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

Example 36 with EquivalentAddressGroup

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

the class RingHashLoadBalancerTest method createWeightedServerAddrs.

private static List<EquivalentAddressGroup> createWeightedServerAddrs(long... weights) {
    List<EquivalentAddressGroup> addrs = new ArrayList<>();
    for (int i = 0; i < weights.length; i++) {
        SocketAddress addr = new FakeSocketAddress("server" + i);
        Attributes attr = Attributes.newBuilder().set(InternalXdsAttributes.ATTR_SERVER_WEIGHT, weights[i]).build();
        EquivalentAddressGroup eag = new EquivalentAddressGroup(addr, attr);
        addrs.add(eag);
    }
    return addrs;
}

Example 37 with EquivalentAddressGroup

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

the class RingHashLoadBalancerTest method deterministicPickWithNewHostsAdded.

@Test
public void deterministicPickWithNewHostsAdded() {
    RingHashConfig config = new RingHashConfig(10, 100);
    // server0 and server1
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1, 1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    InOrder inOrder = Mockito.inOrder(helper);
    inOrder.verify(helper, times(2)).createSubchannel(any(CreateSubchannelArgs.class));
    inOrder.verify(helper).updateBalancingState(eq(IDLE), pickerCaptor.capture());
    // Bring all subchannels to READY so that next pick always succeeds.
    for (Subchannel subchannel : subchannels.values()) {
        deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
        inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    }
    // Simulate rpc hash hits one ring entry exactly for server1.
    long rpcHash = hashFunc.hashAsciiString("[FakeSocketAddress-server1]_0");
    PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, rpcHash));
    pickerCaptor.getValue().pickSubchannel(args);
    PickResult result = pickerCaptor.getValue().pickSubchannel(args);
    Subchannel subchannel = result.getSubchannel();
    assertThat(subchannel.getAddresses()).isEqualTo(servers.get(1));
    // server2, server3, server4 added
    servers = createWeightedServerAddrs(1, 1, 1, 1, 1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    inOrder.verify(helper, times(3)).createSubchannel(any(CreateSubchannelArgs.class));
    inOrder.verify(helper).updateBalancingState(eq(READY), pickerCaptor.capture());
    assertThat(pickerCaptor.getValue().pickSubchannel(args).getSubchannel()).isSameInstanceAs(subchannel);
    verifyNoMoreInteractions(helper);
}

Example 38 with EquivalentAddressGroup

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

the class RingHashLoadBalancerTest method allSubchannelsInTransientFailure.

@Test
public void allSubchannelsInTransientFailure() {
    // Map each server address to exactly one ring entry.
    RingHashConfig config = new RingHashConfig(3, 3);
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1, 1, 1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    verify(helper, times(3)).createSubchannel(any(CreateSubchannelArgs.class));
    verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    // Bring all subchannels to TRANSIENT_FAILURE.
    for (Subchannel subchannel : subchannels.values()) {
        deliverSubchannelState(subchannel, ConnectivityStateInfo.forTransientFailure(Status.UNAVAILABLE.withDescription(subchannel.getAddresses().getAddresses() + " unreachable")));
    }
    verify(helper, atLeastOnce()).updateBalancingState(eq(TRANSIENT_FAILURE), pickerCaptor.capture());
    // Picking subchannel triggers connection. RPC hash hits server0.
    PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, hashFunc.hashVoid()));
    PickResult result = pickerCaptor.getValue().pickSubchannel(args);
    assertThat(result.getStatus().isOk()).isFalse();
    assertThat(result.getStatus().getCode()).isEqualTo(Code.UNAVAILABLE);
    assertThat(result.getStatus().getDescription()).isEqualTo("[FakeSocketAddress-server0] unreachable");
}

Example 39 with EquivalentAddressGroup

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

the class RingHashLoadBalancerTest method ignoreShutdownSubchannelStateChange.

@Test
public void ignoreShutdownSubchannelStateChange() {
    RingHashConfig config = new RingHashConfig(10, 100);
    List<EquivalentAddressGroup> servers = createWeightedServerAddrs(1, 1, 1);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    verify(helper, times(3)).createSubchannel(any(CreateSubchannelArgs.class));
    verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    loadBalancer.shutdown();
    for (Subchannel sc : subchannels.values()) {
        verify(sc).shutdown();
        // When the subchannel is being shut down, a SHUTDOWN connectivity state is delivered
        // back to the subchannel state listener.
        deliverSubchannelState(sc, ConnectivityStateInfo.forNonError(SHUTDOWN));
    }
    verifyNoMoreInteractions(helper);
}

Example 40 with EquivalentAddressGroup

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

the class RingHashLoadBalancerTest method hostSelectionProportionalToRepeatedAddressCount.

@Test
public void hostSelectionProportionalToRepeatedAddressCount() {
    RingHashConfig config = new RingHashConfig(10000, 100000);
    // 1:10:100
    List<EquivalentAddressGroup> servers = createRepeatedServerAddrs(1, 10, 100);
    loadBalancer.handleResolvedAddresses(ResolvedAddresses.newBuilder().setAddresses(servers).setLoadBalancingPolicyConfig(config).build());
    verify(helper, times(3)).createSubchannel(any(CreateSubchannelArgs.class));
    verify(helper).updateBalancingState(eq(IDLE), any(SubchannelPicker.class));
    // Bring all subchannels to READY.
    Map<EquivalentAddressGroup, Integer> pickCounts = new HashMap<>();
    for (Subchannel subchannel : subchannels.values()) {
        deliverSubchannelState(subchannel, ConnectivityStateInfo.forNonError(READY));
        pickCounts.put(subchannel.getAddresses(), 0);
    }
    verify(helper, times(3)).updateBalancingState(eq(READY), pickerCaptor.capture());
    SubchannelPicker picker = pickerCaptor.getValue();
    for (int i = 0; i < 10000; i++) {
        long hash = hashFunc.hashInt(i);
        PickSubchannelArgs args = new PickSubchannelArgsImpl(TestMethodDescriptors.voidMethod(), new Metadata(), CallOptions.DEFAULT.withOption(XdsNameResolver.RPC_HASH_KEY, hash));
        Subchannel pickedSubchannel = picker.pickSubchannel(args).getSubchannel();
        EquivalentAddressGroup addr = pickedSubchannel.getAddresses();
        pickCounts.put(addr, pickCounts.get(addr) + 1);
    }
    // Actual distribution: server0 = 104, server1 = 808, server2 = 9088
    double ratio01 = (double) pickCounts.get(servers.get(0)) / pickCounts.get(servers.get(1));
    double ratio12 = (double) pickCounts.get(servers.get(1)) / pickCounts.get(servers.get(11));
    assertThat(ratio01).isWithin(0.03).of((double) 1 / 10);
    assertThat(ratio12).isWithin(0.03).of((double) 10 / 100);
}