Examples with Channel io.grpc.Channel used on opensource projects

Example 46 with Channel

use of io.grpc.Channel in project beam by apache.

the class GrpcContextHeaderAccessorProviderTest method testWorkerIdOnConnect.

@SuppressWarnings("unchecked")
@Test
public void testWorkerIdOnConnect() throws Exception {
    final String worker1 = "worker1";
    CompletableFuture<String> workerId = new CompletableFuture<>();
    Consumer<StreamObserver<Elements>> consumer = elementsStreamObserver -> {
        workerId.complete(GrpcContextHeaderAccessorProvider.getHeaderAccessor().getSdkWorkerId());
        elementsStreamObserver.onCompleted();
    };
    TestDataService testService = new TestDataService(Mockito.mock(StreamObserver.class), consumer);
    ApiServiceDescriptor serviceDescriptor = ApiServiceDescriptor.newBuilder().setUrl("testServer").build();
    cleanupRule.register(InProcessServerFactory.create().create(ImmutableList.of(testService), serviceDescriptor));
    final Metadata.Key<String> workerIdKey = Metadata.Key.of("worker_id", Metadata.ASCII_STRING_MARSHALLER);
    Channel channel = cleanupRule.register(InProcessChannelBuilder.forName(serviceDescriptor.getUrl()).intercept(new ClientInterceptor() {

        @Override
        public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) {
            ClientCall<ReqT, RespT> call = next.newCall(method, callOptions);
            return new SimpleForwardingClientCall<ReqT, RespT>(call) {

                @Override
                public void start(ClientCall.Listener<RespT> responseListener, Metadata headers) {
                    headers.put(workerIdKey, worker1);
                    super.start(responseListener, headers);
                }
            };
        }
    }).build());
    BeamFnDataGrpc.BeamFnDataStub stub = BeamFnDataGrpc.newStub(channel);
    stub.data(Mockito.mock(StreamObserver.class)).onCompleted();
    Assert.assertEquals(worker1, workerId.get());
}

Example 47 with Channel

use of io.grpc.Channel in project grpc-java by grpc.

the class ManagedChannelImplTest method subchannelChannel_normalUsage.

@Test
public void subchannelChannel_normalUsage() {
    createChannel();
    Subchannel subchannel = createSubchannelSafely(helper, addressGroup, Attributes.EMPTY, subchannelStateListener);
    verify(balancerRpcExecutorPool, never()).getObject();
    Channel sChannel = subchannel.asChannel();
    verify(balancerRpcExecutorPool).getObject();
    Metadata headers = new Metadata();
    CallOptions callOptions = CallOptions.DEFAULT.withDeadlineAfter(5, TimeUnit.SECONDS);
    // Subchannel must be READY when creating the RPC.
    requestConnectionSafely(helper, subchannel);
    verify(mockTransportFactory).newClientTransport(any(SocketAddress.class), any(ClientTransportOptions.class), any(ChannelLogger.class));
    MockClientTransportInfo transportInfo = transports.poll();
    ConnectionClientTransport mockTransport = transportInfo.transport;
    ManagedClientTransport.Listener transportListener = transportInfo.listener;
    transportListener.transportReady();
    ClientCall<String, Integer> call = sChannel.newCall(method, callOptions);
    call.start(mockCallListener, headers);
    verify(mockTransport).newStream(same(method), same(headers), callOptionsCaptor.capture(), ArgumentMatchers.<ClientStreamTracer[]>any());
    CallOptions capturedCallOption = callOptionsCaptor.getValue();
    assertThat(capturedCallOption.getDeadline()).isSameInstanceAs(callOptions.getDeadline());
    assertThat(capturedCallOption.getOption(GrpcUtil.CALL_OPTIONS_RPC_OWNED_BY_BALANCER)).isTrue();
}

Example 48 with Channel

use of io.grpc.Channel in project grpc-java by grpc.

the class ManagedChannelImplTest method interceptor.

@Test
public void interceptor() throws Exception {
    final AtomicLong atomic = new AtomicLong();
    ClientInterceptor interceptor = new ClientInterceptor() {

        @Override
        public <RequestT, ResponseT> ClientCall<RequestT, ResponseT> interceptCall(MethodDescriptor<RequestT, ResponseT> method, CallOptions callOptions, Channel next) {
            atomic.set(1);
            return next.newCall(method, callOptions);
        }
    };
    createChannel(interceptor);
    assertNotNull(channel.newCall(method, CallOptions.DEFAULT));
    assertEquals(1, atomic.get());
}

Example 49 with Channel

use of io.grpc.Channel in project grpc-java by grpc.

the class HandshakerServiceChannelTest method sharedChannel_authority.

@Test
public void sharedChannel_authority() {
    resource = HandshakerServiceChannel.SHARED_HANDSHAKER_CHANNEL;
    Channel channel = resource.create();
    try {
        assertThat(channel.authority()).isEqualTo("metadata.google.internal.:8080");
    } finally {
        resource.close(channel);
    }
}

Example 50 with Channel

use of io.grpc.Channel in project grpc-java by grpc.

the class ConfigSelectingClientCallTest method configSelectorInterceptsCall.

@Test
public void configSelectorInterceptsCall() {
    Map<String, ?> rawMethodConfig = ImmutableMap.of("retryPolicy", ImmutableMap.of("maxAttempts", 3.0D, "initialBackoff", "1s", "maxBackoff", "10s", "backoffMultiplier", 1.5D, "retryableStatusCodes", ImmutableList.of("UNAVAILABLE")));
    final MethodInfo methodInfo = new MethodInfo(rawMethodConfig, true, 4, 4);
    final Metadata.Key<String> metadataKey = Metadata.Key.of("test", Metadata.ASCII_STRING_MARSHALLER);
    final CallOptions.Key<String> callOptionsKey = CallOptions.Key.create("test");
    InternalConfigSelector configSelector = new InternalConfigSelector() {

        @Override
        public Result selectConfig(final PickSubchannelArgs args) {
            ManagedChannelServiceConfig config = new ManagedChannelServiceConfig(methodInfo, ImmutableMap.<String, MethodInfo>of(), ImmutableMap.<String, MethodInfo>of(), null, null, null);
            return Result.newBuilder().setConfig(config).setInterceptor(// An interceptor that mutates CallOptions based on headers value.
            new ClientInterceptor() {

                String value = args.getHeaders().get(metadataKey);

                @Override
                public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) {
                    callOptions = callOptions.withOption(callOptionsKey, value);
                    return next.newCall(method, callOptions);
                }
            }).build();
        }
    };
    ClientCall<Void, Void> configSelectingClientCall = new ConfigSelectingClientCall<>(configSelector, channel, MoreExecutors.directExecutor(), method, CallOptions.DEFAULT.withAuthority("bar.authority"));
    Metadata metadata = new Metadata();
    metadata.put(metadataKey, "fooValue");
    configSelectingClientCall.start(callListener, metadata);
    assertThat(call.callOptions.getAuthority()).isEqualTo("bar.authority");
    assertThat(call.callOptions.getOption(MethodInfo.KEY)).isEqualTo(methodInfo);
    assertThat(call.callOptions.getOption(callOptionsKey)).isEqualTo("fooValue");
}