Examples with CreateSubchannelArgs io.grpc.LoadBalancer.CreateSubchannelArgs used on opensource projects

Example 6 with CreateSubchannelArgs

use of io.grpc.LoadBalancer.CreateSubchannelArgs in project grpc-java by grpc.

the class PickFirstLoadBalancerTest method pickAfterStateChangeAfterResolution.

@Test
public void pickAfterStateChangeAfterResolution() throws Exception {
    InOrder inOrder = inOrder(mockHelper);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setAttributes(affinity).build());
    inOrder.verify(mockHelper).createSubchannel(createArgsCaptor.capture());
    CreateSubchannelArgs args = createArgsCaptor.getValue();
    assertThat(args.getAddresses()).isEqualTo(servers);
    verify(mockSubchannel).start(stateListenerCaptor.capture());
    SubchannelStateListener stateListener = stateListenerCaptor.getValue();
    verify(mockHelper).updateBalancingState(eq(CONNECTING), pickerCaptor.capture());
    Subchannel subchannel = pickerCaptor.getValue().pickSubchannel(mockArgs).getSubchannel();
    reset(mockHelper);
    when(mockHelper.getSynchronizationContext()).thenReturn(syncContext);
    Status error = Status.UNAVAILABLE.withDescription("boom!");
    stateListener.onSubchannelState(ConnectivityStateInfo.forTransientFailure(error));
    inOrder.verify(mockHelper).refreshNameResolution();
    inOrder.verify(mockHelper).updateBalancingState(eq(TRANSIENT_FAILURE), pickerCaptor.capture());
    assertEquals(error, pickerCaptor.getValue().pickSubchannel(mockArgs).getStatus());
    stateListener.onSubchannelState(ConnectivityStateInfo.forNonError(IDLE));
    inOrder.verify(mockHelper).refreshNameResolution();
    inOrder.verify(mockHelper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    assertEquals(Status.OK, pickerCaptor.getValue().pickSubchannel(mockArgs).getStatus());
    stateListener.onSubchannelState(ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(mockHelper).updateBalancingState(eq(READY), pickerCaptor.capture());
    assertEquals(subchannel, pickerCaptor.getValue().pickSubchannel(mockArgs).getSubchannel());
    // Don't care
    verify(mockHelper, atLeast(0)).getSynchronizationContext();
    verifyNoMoreInteractions(mockHelper);
}

Example 7 with CreateSubchannelArgs

use of io.grpc.LoadBalancer.CreateSubchannelArgs in project grpc-java by grpc.

the class PickFirstLoadBalancerTest method pickAfterResolved.

@Test
public void pickAfterResolved() throws Exception {
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setAttributes(affinity).build());
    verify(mockHelper).createSubchannel(createArgsCaptor.capture());
    CreateSubchannelArgs args = createArgsCaptor.getValue();
    assertThat(args.getAddresses()).isEqualTo(servers);
    verify(mockHelper).updateBalancingState(eq(CONNECTING), pickerCaptor.capture());
    verify(mockSubchannel).requestConnection();
    // Calling pickSubchannel() twice gave the same result
    assertEquals(pickerCaptor.getValue().pickSubchannel(mockArgs), pickerCaptor.getValue().pickSubchannel(mockArgs));
    verifyNoMoreInteractions(mockHelper);
}

Example 8 with CreateSubchannelArgs

use of io.grpc.LoadBalancer.CreateSubchannelArgs in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method switchMode_nullLbPolicy.

