Examples with ErrorPicker io.grpc.grpclb.GrpclbLoadBalancer.ErrorPicker used on opensource projects

Example 1 with ErrorPicker

use of io.grpc.grpclb.GrpclbLoadBalancer.ErrorPicker in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method nameResolutionFailsThenRecoverToDelegate.

@Test
public void nameResolutionFailsThenRecoverToDelegate() {
    Status error = Status.NOT_FOUND.withDescription("www.google.com not found");
    deliverNameResolutionError(error);
    verify(helper).updatePicker(pickerCaptor.capture());
    ErrorPicker errorPicker = (ErrorPicker) pickerCaptor.getValue();
    assertSame(error, errorPicker.result.getStatus());
    // Recover with a subsequent success
    List<ResolvedServerInfoGroup> resolvedServers = createResolvedServerInfoGroupList(false);
    Attributes resolutionAttrs = Attributes.newBuilder().set(RESOLUTION_ATTR, "yeah").build();
    deliverResolvedAddresses(resolvedServers, resolutionAttrs);
    verify(pickFirstBalancerFactory).newLoadBalancer(helper);
    verify(pickFirstBalancer).handleResolvedAddresses(eq(resolvedServers), eq(resolutionAttrs));
    verifyNoMoreInteractions(roundRobinBalancerFactory);
    verifyNoMoreInteractions(roundRobinBalancer);
}

Example 2 with ErrorPicker

use of io.grpc.grpclb.GrpclbLoadBalancer.ErrorPicker in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method nameResolutionFailsThenRecoverToGrpclb.

@Test
public void nameResolutionFailsThenRecoverToGrpclb() {
    Status error = Status.NOT_FOUND.withDescription("www.google.com not found");
    deliverNameResolutionError(error);
    verify(helper).updatePicker(pickerCaptor.capture());
    ErrorPicker errorPicker = (ErrorPicker) pickerCaptor.getValue();
    assertSame(error, errorPicker.result.getStatus());
    // Recover with a subsequent success
    List<ResolvedServerInfoGroup> resolvedServers = createResolvedServerInfoGroupList(true);
    EquivalentAddressGroup eag = resolvedServers.get(0).toEquivalentAddressGroup();
    Attributes resolutionAttrs = Attributes.newBuilder().set(GrpclbConstants.ATTR_LB_POLICY, LbPolicy.GRPCLB).build();
    deliverResolvedAddresses(resolvedServers, resolutionAttrs);
    assertSame(LbPolicy.GRPCLB, balancer.getLbPolicy());
    assertNull(balancer.getDelegate());
    verify(helper).createOobChannel(eq(eag), eq(lbAuthority(0)));
    verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    verifyNoMoreInteractions(pickFirstBalancerFactory);
    verifyNoMoreInteractions(pickFirstBalancer);
    verifyNoMoreInteractions(roundRobinBalancerFactory);
    verifyNoMoreInteractions(roundRobinBalancer);
}

Example 3 with ErrorPicker

use of io.grpc.grpclb.GrpclbLoadBalancer.ErrorPicker in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method grpclbBalanerCommErrors.

