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

Example 76 with EquivalentAddressGroup

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

the class ManagedChannelImplTest method allServersFailedToConnect.

/**
 * Verify that if all resolved addresses failed to connect, a fail-fast call will fail, while a
 * wait-for-ready call will still be buffered.
 */
@Test
public void allServersFailedToConnect() throws Exception {
    final SocketAddress addr1 = new SocketAddress() {

        @Override
        public String toString() {
            return "addr1";
        }
    };
    final SocketAddress addr2 = new SocketAddress() {

        @Override
        public String toString() {
            return "addr2";
        }
    };
    InOrder inOrder = inOrder(mockLoadBalancer, subchannelStateListener);
    List<SocketAddress> resolvedAddrs = Arrays.asList(addr1, addr2);
    FakeNameResolverFactory nameResolverFactory = new FakeNameResolverFactory.Builder(expectedUri).setServers(Collections.singletonList(new EquivalentAddressGroup(resolvedAddrs))).build();
    channelBuilder.nameResolverFactory(nameResolverFactory);
    createChannel();
    // Start a wait-for-ready call
    ClientCall<String, Integer> call = channel.newCall(method, CallOptions.DEFAULT.withWaitForReady());
    Metadata headers = new Metadata();
    call.start(mockCallListener, headers);
    // ... and a fail-fast call
    ClientCall<String, Integer> call2 = channel.newCall(method, CallOptions.DEFAULT.withoutWaitForReady());
    call2.start(mockCallListener2, headers);
    executor.runDueTasks();
    // Simulate name resolution results
    EquivalentAddressGroup addressGroup = new EquivalentAddressGroup(resolvedAddrs);
    inOrder.verify(mockLoadBalancer).handleResolvedAddresses(resolvedAddressCaptor.capture());
    assertThat(resolvedAddressCaptor.getValue().getAddresses()).containsExactly(addressGroup);
    Subchannel subchannel = createSubchannelSafely(helper, addressGroup, Attributes.EMPTY, subchannelStateListener);
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    requestConnectionSafely(helper, subchannel);
    inOrder.verify(subchannelStateListener).onSubchannelState(stateInfoCaptor.capture());
    assertEquals(CONNECTING, stateInfoCaptor.getValue().getState());
    // Connecting to server1, which will fail
    verify(mockTransportFactory).newClientTransport(same(addr1), any(ClientTransportOptions.class), any(ChannelLogger.class));
    verify(mockTransportFactory, times(0)).newClientTransport(same(addr2), any(ClientTransportOptions.class), any(ChannelLogger.class));
    MockClientTransportInfo transportInfo1 = transports.poll();
    transportInfo1.listener.transportShutdown(Status.UNAVAILABLE);
    // Connecting to server2, which will fail too
    verify(mockTransportFactory).newClientTransport(same(addr2), any(ClientTransportOptions.class), any(ChannelLogger.class));
    MockClientTransportInfo transportInfo2 = transports.poll();
    Status server2Error = Status.UNAVAILABLE.withDescription("Server2 failed to connect");
    transportInfo2.listener.transportShutdown(server2Error);
    // ... which makes the subchannel enter TRANSIENT_FAILURE. The last error Status is propagated
    // to LoadBalancer.
    inOrder.verify(subchannelStateListener).onSubchannelState(stateInfoCaptor.capture());
    assertEquals(TRANSIENT_FAILURE, stateInfoCaptor.getValue().getState());
    assertSame(server2Error, stateInfoCaptor.getValue().getStatus());
    // A typical LoadBalancer would create a picker with error
    SubchannelPicker picker2 = mock(SubchannelPicker.class);
    when(picker2.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withError(server2Error));
    updateBalancingStateSafely(helper, TRANSIENT_FAILURE, picker2);
    executor.runDueTasks();
    // ... which fails the fail-fast call
    verify(mockCallListener2).onClose(same(server2Error), any(Metadata.class));
    // ... while the wait-for-ready call stays
    verifyNoMoreInteractions(mockCallListener);
    // No real stream was ever created
    verify(transportInfo1.transport, times(0)).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
    verify(transportInfo2.transport, times(0)).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
}

Example 77 with EquivalentAddressGroup

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

the class ManagedChannelImplTest method firstResolvedServerFailedToConnect.