@Test
public void switchMode_nullLbPolicy() throws Exception {
    InOrder inOrder = inOrder(helper);
    final List<EquivalentAddressGroup> grpclbBalancerList = createResolvedBalancerAddresses(1);
    deliverResolvedAddresses(Collections.<EquivalentAddressGroup>emptyList(), grpclbBalancerList);
    assertEquals(1, fakeOobChannels.size());
    ManagedChannel oobChannel = fakeOobChannels.poll();
    verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    StreamObserver<LoadBalanceResponse> lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    StreamObserver<LoadBalanceRequest> lbRequestObserver = lbRequestObservers.poll();
    verify(lbRequestObserver).onNext(eq(LoadBalanceRequest.newBuilder().setInitialRequest(InitialLoadBalanceRequest.newBuilder().setName(SERVICE_AUTHORITY).build()).build()));
    // 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()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildInitialResponse());
    lbResponseObserver.onNext(buildLbResponse(backends1));
    // ROUND_ROBIN: create one subchannel per server
    verify(subchannelPool).takeOrCreateSubchannel(eq(new EquivalentAddressGroup(backends1.get(0).addr, LB_BACKEND_ATTRS)), any(Attributes.class));
    verify(subchannelPool).takeOrCreateSubchannel(eq(new EquivalentAddressGroup(backends1.get(1).addr, LB_BACKEND_ATTRS)), any(Attributes.class));
    inOrder.verify(helper).updateBalancingState(eq(CONNECTING), any(SubchannelPicker.class));
    assertEquals(2, mockSubchannels.size());
    Subchannel subchannel1 = mockSubchannels.poll();
    Subchannel subchannel2 = mockSubchannels.poll();
    verify(subchannelPool, never()).returnSubchannel(any(Subchannel.class), any(ConnectivityStateInfo.class));
    // Switch to PICK_FIRST
    deliverResolvedAddresses(Collections.<EquivalentAddressGroup>emptyList(), grpclbBalancerList, GrpclbConfig.create(Mode.PICK_FIRST));
    // GrpclbState will be shutdown, and a new one will be created
    assertThat(oobChannel.isShutdown()).isTrue();
    verify(subchannelPool).returnSubchannel(same(subchannel1), eq(ConnectivityStateInfo.forNonError(IDLE)));
    verify(subchannelPool).returnSubchannel(same(subchannel2), eq(ConnectivityStateInfo.forNonError(IDLE)));
    // A new LB stream is created
    assertEquals(1, fakeOobChannels.size());
    verify(mockLbService, times(2)).balanceLoad(lbResponseObserverCaptor.capture());
    lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    lbRequestObserver = lbRequestObservers.poll();
    verify(lbRequestObserver).onNext(eq(LoadBalanceRequest.newBuilder().setInitialRequest(InitialLoadBalanceRequest.newBuilder().setName(SERVICE_AUTHORITY).build()).build()));
    // Simulate receiving LB response
    inOrder.verify(helper, never()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildInitialResponse());
    lbResponseObserver.onNext(buildLbResponse(backends1));
    // PICK_FIRST Subchannel
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    CreateSubchannelArgs createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(new EquivalentAddressGroup(backends1.get(0).addr, eagAttrsWithToken("token0001")), new EquivalentAddressGroup(backends1.get(1).addr, eagAttrsWithToken("token0002")));
    inOrder.verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
}

Example 9 with CreateSubchannelArgs

use of io.grpc.LoadBalancer.CreateSubchannelArgs in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method grpclbWorking_pickFirstMode.

