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

Example 6 with LoadBalancer

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

the class GracefulSwitchLoadBalancerTest method switchWhileOldPolicyGoesFromReadyToNotReadyWhileNewPolicyStillIdle.

@Test
public void switchWhileOldPolicyGoesFromReadyToNotReadyWhileNewPolicyStillIdle() {
    gracefulSwitchLb.switchTo(lbProviders.get(lbPolicies[0]));
    LoadBalancer lb0 = balancers.get(lbPolicies[0]);
    InOrder inOrder = inOrder(lb0, mockHelper);
    Helper helper0 = helpers.get(lb0);
    SubchannelPicker picker = mock(SubchannelPicker.class);
    helper0.updateBalancingState(READY, picker);
    gracefulSwitchLb.switchTo(lbProviders.get(lbPolicies[1]));
    verify(lb0, never()).shutdown();
    LoadBalancer lb1 = balancers.get(lbPolicies[1]);
    Helper helper1 = helpers.get(lb1);
    picker = mock(SubchannelPicker.class);
    helper0.updateBalancingState(CONNECTING, picker);
    verify(mockHelper, never()).updateBalancingState(CONNECTING, picker);
    inOrder.verify(mockHelper).updateBalancingState(CONNECTING, BUFFER_PICKER);
    // shutdown after update
    inOrder.verify(lb0).shutdown();
    picker = mock(SubchannelPicker.class);
    helper1.updateBalancingState(CONNECTING, picker);
    inOrder.verify(mockHelper).updateBalancingState(CONNECTING, picker);
    inOrder.verifyNoMoreInteractions();
    verifyNoMoreInteractions(lb1);
}

Example 7 with LoadBalancer

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

the class PriorityLoadBalancerTest method handleResolvedAddresses.

@Test
public void handleResolvedAddresses() {
    SocketAddress socketAddress = new InetSocketAddress(8080);
    EquivalentAddressGroup eag = new EquivalentAddressGroup(socketAddress);
    eag = AddressFilter.setPathFilter(eag, ImmutableList.of("p1"));
    List<EquivalentAddressGroup> addresses = ImmutableList.of(eag);
    Attributes attributes = Attributes.newBuilder().set(Attributes.Key.create("fakeKey"), "fakeValue").build();
    Object fooConfig0 = new Object();
    PriorityChildConfig priorityChildConfig0 = new PriorityChildConfig(new PolicySelection(fooLbProvider, fooConfig0), true);
    Object barConfig0 = new Object();
    PriorityChildConfig priorityChildConfig1 = new PriorityChildConfig(new PolicySelection(barLbProvider, barConfig0), true);
    Object fooConfig1 = new Object();
    PriorityChildConfig priorityChildConfig2 = new PriorityChildConfig(new PolicySelection(fooLbProvider, fooConfig1), true);
    PriorityLbConfig priorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p0", priorityChildConfig0, "p1", priorityChildConfig1, "p2", priorityChildConfig2), ImmutableList.of("p0", "p1", "p2"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(addresses).setAttributes(attributes).setLoadBalancingPolicyConfig(priorityLbConfig).build());
    assertThat(fooBalancers).hasSize(1);
    assertThat(barBalancers).isEmpty();
    LoadBalancer fooBalancer0 = Iterables.getOnlyElement(fooBalancers);
    verify(fooBalancer0).handleResolvedAddresses(resolvedAddressesCaptor.capture());
    ResolvedAddresses addressesReceived = resolvedAddressesCaptor.getValue();
    assertThat(addressesReceived.getAddresses()).isEmpty();
    assertThat(addressesReceived.getAttributes()).isEqualTo(attributes);
    assertThat(addressesReceived.getLoadBalancingPolicyConfig()).isEqualTo(fooConfig0);
    // Fail over to p1.
    fakeClock.forwardTime(10, TimeUnit.SECONDS);
    assertThat(fooBalancers).hasSize(1);
    assertThat(barBalancers).hasSize(1);
    LoadBalancer barBalancer0 = Iterables.getOnlyElement(barBalancers);
    verify(barBalancer0).handleResolvedAddresses(resolvedAddressesCaptor.capture());
    addressesReceived = resolvedAddressesCaptor.getValue();
    assertThat(Iterables.getOnlyElement(addressesReceived.getAddresses()).getAddresses()).containsExactly(socketAddress);
    assertThat(addressesReceived.getAttributes()).isEqualTo(attributes);
    assertThat(addressesReceived.getLoadBalancingPolicyConfig()).isEqualTo(barConfig0);
    // Fail over to p2.
    fakeClock.forwardTime(10, TimeUnit.SECONDS);
    assertThat(fooBalancers).hasSize(2);
    assertThat(barBalancers).hasSize(1);
    LoadBalancer fooBalancer1 = Iterables.getLast(fooBalancers);
    verify(fooBalancer1).handleResolvedAddresses(resolvedAddressesCaptor.capture());
    addressesReceived = resolvedAddressesCaptor.getValue();
    assertThat(addressesReceived.getAddresses()).isEmpty();
    assertThat(addressesReceived.getAttributes()).isEqualTo(attributes);
    assertThat(addressesReceived.getLoadBalancingPolicyConfig()).isEqualTo(fooConfig1);
    // New update: p0 and p2 deleted; p1 config changed.
    SocketAddress newSocketAddress = new InetSocketAddress(8081);
    EquivalentAddressGroup newEag = new EquivalentAddressGroup(newSocketAddress);
    newEag = AddressFilter.setPathFilter(newEag, ImmutableList.of("p1"));
    List<EquivalentAddressGroup> newAddresses = ImmutableList.of(newEag);
    Object newBarConfig = new Object();
    PriorityLbConfig newPriorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p1", new PriorityChildConfig(new PolicySelection(barLbProvider, newBarConfig), true)), ImmutableList.of("p1"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(newAddresses).setLoadBalancingPolicyConfig(newPriorityLbConfig).build());
    assertThat(fooBalancers).hasSize(2);
    assertThat(barBalancers).hasSize(1);
    verify(barBalancer0, times(2)).handleResolvedAddresses(resolvedAddressesCaptor.capture());
    addressesReceived = resolvedAddressesCaptor.getValue();
    assertThat(Iterables.getOnlyElement(addressesReceived.getAddresses()).getAddresses()).containsExactly(newSocketAddress);
    assertThat(addressesReceived.getAttributes()).isEqualTo(Attributes.EMPTY);
    assertThat(addressesReceived.getLoadBalancingPolicyConfig()).isEqualTo(newBarConfig);
    verify(fooBalancer0, never()).shutdown();
    verify(fooBalancer1, never()).shutdown();
    fakeClock.forwardTime(15, TimeUnit.MINUTES);
    verify(fooBalancer0).shutdown();
    verify(fooBalancer1).shutdown();
    verify(barBalancer0, never()).shutdown();
}

