Examples of com.google.protobuf.RpcController

com.google.protobuf.RpcController

An {@code RpcController} mediates a single method call. The primarypurpose of the controller is to provide a way to manipulate settings specific to the RPC implementation and to find out about RPC-level errors.
Starting with version 2.3.0, RPC implementations should not try to build on this, but should instead provide code generator plugins which generate code specific to the particular RPC implementation. This way the generated code can be more appropriate for the implementation in use and can avoid unnecessary layers of indirection.
The methods provided by the {@code RpcController} interface are intendedto be a "least common denominator" set of features which we expect all implementations to support. Specific implementations may provide more advanced features (e.g. deadline propagation). @author kenton@google.com Kenton Varda

        TestProtos.EchoRequestProto.newBuilder().setMessage("hello").build();
    final Map<byte[], String> results = Collections.synchronizedMap(
        new TreeMap<byte[], String>(Bytes.BYTES_COMPARATOR));
    try {
      // scan: for all regions
      final RpcController controller = new ServerRpcController();
      table.coprocessorService(TestRpcServiceProtos.TestProtobufRpcProto.class,
          ROWS[0], ROWS[ROWS.length - 1],
          new Batch.Call<TestRpcServiceProtos.TestProtobufRpcProto, TestProtos.EchoResponseProto>() {
            public TestProtos.EchoResponseProto call(TestRpcServiceProtos.TestProtobufRpcProto instance)
                throws IOException {

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    final TestProtos.EchoRequestProto request =
        TestProtos.EchoRequestProto.newBuilder().setMessage("hello").build();
    try {
      // scan: for all regions
      final RpcController controller = new ServerRpcController();
      // test that null results are supported
      Map<byte[], String> results = table.coprocessorService(TestRpcServiceProtos.TestProtobufRpcProto.class,
          ROWS[0], ROWS[ROWS.length - 1],
          new Batch.Call<TestRpcServiceProtos.TestProtobufRpcProto, String>() {
            public String call(TestRpcServiceProtos.TestProtobufRpcProto instance)

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        } catch (Throwable t) {
          throw new RemoteCallException(request.getId(), methodDescriptor, t);
        }
      }
      Message returnValue;
      RpcController controller = new NettyRpcController();


      try {
        returnValue = service.callBlockingMethod(methodDescriptor,
            controller, paramProto);
      } catch (Throwable t) {
        throw new RemoteCallException(request.getId(), methodDescriptor, t);
      }


      RpcResponse.Builder builder =
          RpcResponse.newBuilder().setId(request.getId());


      if (returnValue != null) {
        builder.setResponseMessage(returnValue.toByteString());
      }


      if (controller.failed()) {
        builder.setErrorMessage(controller.errorText());
      }
      e.getChannel().write(builder.build());
    }

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          throw new RemoteCallException(request.getId(), methodDescriptor, t);
        }
      }


      final Channel channel = e.getChannel();
      final RpcController controller = new NettyRpcController();


      RpcCallback<Message> callback =
          !request.hasId() ? null : new RpcCallback<Message>() {


        public void run(Message returnValue) {


          RpcResponse.Builder builder = RpcResponse.newBuilder()
              .setId(request.getId());


          if (returnValue != null) {
            builder.setResponseMessage(returnValue.toByteString());
          }


          if (controller.failed()) {
            builder.setErrorMessage(controller.errorText());
          }


          channel.write(builder.build());
        }
      };

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    // Create a client-side stub for talking to the server.
    WaveClientRpc.ProtocolWaveClientRpc.Stub stub =
        WaveClientRpc.ProtocolWaveClientRpc.newStub(client);


    // Create a controller, set up request, wait for responses.
    RpcController controller = client.newRpcController();
    ProtocolOpenRequest request =
        ProtocolOpenRequest.newBuilder().setParticipantId(USER).setWaveId(WAVE).build();
    stub.open(controller, request, new RpcCallback<ProtocolWaveletUpdate>() {
      @Override
      public void run(ProtocolWaveletUpdate response) {

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    // Create a client-side stub for talking to the server.
    WaveClientRpc.ProtocolWaveClientRpc.Stub stub =
        WaveClientRpc.ProtocolWaveClientRpc.newStub(client);


