Examples with MultiPaxosContext org.neo4j.cluster.protocol.atomicbroadcast.multipaxos.context.MultiPaxosContext used on opensource projects

Example 21 with MultiPaxosContext

use of org.neo4j.cluster.protocol.atomicbroadcast.multipaxos.context.MultiPaxosContext in project neo4j by neo4j.

the class ClusterContextTest method testElectionVersionIsUpdatedOnElectionFromSelfAndProperlyIgnoredIfOld.

@Test
public void testElectionVersionIsUpdatedOnElectionFromSelfAndProperlyIgnoredIfOld() throws Exception {
    final String coordinatorRole = "coordinator";
    final InstanceId me = new InstanceId(1);
    final InstanceId winner = new InstanceId(2);
    HeartbeatContext heartbeatContext = mock(HeartbeatContext.class);
    when(heartbeatContext.getFailed()).thenReturn(Collections.<InstanceId>emptySet());
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    MultiPaxosContext multiPaxosContext = new MultiPaxosContext(me, Iterables.<ElectionRole, ElectionRole>iterable(new ElectionRole(coordinatorRole)), mock(ClusterConfiguration.class), new Executor() {

        @Override
        public void execute(Runnable command) {
            command.run();
        }
    }, NullLogProvider.getInstance(), mock(ObjectInputStreamFactory.class), mock(ObjectOutputStreamFactory.class), mock(AcceptorInstanceStore.class), mock(Timeouts.class), mock(ElectionCredentialsProvider.class), config);
    ClusterContext context = multiPaxosContext.getClusterContext();
    ElectionContext electionContext = multiPaxosContext.getElectionContext();
    ClusterListener listener = mock(ClusterListener.class);
    context.addClusterListener(listener);
    electionContext.forgetElection(coordinatorRole);
    long expectedVersion = electionContext.newConfigurationStateChange().getVersion();
    context.elected(coordinatorRole, winner, me, expectedVersion);
    assertEquals(1, expectedVersion);
    verify(listener, times(1)).elected(coordinatorRole, winner, null);
    electionContext.forgetElection(coordinatorRole);
    expectedVersion = electionContext.newConfigurationStateChange().getVersion();
    context.elected(coordinatorRole, winner, me, expectedVersion);
    assertEquals(2, expectedVersion);
    verify(listener, times(2)).elected(coordinatorRole, winner, null);
    context.elected(coordinatorRole, winner, me, expectedVersion - 1);
    verifyNoMoreInteractions(listener);
}

Example 22 with MultiPaxosContext

use of org.neo4j.cluster.protocol.atomicbroadcast.multipaxos.context.MultiPaxosContext in project neo4j by neo4j.

the class ClusterContextTest method testElectionVersionIsUpdatedOnElectionFromOtherAndIgnoredIfOld.

@Test
public void testElectionVersionIsUpdatedOnElectionFromOtherAndIgnoredIfOld() throws Exception {
    final String coordinatorRole = "coordinator";
    final InstanceId me = new InstanceId(1);
    final InstanceId winner = new InstanceId(2);
    final InstanceId elector = new InstanceId(2);
    HeartbeatContext heartbeatContext = mock(HeartbeatContext.class);
    when(heartbeatContext.getFailed()).thenReturn(Collections.<InstanceId>emptySet());
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    MultiPaxosContext multiPaxosContext = new MultiPaxosContext(me, Iterables.<ElectionRole, ElectionRole>iterable(new ElectionRole(coordinatorRole)), mock(ClusterConfiguration.class), new Executor() {

        @Override
        public void execute(Runnable command) {
            command.run();
        }
    }, NullLogProvider.getInstance(), mock(ObjectInputStreamFactory.class), mock(ObjectOutputStreamFactory.class), mock(AcceptorInstanceStore.class), mock(Timeouts.class), mock(ElectionCredentialsProvider.class), config);
    ClusterContext context = multiPaxosContext.getClusterContext();
    ClusterListener listener = mock(ClusterListener.class);
    context.addClusterListener(listener);
    context.elected(coordinatorRole, winner, elector, 2);
    verify(listener, times(1)).elected(coordinatorRole, winner, null);
    context.elected(coordinatorRole, winner, elector, 3);
    verify(listener, times(2)).elected(coordinatorRole, winner, null);
    context.elected(coordinatorRole, winner, elector, 2);
    verifyNoMoreInteractions(listener);
}

Example 23 with MultiPaxosContext

use of org.neo4j.cluster.protocol.atomicbroadcast.multipaxos.context.MultiPaxosContext in project neo4j by neo4j.

the class HeartbeatStateTest method shouldAddInstanceIdHeaderInCatchUpMessages.

