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

Example 41 with Subchannel

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

the class CachedSubchannelPoolTest method subchannelReused.

@Test
public void subchannelReused() {
    Subchannel subchannel1 = pool.takeOrCreateSubchannel(EAG1, ATTRS1);
    assertThat(subchannel1).isNotNull();
    InOrder inOrder = Mockito.inOrder(helper);
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    CreateSubchannelArgs createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(EAG1);
    assertThat(createSubchannelArgs.getAttributes()).isEqualTo(ATTRS1);
    Subchannel subchannel2 = pool.takeOrCreateSubchannel(EAG2, ATTRS2);
    assertThat(subchannel2).isNotNull();
    assertThat(subchannel2).isNotSameInstanceAs(subchannel1);
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(EAG2);
    assertThat(createSubchannelArgs.getAttributes()).isEqualTo(ATTRS2);
    pool.returnSubchannel(subchannel1, READY_STATE);
    // subchannel1 is 1ms away from expiration.
    clock.forwardTime(SHUTDOWN_TIMEOUT_MS - 1, MILLISECONDS);
    // This will cancel the shutdown timer for subchannel1
    Subchannel subchannel1a = pool.takeOrCreateSubchannel(EAG1, ATTRS1);
    assertThat(subchannel1a).isSameInstanceAs(subchannel1);
    pool.returnSubchannel(subchannel2, READY_STATE);
    // subchannel2 expires SHUTDOWN_TIMEOUT_MS after being returned
    clock.forwardTime(SHUTDOWN_TIMEOUT_MS - 1, MILLISECONDS);
    verify(subchannel2, never()).shutdown();
    clock.forwardTime(1, MILLISECONDS);
    verify(subchannel2).shutdown();
    // pool will create a new channel for EAG2 when requested
    Subchannel subchannel2a = pool.takeOrCreateSubchannel(EAG2, ATTRS2);
    assertThat(subchannel2a).isNotSameInstanceAs(subchannel2);
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(EAG2);
    assertThat(createSubchannelArgs.getAttributes()).isEqualTo(ATTRS2);
    // subchannel1 expires SHUTDOWN_TIMEOUT_MS after being returned
    pool.returnSubchannel(subchannel1a, READY_STATE);
    clock.forwardTime(SHUTDOWN_TIMEOUT_MS - 1, MILLISECONDS);
    verify(subchannel1a, never()).shutdown();
    clock.forwardTime(1, MILLISECONDS);
    verify(subchannel1a).shutdown();
    assertThat(clock.numPendingTasks()).isEqualTo(0);
}

Example 42 with Subchannel

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

the class CachedSubchannelPoolTest method clear.

@Test
public void clear() {
    Subchannel subchannel1 = pool.takeOrCreateSubchannel(EAG1, ATTRS1);
    Subchannel subchannel2 = pool.takeOrCreateSubchannel(EAG2, ATTRS2);
    Subchannel subchannel3 = pool.takeOrCreateSubchannel(EAG2, ATTRS2);
    pool.returnSubchannel(subchannel1, READY_STATE);
    pool.returnSubchannel(subchannel2, READY_STATE);
    verify(subchannel1, never()).shutdown();
    verify(subchannel2, never()).shutdown();
    pool.clear();
    verify(subchannel1).shutdown();
    verify(subchannel2).shutdown();
    verify(subchannel3, never()).shutdown();
    assertThat(clock.numPendingTasks()).isEqualTo(0);
}

Example 43 with Subchannel

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

the class CachedSubchannelPoolTest method subchannelExpireAfterReturned.

@Test
public void subchannelExpireAfterReturned() {
    Subchannel subchannel1 = pool.takeOrCreateSubchannel(EAG1, ATTRS1);
    assertThat(subchannel1).isNotNull();
    InOrder inOrder = Mockito.inOrder(helper);
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    CreateSubchannelArgs createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(EAG1);
    assertThat(createSubchannelArgs.getAttributes()).isEqualTo(ATTRS1);
    Subchannel subchannel2 = pool.takeOrCreateSubchannel(EAG2, ATTRS2);
    assertThat(subchannel2).isNotNull();
    assertThat(subchannel2).isNotSameInstanceAs(subchannel1);
    inOrder.verify(helper).createSubchannel(createSubchannelArgsCaptor.capture());
    createSubchannelArgs = createSubchannelArgsCaptor.getValue();
    assertThat(createSubchannelArgs.getAddresses()).containsExactly(EAG2);
    assertThat(createSubchannelArgs.getAttributes()).isEqualTo(ATTRS2);
    pool.returnSubchannel(subchannel1, READY_STATE);
    // subchannel1 is 1ms away from expiration.
    clock.forwardTime(SHUTDOWN_TIMEOUT_MS - 1, MILLISECONDS);
    verify(subchannel1, never()).shutdown();
    pool.returnSubchannel(subchannel2, READY_STATE);
    // subchannel1 expires. subchannel2 is (SHUTDOWN_TIMEOUT_MS - 1) away from expiration.
    clock.forwardTime(1, MILLISECONDS);
    verify(subchannel1).shutdown();
    // subchanne2 expires.
    clock.forwardTime(SHUTDOWN_TIMEOUT_MS - 1, MILLISECONDS);
    verify(subchannel2).shutdown();
    assertThat(clock.numPendingTasks()).isEqualTo(0);
}

Example 44 with Subchannel

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

the class CachedSubchannelPoolTest method returnDuplicateAddressSubchannel.

