Examples with ElectionContext org.neo4j.cluster.protocol.election.ElectionContext used on opensource projects

Example 1 with ElectionContext

use of org.neo4j.cluster.protocol.election.ElectionContext in project neo4j by neo4j.

the class ClusterContextTest method testElectionVersionIsResetWhenElectorChangesFromMeToOther.

@Test
public void testElectionVersionIsResetWhenElectorChangesFromMeToOther() 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();
    ElectionContext electionContext = multiPaxosContext.getElectionContext();
    ClusterListener listener = mock(ClusterListener.class);
    context.setLastElectorVersion(5);
    context.setLastElector(me);
    context.addClusterListener(listener);
    long expectedVersion = electionContext.newConfigurationStateChange().getVersion();
    context.elected(coordinatorRole, winner, me, expectedVersion);
    verify(listener, times(1)).elected(coordinatorRole, winner, null);
    context.elected(coordinatorRole, winner, elector, 2);
    verify(listener, times(2)).elected(coordinatorRole, winner, null);
    context.elected(coordinatorRole, winner, elector, 3);
    verify(listener, times(3)).elected(coordinatorRole, winner, null);
    context.elected(coordinatorRole, winner, elector, 2);
    verifyNoMoreInteractions(listener);
}

Example 2 with ElectionContext

use of org.neo4j.cluster.protocol.election.ElectionContext in project neo4j by neo4j.

the class ClusterContextTest method testElectionVersionIsResetWhenElectorChangesFromOtherToMe.

@Test
public void testElectionVersionIsResetWhenElectorChangesFromOtherToMe() 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.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.setLastElectorVersion(5);
    context.setLastElector(elector);
    context.addClusterListener(listener);
    context.elected(coordinatorRole, winner, elector, 6);
    verify(listener, times(1)).elected(coordinatorRole, winner, null);
    electionContext.forgetElection(coordinatorRole);
    long expectedVersion = electionContext.newConfigurationStateChange().getVersion();
    context.elected(coordinatorRole, winner, me, expectedVersion);
    verify(listener, times(2)).elected(coordinatorRole, winner, null);
}

Example 3 with ElectionContext

use of org.neo4j.cluster.protocol.election.ElectionContext 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);
}