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

Example 6 with EquivalentAddressGroup

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

the class GrpclbLoadBalancer method handleResolvedAddresses.

@Override
public void handleResolvedAddresses(List<ResolvedServerInfoGroup> updatedServers, Attributes attributes) {
    LbPolicy newLbPolicy = attributes.get(GrpclbConstants.ATTR_LB_POLICY);
    // LB addresses and backend addresses are treated separately
    List<LbAddressGroup> newLbAddressGroups = new ArrayList<LbAddressGroup>();
    List<ResolvedServerInfoGroup> newBackendServerInfoGroups = new ArrayList<ResolvedServerInfoGroup>();
    for (ResolvedServerInfoGroup serverInfoGroup : updatedServers) {
        String lbAddrAuthority = serverInfoGroup.getAttributes().get(GrpclbConstants.ATTR_LB_ADDR_AUTHORITY);
        EquivalentAddressGroup eag = serverInfoGroup.toEquivalentAddressGroup();
        if (lbAddrAuthority != null) {
            newLbAddressGroups.add(new LbAddressGroup(eag, lbAddrAuthority));
        } else {
            newBackendServerInfoGroups.add(serverInfoGroup);
        }
    }
    if (newBackendServerInfoGroups.isEmpty()) {
        // handleResolvedAddresses()'s javadoc has guaranteed updatedServers is never empty.
        checkState(!newLbAddressGroups.isEmpty(), "No backend address nor LB address.  updatedServers=%s", updatedServers);
        if (newLbPolicy != LbPolicy.GRPCLB) {
            newLbPolicy = LbPolicy.GRPCLB;
            logger.log(Level.FINE, "[{0}] Switching to GRPCLB because all addresses are balancers", logId);
        }
    }
    if (newLbPolicy == null) {
        logger.log(Level.FINE, "[{0}] New config missing policy. Using PICK_FIRST", logId);
        newLbPolicy = LbPolicy.PICK_FIRST;
    }
    // Switch LB policy if requested
    if (newLbPolicy != lbPolicy) {
        shutdownDelegate();
        shutdownLbComm();
        lbAddressGroups = null;
        currentLbIndex = 0;
        switch(newLbPolicy) {
            case PICK_FIRST:
                delegate = checkNotNull(pickFirstBalancerFactory.newLoadBalancer(helper), "pickFirstBalancerFactory.newLoadBalancer()");
                break;
            case ROUND_ROBIN:
                delegate = checkNotNull(roundRobinBalancerFactory.newLoadBalancer(helper), "roundRobinBalancerFactory.newLoadBalancer()");
                break;
            default:
        }
    }
    lbPolicy = newLbPolicy;
    // Consume the new addresses
    switch(lbPolicy) {
        case PICK_FIRST:
        case ROUND_ROBIN:
            checkNotNull(delegate, "delegate should not be null. newLbPolicy=" + newLbPolicy);
            delegate.handleResolvedAddresses(newBackendServerInfoGroups, attributes);
            break;
        case GRPCLB:
            if (newLbAddressGroups.isEmpty()) {
                shutdownLbComm();
                lbAddressGroups = null;
                handleGrpclbError(Status.UNAVAILABLE.withDescription("NameResolver returned no LB address while asking for GRPCLB"));
            } else {
                // See if the currently used LB server is in the new list.
                int newIndexOfCurrentLb = -1;
                if (lbAddressGroups != null) {
                    LbAddressGroup currentLb = lbAddressGroups.get(currentLbIndex);
                    newIndexOfCurrentLb = newLbAddressGroups.indexOf(currentLb);
                }
                lbAddressGroups = newLbAddressGroups;
                if (newIndexOfCurrentLb == -1) {
                    shutdownLbComm();
                    currentLbIndex = 0;
                    startLbComm();
                } else {
                    // Current LB is still in the list, calibrate index.
                    currentLbIndex = newIndexOfCurrentLb;
                }
            }
            break;
        default:
    }
}

Example 7 with EquivalentAddressGroup

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

the class GrpclbLoadBalancerTest method grpclbWorking.

