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

Example 31 with Channel

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

the class ManagedChannelImplTest method subchannelChannel_failWaitForReady.

@Test
public void subchannelChannel_failWaitForReady() {
    createChannel();
    Subchannel subchannel = createSubchannelSafely(helper, addressGroup, Attributes.EMPTY, subchannelStateListener);
    Channel sChannel = subchannel.asChannel();
    Metadata headers = new Metadata();
    // 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();
    assertEquals(0, balancerRpcExecutor.numPendingTasks());
    // Wait-for-ready RPC is not allowed
    ClientCall<String, Integer> call = sChannel.newCall(method, CallOptions.DEFAULT.withWaitForReady());
    call.start(mockCallListener, headers);
    verify(mockTransport, never()).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
    verifyNoInteractions(mockCallListener);
    assertEquals(1, balancerRpcExecutor.runDueTasks());
    verify(mockCallListener).onClose(same(SubchannelChannel.WAIT_FOR_READY_ERROR), any(Metadata.class));
}

Example 32 with Channel

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

the class ManagedChannelImplTest method binaryLogInstalled.

@Test
public void binaryLogInstalled() throws Exception {
    final SettableFuture<Boolean> intercepted = SettableFuture.create();
    channelBuilder.binlog = new BinaryLog() {

        @Override
        public void close() throws IOException {
        // noop
        }

        @Override
        public <ReqT, RespT> ServerMethodDefinition<?, ?> wrapMethodDefinition(ServerMethodDefinition<ReqT, RespT> oMethodDef) {
            return oMethodDef;
        }

        @Override
        public Channel wrapChannel(Channel channel) {
            return ClientInterceptors.intercept(channel, new ClientInterceptor() {

                @Override
                public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) {
                    intercepted.set(true);
                    return next.newCall(method, callOptions);
                }
            });
        }
    };
    createChannel();
    ClientCall<String, Integer> call = channel.newCall(method, CallOptions.DEFAULT);
    call.start(mockCallListener, new Metadata());
    assertTrue(intercepted.get());
}

Example 33 with Channel

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

the class FaultFilter method buildClientInterceptor.

@Nullable
@Override
public ClientInterceptor buildClientInterceptor(FilterConfig config, @Nullable FilterConfig overrideConfig, PickSubchannelArgs args, final ScheduledExecutorService scheduler) {
    checkNotNull(config, "config");
    if (overrideConfig != null) {
        config = overrideConfig;
    }
    FaultConfig faultConfig = (FaultConfig) config;
    Long delayNanos = null;
    Status abortStatus = null;
    if (faultConfig.maxActiveFaults() == null || activeFaultCounter.get() < faultConfig.maxActiveFaults()) {
        Metadata headers = args.getHeaders();
        if (faultConfig.faultDelay() != null) {
            delayNanos = determineFaultDelayNanos(faultConfig.faultDelay(), headers);
        }
        if (faultConfig.faultAbort() != null) {
            abortStatus = determineFaultAbortStatus(faultConfig.faultAbort(), headers);
        }
    }
    if (delayNanos == null && abortStatus == null) {
        return null;
    }
    final Long finalDelayNanos = delayNanos;
    final Status finalAbortStatus = getAbortStatusWithDescription(abortStatus);
    final class FaultInjectionInterceptor implements ClientInterceptor {

        @Override
        public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(final MethodDescriptor<ReqT, RespT> method, final CallOptions callOptions, final Channel next) {
            Executor callExecutor = callOptions.getExecutor();
            if (callExecutor == null) {
                // This should never happen in practice because
                // ManagedChannelImpl.ConfigSelectingClientCall always provides CallOptions with
                // a callExecutor.
                // TODO(https://github.com/grpc/grpc-java/issues/7868)
                callExecutor = MoreExecutors.directExecutor();
            }
            if (finalDelayNanos != null) {
                Supplier<? extends ClientCall<ReqT, RespT>> callSupplier;
                if (finalAbortStatus != null) {
                    callSupplier = Suppliers.ofInstance(new FailingClientCall<ReqT, RespT>(finalAbortStatus, callExecutor));
                } else {
                    callSupplier = new Supplier<ClientCall<ReqT, RespT>>() {

                        @Override
                        public ClientCall<ReqT, RespT> get() {
                            return next.newCall(method, callOptions);
                        }
                    };
                }
                final DelayInjectedCall<ReqT, RespT> delayInjectedCall = new DelayInjectedCall<>(finalDelayNanos, callExecutor, scheduler, callOptions.getDeadline(), callSupplier);
                final class DeadlineInsightForwardingCall extends ForwardingClientCall<ReqT, RespT> {