@Test
public void grpclbWorking_pickFirstMode() throws Exception {
    InOrder inOrder = inOrder(helper);
    List<EquivalentAddressGroup> grpclbBalancerList = createResolvedBalancerAddresses(1);
    deliverResolvedAddresses(Collections.<EquivalentAddressGroup>emptyList(), grpclbBalancerList, GrpclbConfig.create(Mode.PICK_FIRST));
    assertEquals(1, fakeOobChannels.size());
    verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    StreamObserver<LoadBalanceResponse> lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    StreamObserver<LoadBalanceRequest> lbRequestObserver = lbRequestObservers.poll();
    verify(lbRequestObserver).onNext(eq(LoadBalanceRequest.newBuilder().setInitialRequest(InitialLoadBalanceRequest.newBuilder().setName(SERVICE_AUTHORITY).build()).build()));
    // 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()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildInitialResponse());
    lbResponseObserver.onNext(buildLbResponse(backends1));
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    CreateSubchannelArgs createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(new EquivalentAddressGroup(backends1.get(0).addr, eagAttrsWithToken("token0001")), new EquivalentAddressGroup(backends1.get(1).addr, eagAttrsWithToken("token0002")));
    // Initially IDLE
    inOrder.verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    RoundRobinPicker picker0 = (RoundRobinPicker) pickerCaptor.getValue();
    // Only one subchannel is created
    assertThat(mockSubchannels).hasSize(1);
    Subchannel subchannel = mockSubchannels.poll();
    assertThat(picker0.dropList).containsExactly(null, null);
    assertThat(picker0.pickList).containsExactly(new IdleSubchannelEntry(subchannel, syncContext));
    // PICK_FIRST doesn't eagerly connect
    verify(subchannel, never()).requestConnection();
    // CONNECTING
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(CONNECTING));
    inOrder.verify(helper).updateBalancingState(eq(CONNECTING), pickerCaptor.capture());
    RoundRobinPicker picker1 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker1.dropList).containsExactly(null, null);
    assertThat(picker1.pickList).containsExactly(BUFFER_ENTRY);
    // TRANSIENT_FAILURE
    Status error = Status.UNAVAILABLE.withDescription("Simulated connection error");
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forTransientFailure(error));
    inOrder.verify(helper).updateBalancingState(eq(TRANSIENT_FAILURE), pickerCaptor.capture());
    RoundRobinPicker picker2 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker2.dropList).containsExactly(null, null);
    assertThat(picker2.pickList).containsExactly(new ErrorEntry(error));
    // READY
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    RoundRobinPicker picker3 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker3.dropList).containsExactly(null, null);
    assertThat(picker3.pickList).containsExactly(new BackendEntry(subchannel, new TokenAttachingTracerFactory(getLoadRecorder())));
    // New server list with drops
    List<ServerEntry> backends2 = Arrays.asList(new ServerEntry("127.0.0.1", 2000, "token0001"), // drop
    new ServerEntry("token0003"), new ServerEntry("127.0.0.1", 2020, "token0004"));
    inOrder.verify(helper, never()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildLbResponse(backends2));
    // new addresses will be updated to the existing subchannel
    // createSubchannel() has ever been called only once
    verify(helper, times(1)).createSubchannel(any(CreateSubchannelArgs.class));
    assertThat(mockSubchannels).isEmpty();
    verify(subchannel).updateAddresses(eq(Arrays.asList(new EquivalentAddressGroup(backends2.get(0).addr, eagAttrsWithToken("token0001")), new EquivalentAddressGroup(backends2.get(2).addr, eagAttrsWithToken("token0004")))));
    inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    RoundRobinPicker picker4 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker4.dropList).containsExactly(null, new DropEntry(getLoadRecorder(), "token0003"), null);
    assertThat(picker4.pickList).containsExactly(new BackendEntry(subchannel, new TokenAttachingTracerFactory(getLoadRecorder())));
    // Subchannel goes IDLE, but PICK_FIRST will not try to reconnect
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(IDLE));
    inOrder.verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    RoundRobinPicker picker5 = (RoundRobinPicker) pickerCaptor.getValue();
    verify(subchannel, never()).requestConnection();
    // ... until it's selected
    PickSubchannelArgs args = mock(PickSubchannelArgs.class);
    PickResult pick = picker5.pickSubchannel(args);
    assertThat(pick).isSameInstanceAs(PickResult.withNoResult());
    verify(subchannel).requestConnection();
    // ... or requested by application
    balancer.requestConnection();
    verify(subchannel, times(2)).requestConnection();
    // PICK_FIRST doesn't use subchannelPool
    verify(subchannelPool, never()).takeOrCreateSubchannel(any(EquivalentAddressGroup.class), any(Attributes.class));
    verify(subchannelPool, never()).returnSubchannel(any(Subchannel.class), any(ConnectivityStateInfo.class));
}

Example 10 with CreateSubchannelArgs

use of io.grpc.LoadBalancer.CreateSubchannelArgs in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method grpclbWorking_pickFirstMode_lbSendsEmptyAddress.