Example 8 with LoadBalancer

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

the class PriorityLoadBalancerTest method handleNameResolutionError.

@Test
public void handleNameResolutionError() {
    Object fooConfig0 = new Object();
    PriorityChildConfig priorityChildConfig0 = new PriorityChildConfig(new PolicySelection(fooLbProvider, fooConfig0), true);
    Object fooConfig1 = new Object();
    PriorityChildConfig priorityChildConfig1 = new PriorityChildConfig(new PolicySelection(fooLbProvider, fooConfig1), true);
    PriorityLbConfig priorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p0", priorityChildConfig0), ImmutableList.of("p0"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(ImmutableList.<EquivalentAddressGroup>of()).setLoadBalancingPolicyConfig(priorityLbConfig).build());
    LoadBalancer fooLb0 = Iterables.getOnlyElement(fooBalancers);
    Status status = Status.DATA_LOSS.withDescription("fake error");
    priorityLb.handleNameResolutionError(status);
    verify(fooLb0).handleNameResolutionError(status);
    priorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p1", priorityChildConfig1), ImmutableList.of("p1"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(ImmutableList.<EquivalentAddressGroup>of()).setLoadBalancingPolicyConfig(priorityLbConfig).build());
    assertThat(fooBalancers).hasSize(2);
    LoadBalancer fooLb1 = Iterables.getLast(fooBalancers);
    status = Status.UNAVAILABLE.withDescription("fake error");
    priorityLb.handleNameResolutionError(status);
    // fooLb0 is deactivated but not yet deleted. However, because it is delisted by the latest
    // address update, name resolution error will not be propagated to it.
    verify(fooLb0, never()).shutdown();
    verify(fooLb0, never()).handleNameResolutionError(status);
    verify(fooLb1).handleNameResolutionError(status);
}

Example 9 with LoadBalancer

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

the class PriorityLoadBalancerTest method typicalPriorityFailOverFlow.