@Test
public void grpclbBalanerCommErrors() {
    InOrder inOrder = inOrder(helper, mockLbService);
    // Make the first LB address fail to connect
    failingLbAuthorities.add(lbAuthority(0));
    List<ResolvedServerInfoGroup> grpclbResolutionList = createResolvedServerInfoGroupList(true, true, true);
    Attributes grpclbResolutionAttrs = Attributes.newBuilder().set(GrpclbConstants.ATTR_LB_POLICY, LbPolicy.GRPCLB).build();
    deliverResolvedAddresses(grpclbResolutionList, grpclbResolutionAttrs);
    // First LB addr fails to connect
    inOrder.verify(helper).createOobChannel(eq(grpclbResolutionList.get(0).toEquivalentAddressGroup()), eq(lbAuthority(0)));
    inOrder.verify(helper).updatePicker(isA(ErrorPicker.class));
    assertEquals(2, fakeOobChannels.size());
    assertTrue(fakeOobChannels.poll().isShutdown());
    // Will move on to second LB addr
    inOrder.verify(helper).createOobChannel(eq(grpclbResolutionList.get(1).toEquivalentAddressGroup()), eq(lbAuthority(1)));
    inOrder.verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    StreamObserver<LoadBalanceResponse> lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    lbRequestObservers.poll();
    assertEquals(1, fakeOobChannels.size());
    assertFalse(fakeOobChannels.peek().isShutdown());
    Status error1 = Status.UNAVAILABLE.withDescription("error1");
    // Simulate that the stream on the second LB failed
    lbResponseObserver.onError(error1.asException());
    assertTrue(fakeOobChannels.poll().isShutdown());
    inOrder.verify(helper).updatePicker(pickerCaptor.capture());
    ErrorPicker errorPicker = (ErrorPicker) pickerCaptor.getValue();
    assertEquals(error1.getCode(), errorPicker.result.getStatus().getCode());
    assertTrue(errorPicker.result.getStatus().getDescription().contains(error1.getDescription()));
    // Move on to the third LB.
    inOrder.verify(helper).createOobChannel(eq(grpclbResolutionList.get(2).toEquivalentAddressGroup()), eq(lbAuthority(2)));
    inOrder.verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    lbRequestObservers.poll();
    assertEquals(1, fakeOobChannels.size());
    assertFalse(fakeOobChannels.peek().isShutdown());
    // Simulate that the stream on the third LB closed without error.  It is treated
    // as an error.
    lbResponseObserver.onCompleted();
    assertTrue(fakeOobChannels.poll().isShutdown());
    // Loop back to the first LB addr, which still fails.
    inOrder.verify(helper).createOobChannel(eq(grpclbResolutionList.get(0).toEquivalentAddressGroup()), eq(lbAuthority(0)));
    inOrder.verify(helper).updatePicker(isA(ErrorPicker.class));
    assertEquals(2, fakeOobChannels.size());
    assertTrue(fakeOobChannels.poll().isShutdown());
    // Will move on to second LB addr
    inOrder.verify(helper).createOobChannel(eq(grpclbResolutionList.get(1).toEquivalentAddressGroup()), eq(lbAuthority(1)));
    inOrder.verify(mockLbService).balanceLoad(lbResponseObserverCaptor.capture());
    lbResponseObserver = lbResponseObserverCaptor.getValue();
    assertEquals(1, lbRequestObservers.size());
    assertEquals(1, fakeOobChannels.size());
    assertFalse(fakeOobChannels.peek().isShutdown());
    // Finally it works.
    lbResponseObserver.onNext(buildInitialResponse());
    List<ServerEntry> backends = Arrays.asList(new ServerEntry("127.0.0.1", 2000, "token001"), new ServerEntry("127.0.0.1", 2010, "token002"));
    lbResponseObserver.onNext(buildLbResponse(backends));
    inOrder.verify(helper).createSubchannel(eq(new EquivalentAddressGroup(backends.get(0).addr)), any(Attributes.class));
    inOrder.verify(helper).createSubchannel(eq(new EquivalentAddressGroup(backends.get(1).addr)), any(Attributes.class));
    inOrder.verify(helper).updatePicker(same(GrpclbLoadBalancer.BUFFER_PICKER));
    inOrder.verifyNoMoreInteractions();
}

Example 4 with ErrorPicker

use of io.grpc.grpclb.GrpclbLoadBalancer.ErrorPicker in project grpc-java by grpc.

the class GrpclbLoadBalancerTest method errorPicker.

@Test
public void errorPicker() {
    PickSubchannelArgs mockArgs = mock(PickSubchannelArgs.class);
    Status error = Status.UNAVAILABLE.withDescription("Just don't know why");
    ErrorPicker picker = new ErrorPicker(error);
    assertSame(error, picker.pickSubchannel(mockArgs).getStatus());
    verifyNoMoreInteractions(mockArgs);
}