
+
+    long start = System.nanoTime();
+    delayedAddValue(DELAY_MILLIS, 12);
+    assertNotNull(biDiStream.read(DELAY_MILLIS * 2, TimeUnit.MILLISECONDS));
+    long timeTaken = System.nanoTime() - start;
+    assertThat(timeTaken).isGreaterThan(DELAY_NANOS);
+    assertThat(timeTaken).isLessThan(DELAY_NANOS * 2);
+
+    start = System.nanoTime();
+    Integer[] values = {13, 14, 15, 16};
+    delayedAddValue(DELAY_MILLIS, values);
+    for (Integer value : values) {
+      Integer readValue = biDiStream.read(DELAY_MILLIS * 2, TimeUnit.MILLISECONDS);
+      assertEquals(value, readValue);
+    }
+    timeTaken = System.nanoTime() - start;
+    assertThat(timeTaken).isLessThan(DELAY_NANOS * 2);
+    assertThat(timeTaken).isAtLeast(DELAY_NANOS);
+
+    start = System.nanoTime();
+    delayedVoidMethod(100, testMethod::halfClose);
+    assertNull(biDiStream.read(DELAY_MILLIS * 2, TimeUnit.MILLISECONDS));
+    timeTaken = System.nanoTime() - start;
+    assertThat(timeTaken).isLessThan(DELAY_NANOS);
+  }
+
+  @Test
+  public void testCancel() throws Exception {
+    testMethod.disableAutoRequest();
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    // read terminated
+    long start = System.currentTimeMillis();
+    delayedCancel(biDiStream, "cancel read");
+    try {
+      assertNull(biDiStream.read(2 * DELAY_MILLIS, TimeUnit.MILLISECONDS));
+      fail("No exception thrown by read after cancel");
+    } catch (StatusException e) {
+      assertEquals(Status.CANCELLED.getCode(), e.getStatus().getCode());
+      assertThat(System.currentTimeMillis() - start).isLessThan(2 * DELAY_MILLIS);
+    }
+
+    // write terminated
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+    start = System.currentTimeMillis();
+    delayedCancel(biDiStream, "cancel write");
+
+    // Write interrupted by cancel
+    try {
+      assertFalse(biDiStream.write(30)); // this is interrupted by cancel
+      fail("No exception thrown when write was interrupted by cancel");
+    } catch (StatusException e) {
+      assertEquals(Status.CANCELLED.getCode(), e.getStatus().getCode());
+    }
+
+    // Write after cancel
+    try {
+      start = System.currentTimeMillis();
+      biDiStream.write(30);
+      fail("No exception doing write after cancel");
+    } catch (IllegalStateException e) {
+      assertThat(System.currentTimeMillis() - start).isLessThan(200);
+      assertThat(e.getMessage()).contains("cancel");
+    }
+
+    // new read after cancel immediately throws an exception
+    try {
+      start = System.currentTimeMillis();
+      assertNull(biDiStream.read(2, TimeUnit.SECONDS));
+    } catch (StatusException e) {
+      assertEquals(Status.CANCELLED.getCode(), e.getStatus().getCode());
+      assertThat(System.currentTimeMillis() - start).isLessThan(200);
+    }
+
+  }
+
+  @Test
+  public void testIsActivityReady() throws Exception {
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    // write only ready
+    assertTrue(biDiStream.isEitherReadOrWriteReady());
+    assertTrue(biDiStream.isWriteReady());
+    assertFalse(biDiStream.isReadReady());
+
+    // both ready
+    testMethod.sendValueToClient(40);
+    assertTrue(biDiStream.isEitherReadOrWriteReady());
+    assertTrue(biDiStream.isReadReady());
+    assertTrue(biDiStream.isWriteReady());
+
+    // read only ready
+    biDiStream.halfClose();
+    assertTrue(biDiStream.isEitherReadOrWriteReady());
+    assertTrue(biDiStream.isReadReady());
+    assertFalse(biDiStream.isWriteReady());
+
+    // Neither ready
+    assertNotNull(biDiStream.read(1, TimeUnit.MILLISECONDS));
+    assertFalse(biDiStream.isEitherReadOrWriteReady());
+    assertFalse(biDiStream.isReadReady());
+    assertFalse(biDiStream.isWriteReady());
+  }
+
+  @Test
+  public void testWriteSuccess_withBlocking() throws Exception {
+    testMethod.disableAutoRequest();
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    assertFalse(biDiStream.isWriteReady());
+    delayedWriteEnable(500);