@Test
public void returnDuplicateAddressSubchannel() {
    Subchannel subchannel1 = pool.takeOrCreateSubchannel(EAG1, ATTRS1);
    Subchannel subchannel2 = pool.takeOrCreateSubchannel(EAG1, ATTRS2);
    Subchannel subchannel3 = pool.takeOrCreateSubchannel(EAG2, ATTRS1);
    assertThat(subchannel1).isNotSameInstanceAs(subchannel2);
    assertThat(clock.getPendingTasks(SHUTDOWN_TASK_FILTER)).isEmpty();
    pool.returnSubchannel(subchannel2, READY_STATE);
    assertThat(clock.getPendingTasks(SHUTDOWN_TASK_FILTER)).hasSize(1);
    // If the subchannel being returned has an address that is the same as a subchannel in the pool,
    // the returned subchannel will be shut down.
    verify(subchannel1, never()).shutdown();
    pool.returnSubchannel(subchannel1, READY_STATE);
    assertThat(clock.getPendingTasks(SHUTDOWN_TASK_FILTER)).hasSize(1);
    verify(subchannel1).shutdown();
    pool.returnSubchannel(subchannel3, READY_STATE);
    assertThat(clock.getPendingTasks(SHUTDOWN_TASK_FILTER)).hasSize(2);
    // Returning the same subchannel twice has no effect.
    pool.returnSubchannel(subchannel3, READY_STATE);
    assertThat(clock.getPendingTasks(SHUTDOWN_TASK_FILTER)).hasSize(2);
    verify(subchannel2, never()).shutdown();
    verify(subchannel3, never()).shutdown();
}

Example 45 with Subchannel

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

the class HealthCheckingLoadBalancerFactoryTest method serviceConfigChangesServiceNameWhenRpcActive.

@Test
public void serviceConfigChangesServiceNameWhenRpcActive() {
    Attributes resolutionAttrs = attrsWithHealthCheckService("TeeService");
    ResolvedAddresses result1 = ResolvedAddresses.newBuilder().setAddresses(resolvedAddressList).setAttributes(resolutionAttrs).build();
    hcLbEventDelivery.handleResolvedAddresses(result1);
    verify(origLb).handleResolvedAddresses(result1);
    verifyNoMoreInteractions(origLb);
    Subchannel subchannel = createSubchannel(0, Attributes.EMPTY);
    SubchannelStateListener mockListener = mockStateListeners[0];
    assertThat(unwrap(subchannel)).isSameInstanceAs(subchannels[0]);
    InOrder inOrder = inOrder(origLb, mockListener);
    deliverSubchannelState(0, ConnectivityStateInfo.forNonError(READY));
    inOrder.verify(mockListener).onSubchannelState(eq(ConnectivityStateInfo.forNonError(CONNECTING)));
    HealthImpl healthImpl = healthImpls[0];
    assertThat(healthImpl.calls).hasSize(1);
    ServerSideCall serverCall = healthImpl.calls.poll();
    assertThat(serverCall.cancelled).isFalse();
    assertThat(serverCall.request).isEqualTo(makeRequest("TeeService"));
    // Health check responded
    serverCall.responseObserver.onNext(makeResponse(ServingStatus.SERVING));
    inOrder.verify(mockListener).onSubchannelState(eq(ConnectivityStateInfo.forNonError(READY)));
    // Service config returns with the same health check name.
    hcLbEventDelivery.handleResolvedAddresses(result1);
    // It's delivered to origLb, but nothing else happens
    inOrder.verify(origLb).handleResolvedAddresses(result1);
    verifyNoMoreInteractions(origLb, mockListener);
    // Service config returns a different health check name.
    resolutionAttrs = attrsWithHealthCheckService("FooService");
    ResolvedAddresses result2 = ResolvedAddresses.newBuilder().setAddresses(resolvedAddressList).setAttributes(resolutionAttrs).build();
    hcLbEventDelivery.handleResolvedAddresses(result2);
    inOrder.verify(origLb).handleResolvedAddresses(result2);
    // Current health check RPC cancelled.
    assertThat(serverCall.cancelled).isTrue();
    // A second RPC is started immediately
    assertThat(healthImpl.calls).hasSize(1);
    serverCall = healthImpl.calls.poll();
    // with the new service name
    assertThat(serverCall.request).isEqualTo(makeRequest("FooService"));
    // State stays in READY, instead of switching to CONNECTING.
    verifyNoMoreInteractions(origLb, mockListener);
}