@Test
public void typicalPriorityFailOverFlow() {
    PriorityChildConfig priorityChildConfig0 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig1 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig2 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig3 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityLbConfig priorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p0", priorityChildConfig0, "p1", priorityChildConfig1, "p2", priorityChildConfig2, "p3", priorityChildConfig3), ImmutableList.of("p0", "p1", "p2", "p3"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(ImmutableList.<EquivalentAddressGroup>of()).setLoadBalancingPolicyConfig(priorityLbConfig).build());
    assertThat(fooBalancers).hasSize(1);
    assertThat(fooHelpers).hasSize(1);
    LoadBalancer balancer0 = Iterables.getLast(fooBalancers);
    Helper helper0 = Iterables.getOnlyElement(fooHelpers);
    // p0 gets READY.
    final Subchannel subchannel0 = mock(Subchannel.class);
    helper0.updateBalancingState(READY, new SubchannelPicker() {

        @Override
        public PickResult pickSubchannel(PickSubchannelArgs args) {
            return PickResult.withSubchannel(subchannel0);
        }
    });
    assertCurrentPickerPicksSubchannel(subchannel0);
    // p0 fails over to p1 immediately.
    helper0.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.ABORTED));
    assertLatestConnectivityState(CONNECTING);
    assertThat(fooBalancers).hasSize(2);
    assertThat(fooHelpers).hasSize(2);
    LoadBalancer balancer1 = Iterables.getLast(fooBalancers);
    // p1 timeout, and fails over to p2
    fakeClock.forwardTime(10, TimeUnit.SECONDS);
    assertLatestConnectivityState(CONNECTING);
    assertThat(fooBalancers).hasSize(3);
    assertThat(fooHelpers).hasSize(3);
    LoadBalancer balancer2 = Iterables.getLast(fooBalancers);
    Helper helper2 = Iterables.getLast(fooHelpers);
    // p2 gets READY
    final Subchannel subchannel1 = mock(Subchannel.class);
    helper2.updateBalancingState(READY, new SubchannelPicker() {

        @Override
        public PickResult pickSubchannel(PickSubchannelArgs args) {
            return PickResult.withSubchannel(subchannel1);
        }
    });
    assertCurrentPickerPicksSubchannel(subchannel1);
    // p0 gets back to READY
    final Subchannel subchannel2 = mock(Subchannel.class);
    helper0.updateBalancingState(READY, new SubchannelPicker() {

        @Override
        public PickResult pickSubchannel(PickSubchannelArgs args) {
            return PickResult.withSubchannel(subchannel2);
        }
    });
    assertCurrentPickerPicksSubchannel(subchannel2);
    // p2 fails but does not affect overall picker
    helper2.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.UNAVAILABLE));
    assertCurrentPickerPicksSubchannel(subchannel2);
    // p0 fails over to p3 immediately since p1 already timeout and p2 already in TRANSIENT_FAILURE.
    helper0.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.UNAVAILABLE));
    assertLatestConnectivityState(CONNECTING);
    assertThat(fooBalancers).hasSize(4);
    assertThat(fooHelpers).hasSize(4);
    LoadBalancer balancer3 = Iterables.getLast(fooBalancers);
    Helper helper3 = Iterables.getLast(fooHelpers);
    // p3 timeout then the channel should go to TRANSIENT_FAILURE
    fakeClock.forwardTime(10, TimeUnit.SECONDS);
    assertCurrentPickerReturnsError(Status.Code.UNAVAILABLE, "timeout");
    // p3 fails then the picker should have error status updated
    helper3.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.DATA_LOSS.withDescription("foo")));
    assertCurrentPickerReturnsError(Status.Code.DATA_LOSS, "foo");
    // p2 gets back to READY
    final Subchannel subchannel3 = mock(Subchannel.class);
    helper2.updateBalancingState(READY, new SubchannelPicker() {

        @Override
        public PickResult pickSubchannel(PickSubchannelArgs args) {
            return PickResult.withSubchannel(subchannel3);
        }
    });
    assertCurrentPickerPicksSubchannel(subchannel3);
    // p0 gets back to READY
    final Subchannel subchannel4 = mock(Subchannel.class);
    helper0.updateBalancingState(READY, new SubchannelPicker() {

        @Override
        public PickResult pickSubchannel(PickSubchannelArgs args) {
            return PickResult.withSubchannel(subchannel4);
        }
    });
    assertCurrentPickerPicksSubchannel(subchannel4);
    // p0 fails over to p2 and picker is updated to p2's existing picker.
    helper0.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.UNAVAILABLE));
    assertCurrentPickerPicksSubchannel(subchannel3);
    // Deactivate child balancer get deleted.
    fakeClock.forwardTime(15, TimeUnit.MINUTES);
    verify(balancer0, never()).shutdown();
    verify(balancer1, never()).shutdown();
    verify(balancer2, never()).shutdown();
    verify(balancer3).shutdown();
}

Example 10 with LoadBalancer

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

the class PriorityLoadBalancerTest method typicalPriorityFailOverFlowWithIdleUpdate.