+    assertTrue(biDiStream.write(40));
+
+    delayedWriteEnable(500);
+    assertTrue(biDiStream.write(41, 0, TimeUnit.NANOSECONDS));
+  }
+
+
+  @Test
+  public void testReadNonblocking_whenWriteBlocked() throws Exception {
+    testMethod.disableAutoRequest();
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    // One value waiting
+    testMethod.sendValueToClient(50);
+    long start = System.currentTimeMillis();
+    assertEquals(Integer.valueOf(50), biDiStream.read());
+    assertThat(System.currentTimeMillis() - start).isLessThan(DELAY_MILLIS);
+
+    // Two values waiting
+    start = System.currentTimeMillis();
+    testMethod.sendValuesToClient(51, 52);
+    assertEquals(Integer.valueOf(51), biDiStream.read());
+    assertEquals(Integer.valueOf(52), biDiStream.read());
+    assertThat(System.currentTimeMillis() - start).isLessThan(DELAY_MILLIS);
+  }
+
+  @Test
+  public void testReadsAndWritesInterleaved_withBlocking() throws Exception {
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    Integer[] valuesOut = {1001, 10022, 1003};
+    Integer[] valuesIn = new Integer[valuesOut.length];
+    delayedAddValue(300, valuesOut);
+    int iteration = 0;
+    for (int i = 0; i < valuesOut.length && iteration++ < (20 + valuesOut.length); ) {
+      try {
+        if ((valuesIn[i] = biDiStream.read(50, TimeUnit.MILLISECONDS)) != null) {
+          i++;
+        }
+      } catch (TimeoutException e) {
+        logger.info("Read timed out for " + i);
+      }
+    }
+    assertArrayEquals(valuesOut, valuesIn);
+  }
+
+  @Test
+  public void testReadsAndWritesInterleaved_BlockingWrites() throws Exception {
+    testMethod.disableAutoRequest();
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel, BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    testMethod.sendValuesToClient(10, 11, 12);
+    delayedWriteEnable(500);
+    long start = System.currentTimeMillis();
+    boolean done = false;
+    int count = 0;
+    while (!done) {
+      count++;
+      if (!biDiStream.isWriteReady() && biDiStream.isReadReady()) {
+        biDiStream.read(100, TimeUnit.MILLISECONDS);
+      } else {
+        done = biDiStream.write(100, 1, TimeUnit.SECONDS);
+      }
+    }
+    assertEquals(4, count);
+    assertThat(System.currentTimeMillis() - start).isLessThan(700);
+
+    testMethod.sendValuesToClient(20, 21, 22);
+    delayedWriteEnable(100);
+    while (!biDiStream.isWriteReady()) {
+      Thread.sleep(20);
+    }
+
+    assertTrue(biDiStream.write(1000, 2 * DELAY_MILLIS, TimeUnit.MILLISECONDS));
+
+    assertEquals(Integer.valueOf(20), biDiStream.read(200, TimeUnit.MILLISECONDS));
+    assertEquals(Integer.valueOf(21), biDiStream.read(200, TimeUnit.MILLISECONDS));
+    assertEquals(Integer.valueOf(22), biDiStream.read(200, TimeUnit.MILLISECONDS));
+    try {
+      Integer value = biDiStream.read(200, TimeUnit.MILLISECONDS);
+      fail("Unexpected read success instead of timeout.  Value was: " + value);
+    } catch (TimeoutException ignore) {
+      // ignore since expected
+    }
+  }
+
+  @Test
+  public void testWriteCompleted() throws Exception {
+    testMethod.disableAutoRequest();
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    // Verify pending write released
+    long start = System.currentTimeMillis();
+    delayedVoidMethod(DELAY_MILLIS, biDiStream::halfClose);
+    assertFalse(biDiStream.write(1)); // should block until writeComplete is triggered
+    long end = System.currentTimeMillis();
+    assertThat(end - start).isAtLeast(DELAY_MILLIS);
+
+    // verify new writes throw an illegalStateException
+    try {
+      assertFalse(biDiStream.write(2));
+      fail("write did not throw an exception when called after halfClose");
+    } catch (IllegalStateException e) {
+      assertThat(e.getMessage()).containsMatch("after.*halfClose.*cancel");
+    }
+
+    // verify pending write with timeout released
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+    delayedVoidMethod(DELAY_MILLIS, biDiStream::halfClose);