    // Create a controller, set up request, wait for responses.
    RpcController controller = client.newRpcController();
    ProtocolOpenRequest request =
        ProtocolOpenRequest.newBuilder().setParticipantId("").setWaveId("").build();
    stub.open(controller, request, new RpcCallback<ProtocolWaveletUpdate>() {
      @Override
      public void run(ProtocolWaveletUpdate response) {
        responses.add(response);
        responseLatch.countDown();
      }
    });


    // Wait for a response, and assert that is a complete failure. :-)
    responseLatch.await(TIMEOUT_SECONDS, TimeUnit.SECONDS);
    assertEquals(Arrays.asList((ProtocolWaveletUpdate) null), responses);
    assertTrue(controller.failed());
    assertEquals(ERROR_TEXT, controller.errorText());
  }

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    // Create a client-side stub for talking to the server.
    WaveClientRpc.ProtocolWaveClientRpc.Stub stub =
        WaveClientRpc.ProtocolWaveClientRpc.newStub(client);


    // Create a controller, set up request, wait for responses.
    RpcController controller = client.newRpcController();
    ProtocolOpenRequest request =
        ProtocolOpenRequest.newBuilder().setParticipantId("").setWaveId("").build();
    stub.open(controller, request, new RpcCallback<ProtocolWaveletUpdate>() {
      @Override
      public void run(ProtocolWaveletUpdate response) {
        if (response != null) {
          responseLatch.countDown();
        } else {
          finishedLatch.countDown();
        }
      }
    });


    // Wait for all pending responses.
    responseLatch.await(TIMEOUT_SECONDS, TimeUnit.SECONDS);
    assertEquals(0, responseLatch.getCount());
    assertEquals(1, finishedLatch.getCount());


    // Cancel the RPC and wait for it to finish.
    controller.startCancel();
    finishedLatch.await(TIMEOUT_SECONDS, TimeUnit.SECONDS);
    assertEquals(0, finishedLatch.getCount());
    assertFalse(controller.failed());
  }

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        } catch (Throwable t) {
          throw new RemoteCallException(request.getId(), methodDescriptor, t);
        }
      }
      Message returnValue;
      RpcController controller = new NettyRpcController();


      try {
        returnValue = service.callBlockingMethod(methodDescriptor,
            controller, paramProto);
      } catch (Throwable t) {
        throw new RemoteCallException(request.getId(), methodDescriptor, t);
      }


      RpcResponse.Builder builder =
          RpcResponse.newBuilder().setId(request.getId());


      if (returnValue != null) {
        builder.setResponseMessage(returnValue.toByteString());
      }


      if (controller.failed()) {
        builder.setErrorMessage(controller.errorText());
      }
      e.getChannel().write(builder.build());
    }

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          throw new RemoteCallException(request.getId(), methodDescriptor, t);
        }
      }


      final Channel channel = e.getChannel();
      final RpcController controller = new NettyRpcController();


      RpcCallback<Message> callback =
          !request.hasId() ? null : new RpcCallback<Message>() {


        public void run(Message returnValue) {


          RpcResponse.Builder builder = RpcResponse.newBuilder()
              .setId(request.getId());


          if (returnValue != null) {
            builder.setResponseMessage(returnValue.toByteString());
          }


          if (controller.failed()) {
            builder.setErrorMessage(controller.errorText());
          }


          channel.write(builder.build());
        }
      };

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        TestProtos.EchoRequestProto.newBuilder().setMessage("hello").build();
    final Map<byte[], String> results = Collections.synchronizedMap(
        new TreeMap<byte[], String>(Bytes.BYTES_COMPARATOR));
    try {
      // scan: for all regions
      final RpcController controller = new ServerRpcController();
      table.coprocessorService(TestRpcServiceProtos.TestProtobufRpcProto.class,
          ROWS[0], ROWS[ROWS.length - 1],
          new Batch.Call<TestRpcServiceProtos.TestProtobufRpcProto, TestProtos.EchoResponseProto>() {
            public TestProtos.EchoResponseProto call(TestRpcServiceProtos.TestProtobufRpcProto instance)
                throws IOException {

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