/**
 * Verify that if the first resolved address points to a server that cannot be connected, the call
 * will end up with the second address which works.
 */
@Test
public void firstResolvedServerFailedToConnect() throws Exception {
    final SocketAddress goodAddress = new SocketAddress() {

        @Override
        public String toString() {
            return "goodAddress";
        }
    };
    final SocketAddress badAddress = new SocketAddress() {

        @Override
        public String toString() {
            return "badAddress";
        }
    };
    InOrder inOrder = inOrder(mockLoadBalancer, subchannelStateListener);
    List<SocketAddress> resolvedAddrs = Arrays.asList(badAddress, goodAddress);
    FakeNameResolverFactory nameResolverFactory = new FakeNameResolverFactory.Builder(expectedUri).setServers(Collections.singletonList(new EquivalentAddressGroup(resolvedAddrs))).build();
    channelBuilder.nameResolverFactory(nameResolverFactory);
    createChannel();
    // Start the call
    ClientCall<String, Integer> call = channel.newCall(method, CallOptions.DEFAULT);
    Metadata headers = new Metadata();
    call.start(mockCallListener, headers);
    executor.runDueTasks();
    // Simulate name resolution results
    EquivalentAddressGroup addressGroup = new EquivalentAddressGroup(resolvedAddrs);
    inOrder.verify(mockLoadBalancer).handleResolvedAddresses(resolvedAddressCaptor.capture());
    assertThat(resolvedAddressCaptor.getValue().getAddresses()).containsExactly(addressGroup);
    Subchannel subchannel = createSubchannelSafely(helper, addressGroup, Attributes.EMPTY, subchannelStateListener);
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    requestConnectionSafely(helper, subchannel);
    inOrder.verify(subchannelStateListener).onSubchannelState(stateInfoCaptor.capture());
    assertEquals(CONNECTING, stateInfoCaptor.getValue().getState());
    // The channel will starts with the first address (badAddress)
    verify(mockTransportFactory).newClientTransport(same(badAddress), any(ClientTransportOptions.class), any(ChannelLogger.class));
    verify(mockTransportFactory, times(0)).newClientTransport(same(goodAddress), any(ClientTransportOptions.class), any(ChannelLogger.class));
    MockClientTransportInfo badTransportInfo = transports.poll();
    // Which failed to connect
    badTransportInfo.listener.transportShutdown(Status.UNAVAILABLE);
    inOrder.verifyNoMoreInteractions();
    // The channel then try the second address (goodAddress)
    verify(mockTransportFactory).newClientTransport(same(goodAddress), any(ClientTransportOptions.class), any(ChannelLogger.class));
    MockClientTransportInfo goodTransportInfo = transports.poll();
    when(goodTransportInfo.transport.newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any())).thenReturn(mock(ClientStream.class));
    goodTransportInfo.listener.transportReady();
    inOrder.verify(subchannelStateListener).onSubchannelState(stateInfoCaptor.capture());
    assertEquals(READY, stateInfoCaptor.getValue().getState());
    // A typical LoadBalancer will call this once the subchannel becomes READY
    updateBalancingStateSafely(helper, READY, mockPicker);
    // Delayed transport uses the app executor to create real streams.
    executor.runDueTasks();
    verify(goodTransportInfo.transport).newStream(same(method), same(headers), same(CallOptions.DEFAULT), ArgumentMatchers.<ClientStreamTracer[]>any());
    // The bad transport was never used.
    verify(badTransportInfo.transport, times(0)).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
}

Example 78 with EquivalentAddressGroup

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

the class ManagedChannelImplTest method channelTracing_nameResolvedEvent_zeorAndNonzeroBackends.