@Test
public void grpclbWorking() {
    InOrder inOrder = inOrder(helper);
    List<ResolvedServerInfoGroup> grpclbResolutionList = createResolvedServerInfoGroupList(true, true);
    Attributes grpclbResolutionAttrs = Attributes.newBuilder().set(GrpclbConstants.ATTR_LB_POLICY, LbPolicy.GRPCLB).build();
    deliverResolvedAddresses(grpclbResolutionList, grpclbResolutionAttrs);
    assertSame(LbPolicy.GRPCLB, balancer.getLbPolicy());
    assertNull(balancer.getDelegate());
    verify(helper).createOobChannel(eq(grpclbResolutionList.get(0).toEquivalentAddressGroup()), eq(lbAuthority(0)));
    assertEquals(1, fakeOobChannels.size());
    ManagedChannel oobChannel = fakeOobChannels.poll();
    verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    StreamObserver<LoadBalanceResponse> lbResponseObserver = lbResponseObserverCaptor.getValue();
    // Simulate receiving LB response
    List<ServerEntry> backends1 = Arrays.asList(new ServerEntry("127.0.0.1", 2000, "token0001"), new ServerEntry("127.0.0.1", 2010, "token0002"));
    inOrder.verify(helper, never()).updatePicker(any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildInitialResponse());
    lbResponseObserver.onNext(buildLbResponse(backends1));
    inOrder.verify(helper).createSubchannel(eq(new EquivalentAddressGroup(backends1.get(0).addr)), any(Attributes.class));
    inOrder.verify(helper).createSubchannel(eq(new EquivalentAddressGroup(backends1.get(1).addr)), any(Attributes.class));
    assertEquals(2, mockSubchannels.size());
    Subchannel subchannel1 = mockSubchannels.poll();
    Subchannel subchannel2 = mockSubchannels.poll();
    verify(subchannel1).requestConnection();
    verify(subchannel2).requestConnection();
    assertEquals(new EquivalentAddressGroup(backends1.get(0).addr), subchannel1.getAddresses());
    assertEquals(new EquivalentAddressGroup(backends1.get(1).addr), subchannel2.getAddresses());
    // Before any subchannel is READY, a buffer picker will be provided
    inOrder.verify(helper).updatePicker(same(GrpclbLoadBalancer.BUFFER_PICKER));
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forNonError(CONNECTING));
    deliverSubchannelState(subchannel2, ConnectivityStateInfo.forNonError(CONNECTING));
    inOrder.verify(helper, times(2)).updatePicker(same(GrpclbLoadBalancer.BUFFER_PICKER));
    // Let subchannels be connected
    deliverSubchannelState(subchannel2, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker1 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker1.list).containsExactly(new RoundRobinEntry(subchannel2, "token0002"));
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker2 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker2.list).containsExactly(new RoundRobinEntry(subchannel1, "token0001"), new RoundRobinEntry(subchannel2, "token0002")).inOrder();
    // Disconnected subchannels
    verify(subchannel1).requestConnection();
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forNonError(IDLE));
    verify(subchannel1, times(2)).requestConnection();
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker3 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker3.list).containsExactly(new RoundRobinEntry(subchannel2, "token0002"));
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forNonError(CONNECTING));
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker4 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker4.list).containsExactly(new RoundRobinEntry(subchannel2, "token0002"));
    // As long as there is at least one READY subchannel, round robin will work.
    Status error1 = Status.UNAVAILABLE.withDescription("error1");
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forTransientFailure(error1));
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker5 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker5.list).containsExactly(new RoundRobinEntry(subchannel2, "token0002"));
    // If no subchannel is READY, will propagate an error from an arbitrary subchannel (but here
    // only subchannel1 has error).
    verify(subchannel2).requestConnection();
    deliverSubchannelState(subchannel2, ConnectivityStateInfo.forNonError(IDLE));
    verify(subchannel2, times(2)).requestConnection();
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    ErrorPicker picker6 = (ErrorPicker) pickerCaptor.getValue();
    assertNull(picker6.result.getSubchannel());
    assertSame(error1, picker6.result.getStatus());
    // Update backends, with a drop entry
    List<ServerEntry> backends2 = Arrays.asList(// New address
    new ServerEntry("127.0.0.1", 2030, "token0003"), // drop
    null, // Existing address with token changed
    new ServerEntry("127.0.0.1", 2010, "token0004"), // New address appearing second time
    new ServerEntry("127.0.0.1", 2030, "token0005"));
    verify(subchannel1, never()).shutdown();
    lbResponseObserver.onNext(buildLbResponse(backends2));
    // not in backends2, closed
    verify(subchannel1).shutdown();
    // backends2[2], will be kept
    verify(subchannel2, never()).shutdown();
    inOrder.verify(helper, never()).createSubchannel(eq(new EquivalentAddressGroup(backends2.get(2).addr)), any(Attributes.class));
    inOrder.verify(helper).createSubchannel(eq(new EquivalentAddressGroup(backends2.get(0).addr)), any(Attributes.class));
    assertEquals(1, mockSubchannels.size());
    Subchannel subchannel3 = mockSubchannels.poll();
    verify(subchannel3).requestConnection();
    assertEquals(new EquivalentAddressGroup(backends2.get(0).addr), subchannel3.getAddresses());
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker7 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker7.list).containsExactly(GrpclbLoadBalancer.DROP_ENTRY);
    // State updates on obsolete subchannel1 will have no effect
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forNonError(READY));
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forTransientFailure(Status.UNAVAILABLE));
    deliverSubchannelState(subchannel1, ConnectivityStateInfo.forNonError(SHUTDOWN));
    inOrder.verifyNoMoreInteractions();
    deliverSubchannelState(subchannel3, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker8 = (RoundRobinPicker) pickerCaptor.getValue();
    // subchannel2 is still IDLE, thus not in the active list
    assertThat(picker8.list).containsExactly(new RoundRobinEntry(subchannel3, "token0003"), GrpclbLoadBalancer.DROP_ENTRY, new RoundRobinEntry(subchannel3, "token0005")).inOrder();
    // subchannel2 becomes READY and makes it into the list
    deliverSubchannelState(subchannel2, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    RoundRobinPicker picker9 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker9.list).containsExactly(new RoundRobinEntry(subchannel3, "token0003"), GrpclbLoadBalancer.DROP_ENTRY, new RoundRobinEntry(subchannel2, "token0004"), new RoundRobinEntry(subchannel3, "token0005")).inOrder();
    verify(subchannel3, never()).shutdown();
    assertFalse(oobChannel.isShutdown());
    assertEquals(1, lbRequestObservers.size());
    verify(lbRequestObservers.peek(), never()).onCompleted();
    verify(lbRequestObservers.peek(), never()).onError(any(Throwable.class));
}

