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

Example 1 with ResolvedServerInfo

use of io.grpc.ResolvedServerInfo 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";
        }
    };
    final ResolvedServerInfo goodServer = new ResolvedServerInfo(goodAddress, Attributes.EMPTY);
    final ResolvedServerInfo badServer = new ResolvedServerInfo(badAddress, Attributes.EMPTY);
    InOrder inOrder = inOrder(mockLoadBalancer);
    ResolvedServerInfoGroup serverInfoGroup = ResolvedServerInfoGroup.builder().add(badServer).add(goodServer).build();
    FakeNameResolverFactory nameResolverFactory = new FakeNameResolverFactory(serverInfoGroup.getResolvedServerInfoList());
    createChannel(nameResolverFactory, NO_INTERCEPTOR);
    // 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
    inOrder.verify(mockLoadBalancer).handleResolvedAddresses(eq(Arrays.asList(serverInfoGroup)), eq(Attributes.EMPTY));
    Subchannel subchannel = helper.createSubchannel(serverInfoGroup.toEquivalentAddressGroup(), Attributes.EMPTY);
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    subchannel.requestConnection();
    inOrder.verify(mockLoadBalancer).handleSubchannelState(same(subchannel), stateInfoCaptor.capture());
    assertEquals(CONNECTING, stateInfoCaptor.getValue().getState());
    // The channel will starts with the first address (badAddress)
    verify(mockTransportFactory).newClientTransport(same(badAddress), any(String.class), any(String.class));
    verify(mockTransportFactory, times(0)).newClientTransport(same(goodAddress), any(String.class), any(String.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(String.class), any(String.class));
    MockClientTransportInfo goodTransportInfo = transports.poll();
    when(goodTransportInfo.transport.newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), any(StatsTraceContext.class))).thenReturn(mock(ClientStream.class));
    goodTransportInfo.listener.transportReady();
    inOrder.verify(mockLoadBalancer).handleSubchannelState(same(subchannel), stateInfoCaptor.capture());
    assertEquals(READY, stateInfoCaptor.getValue().getState());
    // A typical LoadBalancer will call this once the subchannel becomes READY
    helper.updatePicker(mockPicker);
    // Delayed transport uses the app executor to create real streams.
    executor.runDueTasks();
    verify(goodTransportInfo.transport).newStream(same(method), same(headers), same(CallOptions.DEFAULT), any(StatsTraceContext.class));
    // The bad transport was never used.
    verify(badTransportInfo.transport, times(0)).newStream(any(MethodDescriptor.class), any(Metadata.class), any(CallOptions.class), any(StatsTraceContext.class));
}

Example 2 with ResolvedServerInfo

use of io.grpc.ResolvedServerInfo 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";
        }
    };
    final ResolvedServerInfo server1 = new ResolvedServerInfo(addr1, Attributes.EMPTY);
    final ResolvedServerInfo server2 = new ResolvedServerInfo(addr2, Attributes.EMPTY);
    InOrder inOrder = inOrder(mockLoadBalancer);
    ResolvedServerInfoGroup serverInfoGroup = ResolvedServerInfoGroup.builder().add(server1).add(server2).build();
    FakeNameResolverFactory nameResolverFactory = new FakeNameResolverFactory(serverInfoGroup.getResolvedServerInfoList());
    createChannel(nameResolverFactory, NO_INTERCEPTOR);
    // 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
    inOrder.verify(mockLoadBalancer).handleResolvedAddresses(eq(Arrays.asList(serverInfoGroup)), eq(Attributes.EMPTY));
    Subchannel subchannel = helper.createSubchannel(serverInfoGroup.toEquivalentAddressGroup(), Attributes.EMPTY);
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    subchannel.requestConnection();
    inOrder.verify(mockLoadBalancer).handleSubchannelState(same(subchannel), stateInfoCaptor.capture());
    assertEquals(CONNECTING, stateInfoCaptor.getValue().getState());
    // Connecting to server1, which will fail
    verify(mockTransportFactory).newClientTransport(same(addr1), any(String.class), any(String.class));
    verify(mockTransportFactory, times(0)).newClientTransport(same(addr2), any(String.class), any(String.class));
    MockClientTransportInfo transportInfo1 = transports.poll();
    transportInfo1.listener.transportShutdown(Status.UNAVAILABLE);
    // Connecting to server2, which will fail too
    verify(mockTransportFactory).newClientTransport(same(addr2), any(String.class), any(String.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(mockLoadBalancer).handleSubchannelState(same(subchannel), 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));
    helper.updatePicker(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));
    verify(transportInfo2.transport, times(0)).newStream(any(MethodDescriptor.class), any(Metadata.class));
}

Example 3 with ResolvedServerInfo

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

the class RoundRobinLoadBalancerTest method setUp.