@Test
public void channelTracing_nameResolvedEvent_zeorAndNonzeroBackends() throws Exception {
    timer.forwardNanos(1234);
    channelBuilder.maxTraceEvents(10);
    List<EquivalentAddressGroup> servers = new ArrayList<>();
    servers.add(new EquivalentAddressGroup(socketAddress));
    FakeNameResolverFactory nameResolverFactory = new FakeNameResolverFactory.Builder(expectedUri).setServers(servers).build();
    channelBuilder.nameResolverFactory(nameResolverFactory);
    createChannel();
    int prevSize = getStats(channel).channelTrace.events.size();
    ResolutionResult resolutionResult1 = ResolutionResult.newBuilder().setAddresses(Collections.singletonList(new EquivalentAddressGroup(Arrays.asList(new SocketAddress() {
    }, new SocketAddress() {
    })))).build();
    nameResolverFactory.resolvers.get(0).listener.onResult(resolutionResult1);
    assertThat(getStats(channel).channelTrace.events).hasSize(prevSize);
    prevSize = getStats(channel).channelTrace.events.size();
    nameResolverFactory.resolvers.get(0).listener.onError(Status.INTERNAL);
    assertThat(getStats(channel).channelTrace.events).hasSize(prevSize + 1);
    prevSize = getStats(channel).channelTrace.events.size();
    nameResolverFactory.resolvers.get(0).listener.onError(Status.INTERNAL);
    assertThat(getStats(channel).channelTrace.events).hasSize(prevSize);
    prevSize = getStats(channel).channelTrace.events.size();
    ResolutionResult resolutionResult2 = ResolutionResult.newBuilder().setAddresses(Collections.singletonList(new EquivalentAddressGroup(Arrays.asList(new SocketAddress() {
    }, new SocketAddress() {
    })))).build();
    nameResolverFactory.resolvers.get(0).listener.onResult(resolutionResult2);
    assertThat(getStats(channel).channelTrace.events).hasSize(prevSize + 1);
}

Example 79 with EquivalentAddressGroup

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

the class ManagedChannelImplTest method enterIdle_exitsIdleIfDelayedStreamPending.

@Test
public void enterIdle_exitsIdleIfDelayedStreamPending() {
    FakeNameResolverFactory nameResolverFactory = new FakeNameResolverFactory.Builder(expectedUri).setServers(Collections.singletonList(new EquivalentAddressGroup(socketAddress))).build();
    channelBuilder.nameResolverFactory(nameResolverFactory);
    createChannel();
    // Start a call that will be buffered in delayedTransport
    ClientCall<String, Integer> call = channel.newCall(method, CallOptions.DEFAULT);
    call.start(mockCallListener, new Metadata());
    // enterIdle() will shut down the name resolver and lb policy used to get a pick for the delayed
    // call
    channel.enterIdle();
    assertEquals(IDLE, channel.getState(false));
    // enterIdle() will restart the delayed call by exiting idle. This creates a new helper.
    ArgumentCaptor<Helper> helperCaptor = ArgumentCaptor.forClass(Helper.class);
    verify(mockLoadBalancerProvider, times(2)).newLoadBalancer(helperCaptor.capture());
    Helper helper2 = helperCaptor.getValue();
    // Establish a connection
    Subchannel subchannel = createSubchannelSafely(helper2, addressGroup, Attributes.EMPTY, subchannelStateListener);
    requestConnectionSafely(helper, subchannel);
    ClientStream mockStream = mock(ClientStream.class);
    MockClientTransportInfo transportInfo = transports.poll();
    ConnectionClientTransport mockTransport = transportInfo.transport;
    ManagedClientTransport.Listener transportListener = transportInfo.listener;
    when(mockTransport.newStream(same(method), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any())).thenReturn(mockStream);
    transportListener.transportReady();
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    updateBalancingStateSafely(helper2, READY, mockPicker);
    assertEquals(READY, channel.getState(false));
    // Verify the original call was drained
    executor.runDueTasks();
    verify(mockTransport).newStream(same(method), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
    verify(mockStream).start(any(ClientStreamListener.class));
}

Example 80 with EquivalentAddressGroup

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

the class ManagedChannelImplTest method informationPropagatedToNewStreamAndCallCredentials.