Example 8 with EquivalentAddressGroup

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

the class RoundRobinLoadBalancerTest method pickAfterResolvedUpdatedHosts.

@Test
public void pickAfterResolvedUpdatedHosts() throws Exception {
    Subchannel removedSubchannel = mock(Subchannel.class);
    Subchannel oldSubchannel = mock(Subchannel.class);
    Subchannel newSubchannel = mock(Subchannel.class);
    for (Subchannel subchannel : Lists.newArrayList(removedSubchannel, oldSubchannel, newSubchannel)) {
        when(subchannel.getAttributes()).thenReturn(Attributes.newBuilder().set(STATE_INFO, new AtomicReference<ConnectivityStateInfo>(ConnectivityStateInfo.forNonError(READY))).build());
    }
    FakeSocketAddress removedAddr = new FakeSocketAddress("removed");
    FakeSocketAddress oldAddr = new FakeSocketAddress("old");
    FakeSocketAddress newAddr = new FakeSocketAddress("new");
    final Map<EquivalentAddressGroup, Subchannel> subchannels2 = Maps.newHashMap();
    subchannels2.put(new EquivalentAddressGroup(removedAddr), removedSubchannel);
    subchannels2.put(new EquivalentAddressGroup(oldAddr), oldSubchannel);
    List<ResolvedServerInfoGroup> currentServers = Lists.newArrayList(ResolvedServerInfoGroup.builder().add(new ResolvedServerInfo(removedAddr)).add(new ResolvedServerInfo(oldAddr)).build());
    doAnswer(new Answer<Subchannel>() {