@Test
public void grpclbWorking_pickFirstMode_lbSendsEmptyAddress() throws Exception {
    InOrder inOrder = inOrder(helper);
    List<EquivalentAddressGroup> grpclbBalancerList = createResolvedBalancerAddresses(1);
    deliverResolvedAddresses(Collections.<EquivalentAddressGroup>emptyList(), grpclbBalancerList, GrpclbConfig.create(Mode.PICK_FIRST));
    assertEquals(1, fakeOobChannels.size());
    verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    StreamObserver<LoadBalanceResponse> lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    StreamObserver<LoadBalanceRequest> lbRequestObserver = lbRequestObservers.poll();
    verify(lbRequestObserver).onNext(eq(LoadBalanceRequest.newBuilder().setInitialRequest(InitialLoadBalanceRequest.newBuilder().setName(SERVICE_AUTHORITY).build()).build()));
    // 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()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildInitialResponse());
    lbResponseObserver.onNext(buildLbResponse(backends1));
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    CreateSubchannelArgs createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(new EquivalentAddressGroup(backends1.get(0).addr, eagAttrsWithToken("token0001")), new EquivalentAddressGroup(backends1.get(1).addr, eagAttrsWithToken("token0002")));
    // Initially IDLE
    inOrder.verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    RoundRobinPicker picker0 = (RoundRobinPicker) pickerCaptor.getValue();
    // Only one subchannel is created
    assertThat(mockSubchannels).hasSize(1);
    Subchannel subchannel = mockSubchannels.poll();
    assertThat(picker0.dropList).containsExactly(null, null);
    assertThat(picker0.pickList).containsExactly(new IdleSubchannelEntry(subchannel, syncContext));
    // PICK_FIRST doesn't eagerly connect
    verify(subchannel, never()).requestConnection();
    // CONNECTING
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(CONNECTING));
    inOrder.verify(helper).updateBalancingState(eq(CONNECTING), pickerCaptor.capture());
    RoundRobinPicker picker1 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker1.dropList).containsExactly(null, null);
    assertThat(picker1.pickList).containsExactly(BUFFER_ENTRY);
    // TRANSIENT_FAILURE
    Status error = Status.UNAVAILABLE.withDescription("Simulated connection error");
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forTransientFailure(error));
    inOrder.verify(helper).updateBalancingState(eq(TRANSIENT_FAILURE), pickerCaptor.capture());
    RoundRobinPicker picker2 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker2.dropList).containsExactly(null, null);
    assertThat(picker2.pickList).containsExactly(new ErrorEntry(error));
    // READY
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    RoundRobinPicker picker3 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker3.dropList).containsExactly(null, null);
    assertThat(picker3.pickList).containsExactly(new BackendEntry(subchannel, new TokenAttachingTracerFactory(getLoadRecorder())));
    inOrder.verify(helper, never()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    // Empty addresses from LB
    lbResponseObserver.onNext(buildLbResponse(Collections.<ServerEntry>emptyList()));
    // new addresses will be updated to the existing subchannel
    // createSubchannel() has ever been called only once
    inOrder.verify(helper, never()).createSubchannel(any(CreateSubchannelArgs.class));
    assertThat(mockSubchannels).isEmpty();
    verify(subchannel).shutdown();
    // RPC error status includes message of no backends provided by balancer
    inOrder.verify(helper).updateBalancingState(eq(TRANSIENT_FAILURE), pickerCaptor.capture());
    RoundRobinPicker errorPicker = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(errorPicker.pickList).containsExactly(new ErrorEntry(GrpclbState.NO_AVAILABLE_BACKENDS_STATUS));
    lbResponseObserver.onNext(buildLbResponse(Collections.<ServerEntry>emptyList()));
    // Test recover from new LB response with addresses
    // New server list with drops
    List<ServerEntry> backends2 = Arrays.asList(new ServerEntry("127.0.0.1", 2000, "token0001"), // drop
    new ServerEntry("token0003"), new ServerEntry("127.0.0.1", 2020, "token0004"));
    inOrder.verify(helper, never()).updateBalancingState(any(ConnectivityState.class), any(SubchannelPicker.class));
    lbResponseObserver.onNext(buildLbResponse(backends2));
    // new addresses will be updated to the existing subchannel
    inOrder.verify(helper, times(1)).createSubchannel(any(CreateSubchannelArgs.class));
    inOrder.verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    subchannel = mockSubchannels.poll();
    // Subchannel became READY
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(CONNECTING));
    deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    RoundRobinPicker picker4 = (RoundRobinPicker) pickerCaptor.getValue();
    assertThat(picker4.pickList).containsExactly(new BackendEntry(subchannel, new TokenAttachingTracerFactory(getLoadRecorder())));
}