Java ClientCallStreamObserver.onNext方法代码示例

import io.grpc.stub.ClientCallStreamObserver; //导入方法依赖的package包/类
@Test
public void flowControl() throws Exception {
  FlowControlClientResponseObserver clientResponseObserver =
      new FlowControlClientResponseObserver();
  ClientCallStreamObserver<ServerReflectionRequest> requestObserver =
      (ClientCallStreamObserver<ServerReflectionRequest>)
          stub.serverReflectionInfo(clientResponseObserver);

  // ClientCalls.startCall() calls request(1) initially, so we should get an immediate response.
  requestObserver.onNext(flowControlRequest);
  assertEquals(1, clientResponseObserver.getResponses().size());
  assertEquals(flowControlGoldenResponse, clientResponseObserver.getResponses().get(0));

  // Verify we don't receive an additional response until we request it.
  requestObserver.onNext(flowControlRequest);
  assertEquals(1, clientResponseObserver.getResponses().size());

  requestObserver.request(1);
  assertEquals(2, clientResponseObserver.getResponses().size());
  assertEquals(flowControlGoldenResponse, clientResponseObserver.getResponses().get(1));

  requestObserver.onCompleted();
  assertTrue(clientResponseObserver.onCompleteCalled());
}
 

import io.grpc.stub.ClientCallStreamObserver; //导入方法依赖的package包/类
@Test
public void flowControlOnCompleteWithPendingRequest() throws Exception {
  FlowControlClientResponseObserver clientResponseObserver =
      new FlowControlClientResponseObserver();
  ClientCallStreamObserver<ServerReflectionRequest> requestObserver =
      (ClientCallStreamObserver<ServerReflectionRequest>)
          stub.serverReflectionInfo(clientResponseObserver);

  // ClientCalls.startCall() calls request(1) initially, so make additional request.
  requestObserver.onNext(flowControlRequest);
  requestObserver.onNext(flowControlRequest);
  requestObserver.onCompleted();
  assertEquals(1, clientResponseObserver.getResponses().size());
  assertFalse(clientResponseObserver.onCompleteCalled());

  requestObserver.request(1);
  assertTrue(clientResponseObserver.onCompleteCalled());
  assertEquals(2, clientResponseObserver.getResponses().size());
  assertEquals(flowControlGoldenResponse, clientResponseObserver.getResponses().get(1));
}
 

import io.grpc.stub.ClientCallStreamObserver; //导入方法依赖的package包/类
/**
 * Tests client per-message compression for streaming calls. The Java API does not support
 * inspecting a message's compression level, so this is primarily intended to run against a gRPC
 * C++ server.
 */
public void clientCompressedStreaming() throws Exception {
  final StreamingInputCallRequest expectCompressedRequest =
      StreamingInputCallRequest.newBuilder()
          .setExpectCompressed(BoolValue.newBuilder().setValue(true))
          .setPayload(Payload.newBuilder().setBody(ByteString.copyFrom(new byte[27182])))
          .build();
  final StreamingInputCallRequest expectUncompressedRequest =
      StreamingInputCallRequest.newBuilder()
          .setExpectCompressed(BoolValue.newBuilder().setValue(false))
          .setPayload(Payload.newBuilder().setBody(ByteString.copyFrom(new byte[45904])))
          .build();
  final StreamingInputCallResponse goldenResponse =
      StreamingInputCallResponse.newBuilder().setAggregatedPayloadSize(73086).build();

  StreamRecorder<StreamingInputCallResponse> responseObserver = StreamRecorder.create();
  StreamObserver<StreamingInputCallRequest> requestObserver =
      asyncStub.streamingInputCall(responseObserver);

  // Send a non-compressed message with expectCompress=true. Servers supporting this test case
  // should return INVALID_ARGUMENT.
  requestObserver.onNext(expectCompressedRequest);
  responseObserver.awaitCompletion(operationTimeoutMillis(), TimeUnit.MILLISECONDS);
  Throwable e = responseObserver.getError();
  assertNotNull("expected INVALID_ARGUMENT", e);
  assertEquals(Status.INVALID_ARGUMENT.getCode(), Status.fromThrowable(e).getCode());

  // Start a new stream
  responseObserver = StreamRecorder.create();
  @SuppressWarnings("unchecked")
  ClientCallStreamObserver<StreamingInputCallRequest> clientCallStreamObserver =
      (ClientCallStreamObserver)
          asyncStub.withCompression("gzip").streamingInputCall(responseObserver);
  clientCallStreamObserver.setMessageCompression(true);
  clientCallStreamObserver.onNext(expectCompressedRequest);
  clientCallStreamObserver.setMessageCompression(false);
  clientCallStreamObserver.onNext(expectUncompressedRequest);
  clientCallStreamObserver.onCompleted();
  responseObserver.awaitCompletion();
  assertSuccess(responseObserver);
  assertEquals(goldenResponse, responseObserver.firstValue().get());
}