        @Override
        public Subchannel answer(InvocationOnMock invocation) throws Throwable {
            Object[] args = invocation.getArguments();
            return subchannels2.get(args[0]);
        }
    }).when(mockHelper).createSubchannel(any(EquivalentAddressGroup.class), any(Attributes.class));
    loadBalancer.handleResolvedAddresses(currentServers, affinity);
    InOrder inOrder = inOrder(mockHelper);
    inOrder.verify(mockHelper).updatePicker(pickerCaptor.capture());
    Picker picker = pickerCaptor.getValue();
    assertNull(picker.getStatus());
    assertThat(picker.getList()).containsExactly(removedSubchannel, oldSubchannel);
    verify(removedSubchannel, times(1)).requestConnection();
    verify(oldSubchannel, times(1)).requestConnection();
    assertThat(loadBalancer.getSubchannels()).containsExactly(removedSubchannel, oldSubchannel);
    subchannels2.clear();
    subchannels2.put(new EquivalentAddressGroup(oldAddr), oldSubchannel);
    subchannels2.put(new EquivalentAddressGroup(newAddr), newSubchannel);
    List<ResolvedServerInfoGroup> latestServers = Lists.newArrayList(ResolvedServerInfoGroup.builder().add(new ResolvedServerInfo(oldAddr)).add(new ResolvedServerInfo(newAddr)).build());
    loadBalancer.handleResolvedAddresses(latestServers, affinity);
    verify(newSubchannel, times(1)).requestConnection();
    verify(removedSubchannel, times(1)).shutdown();
    assertThat(loadBalancer.getSubchannels()).containsExactly(oldSubchannel, newSubchannel);
    verify(mockHelper, times(3)).createSubchannel(any(EquivalentAddressGroup.class), any(Attributes.class));
    inOrder.verify(mockHelper).updatePicker(pickerCaptor.capture());
    picker = pickerCaptor.getValue();
    assertNull(picker.getStatus());
    assertThat(picker.getList()).containsExactly(oldSubchannel, newSubchannel);
    verifyNoMoreInteractions(mockHelper);
}

Example 9 with EquivalentAddressGroup

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

the class ManagedChannelImplIdlenessTest method realTransportsHoldsOffIdleness.

@Test
public void realTransportsHoldsOffIdleness() throws Exception {
    final EquivalentAddressGroup addressGroup = addressGroupList.get(1);
    // Start a call, which goes to delayed transport
    ClientCall<String, Integer> call = channel.newCall(method, CallOptions.DEFAULT);
    call.start(mockCallListener, new Metadata());
    // Verify that we have exited the idle mode
    ArgumentCaptor<Helper> helperCaptor = ArgumentCaptor.forClass(null);
    verify(mockLoadBalancerFactory).newLoadBalancer(helperCaptor.capture());
    Helper helper = helperCaptor.getValue();
    assertTrue(channel.inUseStateAggregator.isInUse());
    // Assume LoadBalancer has received an address, then create a subchannel.
    Subchannel subchannel = helper.createSubchannel(addressGroup, Attributes.EMPTY);
    subchannel.requestConnection();
    MockClientTransportInfo t0 = newTransports.poll();
    t0.listener.transportReady();
    SubchannelPicker mockPicker = mock(SubchannelPicker.class);
    when(mockPicker.pickSubchannel(any(PickSubchannelArgs.class))).thenReturn(PickResult.withSubchannel(subchannel));
    helper.updatePicker(mockPicker);
    // Delayed transport creates real streams in the app executor
    executor.runDueTasks();
    // Delayed transport exits in-use, while real transport has not entered in-use yet.
    assertFalse(channel.inUseStateAggregator.isInUse());
    // Now it's in-use
    t0.listener.transportInUse(true);
    assertTrue(channel.inUseStateAggregator.isInUse());
    // As long as the transport is in-use, the channel won't go idle.
    timer.forwardTime(IDLE_TIMEOUT_SECONDS * 2, TimeUnit.SECONDS);
    assertTrue(channel.inUseStateAggregator.isInUse());
    t0.listener.transportInUse(false);
    assertFalse(channel.inUseStateAggregator.isInUse());
    // And allow the channel to go idle.
    timer.forwardTime(IDLE_TIMEOUT_SECONDS - 1, TimeUnit.SECONDS);
    verify(mockLoadBalancer, never()).shutdown();
    timer.forwardTime(1, TimeUnit.SECONDS);
    verify(mockLoadBalancer).shutdown();
}

Example 10 with EquivalentAddressGroup

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

the class InternalSubchannelTest method createInternalSubchannel.

private void createInternalSubchannel(SocketAddress... addrs) {
    addressGroup = new EquivalentAddressGroup(Arrays.asList(addrs));
    internalSubchannel = new InternalSubchannel(addressGroup, AUTHORITY, USER_AGENT, mockBackoffPolicyProvider, mockTransportFactory, fakeClock.getScheduledExecutorService(), fakeClock.getStopwatchSupplier(), channelExecutor, mockInternalSubchannelCallback);
}