+    assertFalse(biDiStream.write(3, 2 * DELAY_MILLIS, TimeUnit.MILLISECONDS));
+  }
+
+  @Test
+  public void testClose_withException() throws Exception {
+    biDiStream = ClientCalls.blockingBidiStreamingCall(channel,  BIDI_STREAMING_METHOD,
+        CallOptions.DEFAULT);
+
+    String descr = "too many small numbers";
+    testMethod.sendError(
+        Status.FAILED_PRECONDITION.withDescription(descr).asRuntimeException());
+    Status closedStatus = biDiStream.getClosedStatus();
+    assertEquals(Code.FAILED_PRECONDITION, closedStatus.getCode());
+    assertEquals(descr, closedStatus.getDescription());
+    try {
+      assertFalse(biDiStream.write(1));
+    } catch (StatusException e) {
+      assertThat(e.getMessage()).startsWith("FAILED_PRECONDITION");
+    }
+  }
+
+  private void delayedAddValue(int delayMillis, Integer... values) {
+    new Thread("delayedAddValue " + values.length) {
+      @Override
+      public void run() {
+        try {
+          Thread.sleep(delayMillis);
+          for (Integer cur : values) {
+            testMethod.sendValueToClient(cur);
+          }
+        } catch (InterruptedException e) {
+          throw new RuntimeException(e);
+        }
+      }
+    }.start();
+  }
+
+  public interface Thunk { void apply(); } // supports passing void method w/out args
+
+  private void delayedVoidMethod(int delayMillis, Thunk method) {
+    new Thread("delayedHalfClose") {
+      @Override
+      public void run() {
+        try {
+          Thread.sleep(delayMillis);
+          method.apply();
+        } catch (InterruptedException e) {
+          throw new RuntimeException(e);
+        }
+      }
+    }.start();
+  }
+
+  private void delayedWriteEnable(int delayMillis) {
+    delayedVoidMethod(delayMillis, testMethod::readValueFromClient);
+  }
+
+  private void delayedCancel(BlockingClientCall<Integer, Integer> biDiStream, String message) {
+    new Thread("delayedCancel") {
+      @Override
+      public void run() {
+        try {
+          Thread.sleep(BlockingClientCallTest.DELAY_MILLIS);
+          biDiStream.cancel(message, new RuntimeException("Test requested close"));
+        } catch (InterruptedException e) {
+          throw new RuntimeException(e);
+        }
+      }
+    }.start();
+  }
+
+  private static class IntegerTestMethod implements BidiStreamingMethod<Integer, Integer> {
+    boolean autoRequest = true;
+
+    void disableAutoRequest() {
+      assertNull("Can't disable auto request after invoke has been called", serverCallObserver);
+      autoRequest = false;
+    }
+
+    ServerCallStreamObserver<Integer> serverCallObserver;
+
+    @Override
+    public StreamObserver<Integer> invoke(StreamObserver<Integer> responseObserver) {
+      serverCallObserver = (ServerCallStreamObserver<Integer>) responseObserver;
+      if (!autoRequest) {
+        serverCallObserver.disableAutoRequest();
+      }
+
+      return new StreamObserver<Integer>() {
+        @Override
+        public void onNext(Integer value) {
+          if (!autoRequest) {
+            serverCallObserver.request(1);
+          }
+
+          // For testing ReqResp actions
+          if (value > 1000) {
+            serverCallObserver.onNext(value);
+          }
+        }
+
+        @Override
+        public void onError(Throwable t) {
+          // no-op
+        }
+
+        @Override
+        public void onCompleted() {
+          serverCallObserver.onCompleted();
+        }
+      };
+    }
+
+    void readValueFromClient() {
+      serverCallObserver.request(1);
+    }
+
+    void sendValueToClient(int value) {
+      serverCallObserver.onNext(value);
+    }
+
+    private void sendValuesToClient(int ...values) {
+      for (int cur : values) {
+        sendValueToClient(cur);
+      }
+    }
+
+    void halfClose() {
+      serverCallObserver.onCompleted();
+    }
+
+    void sendError(Throwable t) {
+      serverCallObserver.onError(t);
+    }
+  }
+
+}