@Test
public void shouldAddInstanceIdHeaderInCatchUpMessages() throws Throwable {
    // Given
    InstanceId instanceId = new InstanceId(1);
    HeartbeatState heartbeat = HeartbeatState.heartbeat;
    ClusterConfiguration configuration = new ClusterConfiguration("whatever", NullLogProvider.getInstance(), "cluster://1", "cluster://2");
    configuration.joined(instanceId, URI.create("cluster://1"));
    InstanceId otherInstance = new InstanceId(2);
    configuration.joined(otherInstance, URI.create("cluster://2"));
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    MultiPaxosContext context = new MultiPaxosContext(instanceId, iterable(new ElectionRole("coordinator")), configuration, Mockito.mock(Executor.class), NullLogProvider.getInstance(), Mockito.mock(ObjectInputStreamFactory.class), Mockito.mock(ObjectOutputStreamFactory.class), Mockito.mock(AcceptorInstanceStore.class), Mockito.mock(Timeouts.class), mock(ElectionCredentialsProvider.class), config);
    int lastDeliveredInstanceId = 100;
    context.getLearnerContext().setLastDeliveredInstanceId(lastDeliveredInstanceId);
    // This gap will trigger the catchUp message that we'll test against
    lastDeliveredInstanceId += 20;
    HeartbeatContext heartbeatContext = context.getHeartbeatContext();
    Message received = Message.internal(HeartbeatMessage.i_am_alive, new HeartbeatMessage.IAmAliveState(otherInstance));
    received.setHeader(Message.FROM, "cluster://2").setHeader(Message.INSTANCE_ID, "2").setHeader("last-learned", Integer.toString(lastDeliveredInstanceId));
    // When
    MessageHolder holder = mock(MessageHolder.class);
    heartbeat.handle(heartbeatContext, received, holder);
    // Then
    verify(holder, times(1)).offer(Matchers.argThat(new MessageArgumentMatcher<LearnerMessage>().onMessageType(LearnerMessage.catchUp).withHeader(Message.INSTANCE_ID, "2")));
}

Example 24 with MultiPaxosContext

use of org.neo4j.cluster.protocol.atomicbroadcast.multipaxos.context.MultiPaxosContext in project neo4j by neo4j.

the class LearnerContextTest method shouldOnlyAllowHigherLastLearnedInstanceId.

@Test
public void shouldOnlyAllowHigherLastLearnedInstanceId() throws Exception {
    // Given
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    MultiPaxosContext mpCtx = new MultiPaxosContext(null, Iterables.<ElectionRole>empty(), mock(ClusterConfiguration.class), null, NullLogProvider.getInstance(), null, null, null, null, null, config);
    LearnerContext state = mpCtx.getLearnerContext();
    // When
    state.setLastKnownLearnedInstanceInCluster(1, new InstanceId(2));
    state.setLastKnownLearnedInstanceInCluster(0, new InstanceId(3));
    // Then
    assertThat(state.getLastKnownLearnedInstanceInCluster(), equalTo(1L));
}

Example 25 with MultiPaxosContext

use of org.neo4j.cluster.protocol.atomicbroadcast.multipaxos.context.MultiPaxosContext in project neo4j by neo4j.

the class LearnerContextTest method settingLastLearnedInstanceToNegativeOneShouldAlwaysWin.

@Test
public void settingLastLearnedInstanceToNegativeOneShouldAlwaysWin() throws Exception {
    // Given
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    MultiPaxosContext mpCtx = new MultiPaxosContext(null, Iterables.<ElectionRole>empty(), mock(ClusterConfiguration.class), null, NullLogProvider.getInstance(), null, null, null, null, null, config);
    LearnerContext state = mpCtx.getLearnerContext();
    // When
    state.setLastKnownLearnedInstanceInCluster(1, new InstanceId(2));
    state.setLastKnownLearnedInstanceInCluster(-1, null);
    // Then
    assertThat(state.getLastKnownLearnedInstanceInCluster(), equalTo(-1L));
    assertThat(state.getLastKnownAliveUpToDateInstance(), equalTo(new org.neo4j.cluster.InstanceId(2)));
}