                    @Override
                    protected ClientCall<ReqT, RespT> delegate() {
                        return delayInjectedCall;
                    }

                    @Override
                    public void start(Listener<RespT> listener, Metadata headers) {
                        Listener<RespT> finalListener = new SimpleForwardingClientCallListener<RespT>(listener) {

                            @Override
                            public void onClose(Status status, Metadata trailers) {
                                if (status.getCode().equals(Code.DEADLINE_EXCEEDED)) {
                                    // TODO(zdapeng:) check effective deadline locally, and
                                    // do the following only if the local deadline is exceeded.
                                    // (If the server sends DEADLINE_EXCEEDED for its own deadline, then the
                                    // injected delay does not contribute to the error, because the request is
                                    // only sent out after the delay. There could be a race between local and
                                    // remote, but it is rather rare.)
                                    String description = String.format("Deadline exceeded after up to %d ns of fault-injected delay", finalDelayNanos);
                                    if (status.getDescription() != null) {
                                        description = description + ": " + status.getDescription();
                                    }
                                    status = Status.DEADLINE_EXCEEDED.withDescription(description).withCause(status.getCause());
                                    // Replace trailers to prevent mixing sources of status and trailers.
                                    trailers = new Metadata();
                                }
                                delegate().onClose(status, trailers);
                            }
                        };
                        delegate().start(finalListener, headers);
                    }
                }
                return new DeadlineInsightForwardingCall();
            } else {
                return new FailingClientCall<>(finalAbortStatus, callExecutor);
            }
        }
    }
    return new FaultInjectionInterceptor();
}

Example 34 with Channel

use of io.grpc.Channel in project jetcd by coreos.

the class ClientConnectionManagerTest method testHeaders.

@Test
public void testHeaders() throws InterruptedException, ExecutionException {
    final CountDownLatch latch = new CountDownLatch(1);
    final ClientBuilder builder = TestUtil.client(cluster).header("MyHeader1", "MyHeaderVal1").header("MyHeader2", "MyHeaderVal2").interceptor(new ClientInterceptor() {

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

                @Override
                public void start(Listener<RespT> responseListener, Metadata headers) {
                    super.start(responseListener, headers);
                    assertThat(headers.get(Metadata.Key.of("MyHeader1", Metadata.ASCII_STRING_MARSHALLER))).isEqualTo("MyHeaderVal1");
                    assertThat(headers.get(Metadata.Key.of("MyHeader2", Metadata.ASCII_STRING_MARSHALLER))).isEqualTo("MyHeaderVal2");
                    latch.countDown();
                }
            };
        }
    });
    try (Client client = builder.build()) {
        CompletableFuture<PutResponse> future = client.getKVClient().put(bytesOf("sample_key"), bytesOf("sample_key"));
        latch.await(1, TimeUnit.MINUTES);
        future.get();
    }
}

Example 35 with Channel

use of io.grpc.Channel in project dubbo by alibaba.

the class GrpcProtocol method protocolBindingRefer.

@Override
protected <T> Invoker<T> protocolBindingRefer(final Class<T> type, final URL url) throws RpcException {
    Class<?> enclosingClass = type.getEnclosingClass();
    if (enclosingClass == null) {
        throw new IllegalArgumentException(type.getName() + " must be declared inside protobuf generated classes, " + "should be something like ServiceNameGrpc.IServiceName.");
    }
    final Method dubboStubMethod;
    try {
        dubboStubMethod = enclosingClass.getDeclaredMethod("getDubboStub", Channel.class, CallOptions.class, URL.class, ReferenceConfigBase.class);
    } catch (NoSuchMethodException e) {
        throw new IllegalArgumentException("Does not find getDubboStub in " + enclosingClass.getName() + ", please use the customized protoc-gen-dubbo-java to update the generated classes.");
    }
    // Channel
    ReferenceCountManagedChannel channel = getSharedChannel(url);
    // CallOptions
    try {
        @SuppressWarnings("unchecked") final T stub = (T) dubboStubMethod.invoke(null, channel, GrpcOptionsUtils.buildCallOptions(url), url, ApplicationModel.getConsumerModel(url.getServiceKey()).getReferenceConfig());
        final Invoker<T> target = proxyFactory.getInvoker(stub, type, url);
        GrpcInvoker<T> grpcInvoker = new GrpcInvoker<>(type, url, target, channel);
        invokers.add(grpcInvoker);
        return grpcInvoker;
    } catch (IllegalAccessException | InvocationTargetException e) {
        throw new IllegalStateException("Could not create stub through reflection.", e);
    }
}