stub/src/test/java/io/grpc/stub/ClientCallsTest.java

@@ -971,8 +971,8 @@ public class ClientCallsTest {
         }
 
         @Override public void halfClose() {
-          Thread.currentThread().interrupt();
           super.halfClose();
+          Thread.currentThread().interrupt();
         }
       };
     }

testing-proto/src/generated/main/grpc/io/grpc/testing/protobuf/SimpleServiceGrpc.java

@@ -156,6 +156,21 @@ public final class SimpleServiceGrpc {
     return SimpleServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static SimpleServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<SimpleServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<SimpleServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public SimpleServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new SimpleServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return SimpleServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -318,6 +333,72 @@ public final class SimpleServiceGrpc {
    * A simple service for test.
    * </pre>
    */
+  public static final class SimpleServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<SimpleServiceBlockingV2Stub> {
+    private SimpleServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected SimpleServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new SimpleServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Simple unary RPC.
+     * </pre>
+     */
+    public io.grpc.testing.protobuf.SimpleResponse unaryRpc(io.grpc.testing.protobuf.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getUnaryRpcMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Simple client-to-server streaming RPC.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.protobuf.SimpleRequest, io.grpc.testing.protobuf.SimpleResponse>
+        clientStreamingRpc() {
+      return io.grpc.stub.ClientCalls.blockingClientStreamingCall(
+          getChannel(), getClientStreamingRpcMethod(), getCallOptions());
+    }
+
+    /**
+     * <pre>
+     * Simple server-to-client streaming RPC.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, io.grpc.testing.protobuf.SimpleResponse>
+        serverStreamingRpc(io.grpc.testing.protobuf.SimpleRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getServerStreamingRpcMethod(), getCallOptions(), request);
+    }
+
+    /**
+     * <pre>
+     * Simple bidirectional streaming RPC.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.grpc.testing.protobuf.SimpleRequest, io.grpc.testing.protobuf.SimpleResponse>
+        bidiStreamingRpc() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getBidiStreamingRpcMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service SimpleService.
+   * <pre>
+   * A simple service for test.
+   * </pre>
+   */
   public static final class SimpleServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<SimpleServiceBlockingStub> {
     private SimpleServiceBlockingStub(

xds/src/generated/thirdparty/grpc/com/github/xds/service/orca/v3/OpenRcaServiceGrpc.java

@@ -70,6 +70,21 @@ public final class OpenRcaServiceGrpc {
     return OpenRcaServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static OpenRcaServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<OpenRcaServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<OpenRcaServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public OpenRcaServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new OpenRcaServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return OpenRcaServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -191,6 +206,42 @@ public final class OpenRcaServiceGrpc {
    * a new call to change backend reporting frequency.
    * </pre>
    */
+  public static final class OpenRcaServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<OpenRcaServiceBlockingV2Stub> {
+    private OpenRcaServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected OpenRcaServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new OpenRcaServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<?, com.github.xds.data.orca.v3.OrcaLoadReport>
+        streamCoreMetrics(com.github.xds.service.orca.v3.OrcaLoadReportRequest request) {
+      return io.grpc.stub.ClientCalls.blockingV2ServerStreamingCall(
+          getChannel(), getStreamCoreMetricsMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service OpenRcaService.
+   * <pre>
+   * Out-of-band (OOB) load reporting service for the additional load reporting
+   * agent that does not sit in the request path. Reports are periodically sampled
+   * with sufficient frequency to provide temporal association with requests.
+   * OOB reporting compensates the limitation of in-band reporting in revealing
+   * costs for backends that do not provide a steady stream of telemetry such as
+   * long running stream operations and zero QPS services. This is a server
+   * streaming service, client needs to terminate current RPC and initiate
+   * a new call to change backend reporting frequency.
+   * </pre>
+   */
   public static final class OpenRcaServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<OpenRcaServiceBlockingStub> {
     private OpenRcaServiceBlockingStub(

xds/src/generated/thirdparty/grpc/io/envoyproxy/envoy/service/discovery/v3/AggregatedDiscoveryServiceGrpc.java