@Before
public void setUp() {
    MockitoAnnotations.initMocks(this);
    for (int i = 0; i < 3; i++) {
        SocketAddress addr = new FakeSocketAddress("server" + i);
        EquivalentAddressGroup eag = new EquivalentAddressGroup(addr);
        servers.put(ResolvedServerInfoGroup.builder().add(new ResolvedServerInfo(addr)).build(), eag);
        subchannels.put(eag, mock(Subchannel.class));
    }
    when(mockHelper.createSubchannel(any(EquivalentAddressGroup.class), any(Attributes.class))).then(new Answer<Subchannel>() {

        @Override
        public Subchannel answer(InvocationOnMock invocation) throws Throwable {
            Object[] args = invocation.getArguments();
            Subchannel subchannel = subchannels.get(args[0]);
            when(subchannel.getAttributes()).thenReturn((Attributes) args[1]);
            return subchannel;
        }
    });
    loadBalancer = (RoundRobinLoadBalancer) RoundRobinLoadBalancerFactory.getInstance().newLoadBalancer(mockHelper);
}

Example 4 with ResolvedServerInfo

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

the class DnsSrvNameResolver method getServers.

@Override
protected List<ResolvedServerInfo> getServers() {
    try {
        DirContext ctx = new InitialDirContext(ENV);
        NamingEnumeration<?> resolved = ctx.getAttributes(name, ATTRIBUTE_IDS).get("srv").getAll();
        List<ResolvedServerInfo> servers = new LinkedList<>();
        while (resolved.hasMore()) {
            servers.add(srvRecordToServerInfo((String) resolved.next()));
        }
        return servers;
    } catch (Exception e) {
        LOGGER.warn("", e);
    }
    return Collections.emptyList();
}

Example 5 with ResolvedServerInfo

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

the class ManagedChannelImplIdlenessTest method setUp.

@Before
public void setUp() {
    MockitoAnnotations.initMocks(this);
    when(timerServicePool.getObject()).thenReturn(timer.getScheduledExecutorService());
    when(executorPool.getObject()).thenReturn(executor.getScheduledExecutorService());
    when(oobExecutorPool.getObject()).thenReturn(oobExecutor.getScheduledExecutorService());
    when(mockLoadBalancerFactory.newLoadBalancer(any(Helper.class))).thenReturn(mockLoadBalancer);
    when(mockNameResolver.getServiceAuthority()).thenReturn(AUTHORITY);
    when(mockNameResolverFactory.newNameResolver(any(URI.class), any(Attributes.class))).thenReturn(mockNameResolver);
    channel = new ManagedChannelImpl("fake://target", new FakeBackoffPolicyProvider(), mockNameResolverFactory, Attributes.EMPTY, mockLoadBalancerFactory, mockTransportFactory, DecompressorRegistry.getDefaultInstance(), CompressorRegistry.getDefaultInstance(), timerServicePool, executorPool, oobExecutorPool, timer.getStopwatchSupplier(), TimeUnit.SECONDS.toMillis(IDLE_TIMEOUT_SECONDS), USER_AGENT, Collections.<ClientInterceptor>emptyList(), NoopStatsContextFactory.INSTANCE);
    newTransports = TestUtils.captureTransports(mockTransportFactory);
    for (int i = 0; i < 2; i++) {
        ResolvedServerInfoGroup.Builder resolvedServerInfoGroup = ResolvedServerInfoGroup.builder();
        for (int j = 0; j < 2; j++) {
            resolvedServerInfoGroup.add(new ResolvedServerInfo(new FakeSocketAddress("servergroup" + i + "server" + j)));
        }
        servers.add(resolvedServerInfoGroup.build());
        addressGroupList.add(resolvedServerInfoGroup.build().toEquivalentAddressGroup());
    }
    verify(mockNameResolverFactory).newNameResolver(any(URI.class), any(Attributes.class));
    // Verify the initial idleness
    verify(mockLoadBalancerFactory, never()).newLoadBalancer(any(Helper.class));
    verify(mockTransportFactory, never()).newClientTransport(any(SocketAddress.class), anyString(), anyString());
    verify(mockNameResolver, never()).start(any(NameResolver.Listener.class));
}