@Test
public void typicalPriorityFailOverFlowWithIdleUpdate() {
    PriorityChildConfig priorityChildConfig0 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig1 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig2 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityChildConfig priorityChildConfig3 = new PriorityChildConfig(new PolicySelection(fooLbProvider, new Object()), true);
    PriorityLbConfig priorityLbConfig = new PriorityLbConfig(ImmutableMap.of("p0", priorityChildConfig0, "p1", priorityChildConfig1, "p2", priorityChildConfig2, "p3", priorityChildConfig3), ImmutableList.of("p0", "p1", "p2", "p3"));
    priorityLb.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(ImmutableList.<EquivalentAddressGroup>of()).setLoadBalancingPolicyConfig(priorityLbConfig).build());
    assertThat(fooBalancers).hasSize(1);
    assertThat(fooHelpers).hasSize(1);
    LoadBalancer balancer0 = Iterables.getLast(fooBalancers);
    Helper helper0 = Iterables.getOnlyElement(fooHelpers);
    // p0 gets IDLE.
    helper0.updateBalancingState(IDLE, BUFFER_PICKER);
    assertCurrentPickerIsBufferPicker();
    // p0 fails over to p1 immediately.
    helper0.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.ABORTED));
    assertLatestConnectivityState(CONNECTING);
    assertThat(fooBalancers).hasSize(2);
    assertThat(fooHelpers).hasSize(2);
    LoadBalancer balancer1 = Iterables.getLast(fooBalancers);
    // p1 timeout, and fails over to p2
    fakeClock.forwardTime(10, TimeUnit.SECONDS);
    assertLatestConnectivityState(CONNECTING);
    assertThat(fooBalancers).hasSize(3);
    assertThat(fooHelpers).hasSize(3);
    LoadBalancer balancer2 = Iterables.getLast(fooBalancers);
    Helper helper2 = Iterables.getLast(fooHelpers);
    // p2 gets IDLE
    helper2.updateBalancingState(IDLE, BUFFER_PICKER);
    assertCurrentPickerIsBufferPicker();
    // p0 gets back to IDLE
    helper0.updateBalancingState(IDLE, BUFFER_PICKER);
    assertCurrentPickerIsBufferPicker();
    // p2 fails but does not affect overall picker
    helper2.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.UNAVAILABLE));
    assertCurrentPickerIsBufferPicker();
    // p0 fails over to p3 immediately since p1 already timeout and p2 already in TRANSIENT_FAILURE.
    helper0.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.UNAVAILABLE));
    assertLatestConnectivityState(CONNECTING);
    assertThat(fooBalancers).hasSize(4);
    assertThat(fooHelpers).hasSize(4);
    LoadBalancer balancer3 = Iterables.getLast(fooBalancers);
    Helper helper3 = Iterables.getLast(fooHelpers);
    // p3 timeout then the channel should go to TRANSIENT_FAILURE
    fakeClock.forwardTime(10, TimeUnit.SECONDS);
    assertCurrentPickerReturnsError(Status.Code.UNAVAILABLE, "timeout");
    // p3 fails then the picker should have error status updated
    helper3.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.DATA_LOSS.withDescription("foo")));
    assertCurrentPickerReturnsError(Status.Code.DATA_LOSS, "foo");
    // p2 gets back to IDLE
    helper2.updateBalancingState(IDLE, BUFFER_PICKER);
    assertCurrentPickerIsBufferPicker();
    // p0 gets back to IDLE
    helper0.updateBalancingState(IDLE, BUFFER_PICKER);
    assertCurrentPickerIsBufferPicker();
    // p0 fails over to p2 and picker is updated to p2's existing picker.
    helper0.updateBalancingState(TRANSIENT_FAILURE, new ErrorPicker(Status.UNAVAILABLE));
    assertCurrentPickerIsBufferPicker();
    // Deactivate child balancer get deleted.
    fakeClock.forwardTime(15, TimeUnit.MINUTES);
    verify(balancer0, never()).shutdown();
    verify(balancer1, never()).shutdown();
    verify(balancer2, never()).shutdown();
    verify(balancer3).shutdown();
}