@@ -99,6 +99,21 @@ public final class AggregatedDiscoveryServiceGrpc {
     return AggregatedDiscoveryServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static AggregatedDiscoveryServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<AggregatedDiscoveryServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<AggregatedDiscoveryServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public AggregatedDiscoveryServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new AggregatedDiscoveryServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return AggregatedDiscoveryServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -233,6 +248,52 @@ public final class AggregatedDiscoveryServiceGrpc {
    * the multiplexed singleton APIs at the Envoy instance and management server.
    * </pre>
    */
+  public static final class AggregatedDiscoveryServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<AggregatedDiscoveryServiceBlockingV2Stub> {
+    private AggregatedDiscoveryServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected AggregatedDiscoveryServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new AggregatedDiscoveryServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * This is a gRPC-only API.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.envoyproxy.envoy.service.discovery.v3.DiscoveryRequest, io.envoyproxy.envoy.service.discovery.v3.DiscoveryResponse>
+        streamAggregatedResources() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getStreamAggregatedResourcesMethod(), getCallOptions());
+    }
+
+    /**
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.envoyproxy.envoy.service.discovery.v3.DeltaDiscoveryRequest, io.envoyproxy.envoy.service.discovery.v3.DeltaDiscoveryResponse>
+        deltaAggregatedResources() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getDeltaAggregatedResourcesMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service AggregatedDiscoveryService.
+   * <pre>
+   * See https://github.com/envoyproxy/envoy-api#apis for a description of the role of
+   * ADS and how it is intended to be used by a management server. ADS requests
+   * have the same structure as their singleton xDS counterparts, but can
+   * multiplex many resource types on a single stream. The type_url in the
+   * DiscoveryRequest/DiscoveryResponse provides sufficient information to recover
+   * the multiplexed singleton APIs at the Envoy instance and management server.
+   * </pre>
+   */
   public static final class AggregatedDiscoveryServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<AggregatedDiscoveryServiceBlockingStub> {
     private AggregatedDiscoveryServiceBlockingStub(

xds/src/generated/thirdparty/grpc/io/envoyproxy/envoy/service/load_stats/v3/LoadReportingServiceGrpc.java

@@ -60,6 +60,21 @@ public final class LoadReportingServiceGrpc {
     return LoadReportingServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static LoadReportingServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<LoadReportingServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<LoadReportingServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public LoadReportingServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new LoadReportingServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return LoadReportingServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -199,6 +214,61 @@ public final class LoadReportingServiceGrpc {
   /**
    * A stub to allow clients to do synchronous rpc calls to service LoadReportingService.
    */
+  public static final class LoadReportingServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<LoadReportingServiceBlockingV2Stub> {
+    private LoadReportingServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected LoadReportingServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new LoadReportingServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Advanced API to allow for multi-dimensional load balancing by remote
+     * server. For receiving LB assignments, the steps are:
+     * 1, The management server is configured with per cluster/zone/load metric
+     *    capacity configuration. The capacity configuration definition is
+     *    outside of the scope of this document.
+     * 2. Envoy issues a standard {Stream,Fetch}Endpoints request for the clusters
+     *    to balance.
+     * Independently, Envoy will initiate a StreamLoadStats bidi stream with a
+     * management server:
+     * 1. Once a connection establishes, the management server publishes a
+     *    LoadStatsResponse for all clusters it is interested in learning load
+     *    stats about.
+     * 2. For each cluster, Envoy load balances incoming traffic to upstream hosts
+     *    based on per-zone weights and/or per-instance weights (if specified)
+     *    based on intra-zone LbPolicy. This information comes from the above
+     *    {Stream,Fetch}Endpoints.
+     * 3. When upstream hosts reply, they optionally add header &lt;define header
+     *    name&gt; with ASCII representation of EndpointLoadMetricStats.
+     * 4. Envoy aggregates load reports over the period of time given to it in
+     *    LoadStatsResponse.load_reporting_interval. This includes aggregation
+     *    stats Envoy maintains by itself (total_requests, rpc_errors etc.) as
+     *    well as load metrics from upstream hosts.
+     * 5. When the timer of load_reporting_interval expires, Envoy sends new
+     *    LoadStatsRequest filled with load reports for each cluster.
+     * 6. The management server uses the load reports from all reported Envoys
+     *    from around the world, computes global assignment and prepares traffic
+     *    assignment destined for each zone Envoys are located in. Goto 2.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.envoyproxy.envoy.service.load_stats.v3.LoadStatsRequest, io.envoyproxy.envoy.service.load_stats.v3.LoadStatsResponse>
+        streamLoadStats() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getStreamLoadStatsMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service LoadReportingService.
+   */
   public static final class LoadReportingServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<LoadReportingServiceBlockingStub> {
     private LoadReportingServiceBlockingStub(

xds/src/generated/thirdparty/grpc/io/envoyproxy/envoy/service/rate_limit_quota/v3/RateLimitQuotaServiceGrpc.java