/**
 * Test that information such as the Call's context, MethodDescriptor, authority, executor are
 * propagated to newStream() and applyRequestMetadata().
 */
@Test
public void informationPropagatedToNewStreamAndCallCredentials() {
    createChannel();
    CallOptions callOptions = CallOptions.DEFAULT.withCallCredentials(creds);
    final Context.Key<String> testKey = Context.key("testing");
    Context ctx = Context.current().withValue(testKey, "testValue");
    final LinkedList<Context> credsApplyContexts = new LinkedList<>();
    final LinkedList<Context> newStreamContexts = new LinkedList<>();
    doAnswer(new Answer<Void>() {

        @Override
        public Void answer(InvocationOnMock in) throws Throwable {
            credsApplyContexts.add(Context.current());
            return null;
        }
    }).when(creds).applyRequestMetadata(any(RequestInfo.class), any(Executor.class), any(CallCredentials.MetadataApplier.class));
    // First call will be on delayed transport.  Only newCall() is run within the expected context,
    // so that we can verify that the context is explicitly attached before calling newStream() and
    // applyRequestMetadata(), which happens after we detach the context from the thread.
    Context origCtx = ctx.attach();
    assertEquals("testValue", testKey.get());
    ClientCall<String, Integer> call = channel.newCall(method, callOptions);
    ctx.detach(origCtx);
    assertNull(testKey.get());
    call.start(mockCallListener, new Metadata());
    // Simulate name resolution results
    EquivalentAddressGroup addressGroup = new EquivalentAddressGroup(socketAddress);
    Subchannel subchannel = createSubchannelSafely(helper, addressGroup, Attributes.EMPTY, subchannelStateListener);
    requestConnectionSafely(helper, subchannel);
    verify(mockTransportFactory).newClientTransport(same(socketAddress), eq(clientTransportOptions), any(ChannelLogger.class));
    MockClientTransportInfo transportInfo = transports.poll();
    final ConnectionClientTransport transport = transportInfo.transport;
    when(transport.getAttributes()).thenReturn(Attributes.EMPTY);
    doAnswer(new Answer<ClientStream>() {

        @Override
        public ClientStream answer(InvocationOnMock in) throws Throwable {
            newStreamContexts.add(Context.current());
            return mock(ClientStream.class);
        }
    }).when(transport).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
    verify(creds, never()).applyRequestMetadata(any(RequestInfo.class), any(Executor.class), any(CallCredentials.MetadataApplier.class));
    // applyRequestMetadata() is called after the transport becomes ready.
    transportInfo.listener.transportReady();
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    updateBalancingStateSafely(helper, READY, mockPicker);
    executor.runDueTasks();
    ArgumentCaptor<RequestInfo> infoCaptor = ArgumentCaptor.forClass(null);
    ArgumentCaptor<CallCredentials.MetadataApplier> applierCaptor = ArgumentCaptor.forClass(null);
    verify(creds).applyRequestMetadata(infoCaptor.capture(), same(executor.getScheduledExecutorService()), applierCaptor.capture());
    assertEquals("testValue", testKey.get(credsApplyContexts.poll()));
    assertEquals(AUTHORITY, infoCaptor.getValue().getAuthority());
    assertEquals(SecurityLevel.NONE, infoCaptor.getValue().getSecurityLevel());
    verify(transport, never()).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
    // newStream() is called after apply() is called
    applierCaptor.getValue().apply(new Metadata());
    verify(transport).newStream(same(method), any(Metadata.class), same(callOptions), ArgumentMatchers.<ClientStreamTracer[]>any());
    assertEquals("testValue", testKey.get(newStreamContexts.poll()));
    // The context should not live beyond the scope of newStream() and applyRequestMetadata()
    assertNull(testKey.get());
    // Second call will not be on delayed transport
    origCtx = ctx.attach();
    call = channel.newCall(method, callOptions);
    ctx.detach(origCtx);
    call.start(mockCallListener, new Metadata());
    verify(creds, times(2)).applyRequestMetadata(infoCaptor.capture(), same(executor.getScheduledExecutorService()), applierCaptor.capture());
    assertEquals("testValue", testKey.get(credsApplyContexts.poll()));
    assertEquals(AUTHORITY, infoCaptor.getValue().getAuthority());
    assertEquals(SecurityLevel.NONE, infoCaptor.getValue().getSecurityLevel());
    // This is from the first call
    verify(transport).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), ArgumentMatchers.<ClientStreamTracer[]>any());
    // Still, newStream() is called after apply() is called
    applierCaptor.getValue().apply(new Metadata());
    verify(transport, times(2)).newStream(same(method), any(Metadata.class), same(callOptions), ArgumentMatchers.<ClientStreamTracer[]>any());
    assertEquals("testValue", testKey.get(newStreamContexts.poll()));
    assertNull(testKey.get());
}