@@ -63,6 +63,21 @@ public final class RateLimitQuotaServiceGrpc {
     return RateLimitQuotaServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static RateLimitQuotaServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<RateLimitQuotaServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<RateLimitQuotaServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public RateLimitQuotaServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new RateLimitQuotaServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return RateLimitQuotaServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -164,6 +179,39 @@ public final class RateLimitQuotaServiceGrpc {
    * Defines the Rate Limit Quota Service (RLQS).
    * </pre>
    */
+  public static final class RateLimitQuotaServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<RateLimitQuotaServiceBlockingV2Stub> {
+    private RateLimitQuotaServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected RateLimitQuotaServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new RateLimitQuotaServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     * <pre>
+     * Main communication channel: the data plane sends usage reports to the RLQS server,
+     * and the server asynchronously responding with the assignments.
+     * </pre>
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.envoyproxy.envoy.service.rate_limit_quota.v3.RateLimitQuotaUsageReports, io.envoyproxy.envoy.service.rate_limit_quota.v3.RateLimitQuotaResponse>
+        streamRateLimitQuotas() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getStreamRateLimitQuotasMethod(), getCallOptions());
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service RateLimitQuotaService.
+   * <pre>
+   * Defines the Rate Limit Quota Service (RLQS).
+   * </pre>
+   */
   public static final class RateLimitQuotaServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<RateLimitQuotaServiceBlockingStub> {
     private RateLimitQuotaServiceBlockingStub(

xds/src/generated/thirdparty/grpc/io/envoyproxy/envoy/service/status/v3/ClientStatusDiscoveryServiceGrpc.java

@@ -96,6 +96,21 @@ public final class ClientStatusDiscoveryServiceGrpc {
     return ClientStatusDiscoveryServiceStub.newStub(factory, channel);
   }
 
+  /**
+   * Creates a new blocking-style stub that supports all types of calls on the service
+   */
+  public static ClientStatusDiscoveryServiceBlockingV2Stub newBlockingV2Stub(
+      io.grpc.Channel channel) {
+    io.grpc.stub.AbstractStub.StubFactory<ClientStatusDiscoveryServiceBlockingV2Stub> factory =
+      new io.grpc.stub.AbstractStub.StubFactory<ClientStatusDiscoveryServiceBlockingV2Stub>() {
+        @java.lang.Override
+        public ClientStatusDiscoveryServiceBlockingV2Stub newStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+          return new ClientStatusDiscoveryServiceBlockingV2Stub(channel, callOptions);
+        }
+      };
+    return ClientStatusDiscoveryServiceBlockingV2Stub.newStub(factory, channel);
+  }
+
   /**
    * Creates a new blocking-style stub that supports unary and streaming output calls on the service
    */
@@ -212,6 +227,44 @@ public final class ClientStatusDiscoveryServiceGrpc {
    * also be used to get the current xDS states directly from the client.
    * </pre>
    */
+  public static final class ClientStatusDiscoveryServiceBlockingV2Stub
+      extends io.grpc.stub.AbstractBlockingStub<ClientStatusDiscoveryServiceBlockingV2Stub> {
+    private ClientStatusDiscoveryServiceBlockingV2Stub(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      super(channel, callOptions);
+    }
+
+    @java.lang.Override
+    protected ClientStatusDiscoveryServiceBlockingV2Stub build(
+        io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
+      return new ClientStatusDiscoveryServiceBlockingV2Stub(channel, callOptions);
+    }
+
+    /**
+     */
+    @io.grpc.ExperimentalApi("https://github.com/grpc/grpc-java/issues/10918")
+    public io.grpc.stub.BlockingClientCall<io.envoyproxy.envoy.service.status.v3.ClientStatusRequest, io.envoyproxy.envoy.service.status.v3.ClientStatusResponse>
+        streamClientStatus() {
+      return io.grpc.stub.ClientCalls.blockingBidiStreamingCall(
+          getChannel(), getStreamClientStatusMethod(), getCallOptions());
+    }
+
+    /**
+     */
+    public io.envoyproxy.envoy.service.status.v3.ClientStatusResponse fetchClientStatus(io.envoyproxy.envoy.service.status.v3.ClientStatusRequest request) {
+      return io.grpc.stub.ClientCalls.blockingUnaryCall(
+          getChannel(), getFetchClientStatusMethod(), getCallOptions(), request);
+    }
+  }
+
+  /**
+   * A stub to allow clients to do llimited synchronous rpc calls to service ClientStatusDiscoveryService.
+   * <pre>
+   * CSDS is Client Status Discovery Service. It can be used to get the status of
+   * an xDS-compliant client from the management server's point of view. It can
+   * also be used to get the current xDS states directly from the client.
+   * </pre>
+   */
   public static final class ClientStatusDiscoveryServiceBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<ClientStatusDiscoveryServiceBlockingStub> {
     private ClientStatusDiscoveryServiceBlockingStub(