Examples with ClusterConfiguration org.neo4j.cluster.protocol.cluster.ClusterConfiguration used on opensource projects

Example 21 with ClusterConfiguration

use of org.neo4j.cluster.protocol.cluster.ClusterConfiguration in project neo4j by neo4j.

the class MultiPaxosServer method start.

public void start() throws IOException {
    broadcastSerializer = new AtomicBroadcastSerializer(new ObjectStreamFactory(), new ObjectStreamFactory());
    final LifeSupport life = new LifeSupport();
    try {
        MessageTimeoutStrategy timeoutStrategy = new MessageTimeoutStrategy(new FixedTimeoutStrategy(5000)).timeout(HeartbeatMessage.sendHeartbeat, 200);
        Monitors monitors = new Monitors();
        NetworkedServerFactory serverFactory = new NetworkedServerFactory(life, new MultiPaxosServerFactory(new ClusterConfiguration("default", NullLogProvider.getInstance()), NullLogProvider.getInstance(), monitors.newMonitor(StateMachines.Monitor.class)), timeoutStrategy, NullLogProvider.getInstance(), new ObjectStreamFactory(), new ObjectStreamFactory(), monitors.newMonitor(NetworkReceiver.Monitor.class), monitors.newMonitor(NetworkSender.Monitor.class), monitors.newMonitor(NamedThreadFactory.Monitor.class));
        ServerIdElectionCredentialsProvider electionCredentialsProvider = new ServerIdElectionCredentialsProvider();
        server = serverFactory.newNetworkedServer(Config.embeddedDefaults(), new InMemoryAcceptorInstanceStore(), electionCredentialsProvider);
        server.addBindingListener(electionCredentialsProvider);
        server.addBindingListener(new BindingListener() {

            @Override
            public void listeningAt(URI me) {
                System.out.println("Listening at:" + me);
            }
        });
        cluster = server.newClient(Cluster.class);
        cluster.addClusterListener(new ClusterListener() {

            @Override
            public void enteredCluster(ClusterConfiguration clusterConfiguration) {
                System.out.println("Entered cluster:" + clusterConfiguration);
            }

            @Override
            public void joinedCluster(InstanceId instanceId, URI member) {
                System.out.println("Joined cluster:" + instanceId + " (at URI " + member + ")");
            }

            @Override
            public void leftCluster(InstanceId instanceId, URI member) {
                System.out.println("Left cluster:" + instanceId);
            }

            @Override
            public void leftCluster() {
                System.out.println("Left cluster");
            }

            @Override
            public void elected(String role, InstanceId instanceId, URI electedMember) {
                System.out.println(instanceId + " at URI " + electedMember + " was elected as " + role);
            }

            @Override
            public void unelected(String role, InstanceId instanceId, URI electedMember) {
                System.out.println(instanceId + " at URI " + electedMember + " was removed from " + role);
            }
        });
        Heartbeat heartbeat = server.newClient(Heartbeat.class);
        heartbeat.addHeartbeatListener(new HeartbeatListener() {

            @Override
            public void failed(InstanceId server) {
                System.out.println(server + " failed");
            }

            @Override
            public void alive(InstanceId server) {
                System.out.println(server + " alive");
            }
        });
        broadcast = server.newClient(AtomicBroadcast.class);
        broadcast.addAtomicBroadcastListener(new AtomicBroadcastListener() {

            @Override
            public void receive(Payload value) {
                try {
                    System.out.println(broadcastSerializer.receive(value));
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (ClassNotFoundException e) {
                    e.printStackTrace();
                }
            }
        });
        life.start();
        String command;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        while (!(command = reader.readLine()).equals("quit")) {
            String[] arguments = command.split(" ");
            Method method = getCommandMethod(arguments[0]);
            if (method != null) {
                String[] realArgs = new String[arguments.length - 1];
                System.arraycopy(arguments, 1, realArgs, 0, realArgs.length);
                try {
                    method.invoke(this, (Object[]) realArgs);
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }
            }
        }
        cluster.leave();
    } finally {
        life.shutdown();
        System.out.println("Done");
    }
}

Example 22 with ClusterConfiguration

use of org.neo4j.cluster.protocol.cluster.ClusterConfiguration in project neo4j by neo4j.

the class AtomicBroadcastContextImplTest method shouldHasNoQuorumWhenOneMachineAliveInAClusterWithThreeMachines.

@Test
public void shouldHasNoQuorumWhenOneMachineAliveInAClusterWithThreeMachines() {
    //Given
    HeartbeatContext heartbeatContext = mock(HeartbeatContext.class);
    CommonContextState commonState = mock(CommonContextState.class);
    ClusterConfiguration configuration = mock(ClusterConfiguration.class);
    when(heartbeatContext.getAlive()).thenReturn(ids(1));
    when(commonState.configuration()).thenReturn(configuration);
    when(configuration.getMembers()).thenReturn(members(3));
    AtomicBroadcastContextImpl context = new AtomicBroadcastContextImpl(null, commonState, null, null, null, // we do not care about other args
    heartbeatContext);
    //When
    boolean hasQuorum = context.hasQuorum();
    //Then
    assertFalse(hasQuorum);
}

Example 23 with ClusterConfiguration

use of org.neo4j.cluster.protocol.cluster.ClusterConfiguration in project neo4j by neo4j.

the class HeartbeatStateTest method shouldIgnoreSuspicionsForOurselvesButKeepTheRest.

@Test
public void shouldIgnoreSuspicionsForOurselvesButKeepTheRest() throws Throwable {
    // Given
    InstanceId myId = new InstanceId(1);
    InstanceId foreignId = new InstanceId(3);
    HeartbeatState heartbeat = HeartbeatState.heartbeat;
    ClusterConfiguration configuration = new ClusterConfiguration("whatever", NullLogProvider.getInstance(), "cluster://1", "cluster://2");
    configuration.joined(myId, URI.create("cluster://1"));
    configuration.joined(new InstanceId(2), URI.create("cluster://2"));
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    MultiPaxosContext context = new MultiPaxosContext(myId, 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);
    HeartbeatContext heartbeatContext = context.getHeartbeatContext();
    Message received = Message.internal(HeartbeatMessage.suspicions, new HeartbeatMessage.SuspicionsState(asSet(iterable(myId, foreignId))));
    received.setHeader(Message.FROM, "cluster://2").setHeader(Message.INSTANCE_ID, "2");
    // When
    heartbeat.handle(heartbeatContext, received, mock(MessageHolder.class));
    // Then
    assertThat(heartbeatContext.getSuspicionsOf(myId).size(), equalTo(0));
    assertThat(heartbeatContext.getSuspicionsOf(foreignId).size(), equalTo(1));
}

Example 24 with ClusterConfiguration

use of org.neo4j.cluster.protocol.cluster.ClusterConfiguration in project neo4j by neo4j.

the class SnapshotStateTest method baseNoSendTest.

public void baseNoSendTest(Map<InstanceId, URI> extraMembers) throws Throwable {
    URI me = URI.create("cluster://me");
    Map<InstanceId, URI> members = new HashMap<InstanceId, URI>();
    final InstanceId myId = new InstanceId(1);
    members.put(myId, me);
    members.putAll(extraMembers);
    ClusterConfiguration clusterConfiguration = mock(ClusterConfiguration.class);
    when(clusterConfiguration.getMembers()).thenReturn(members);
    when(clusterConfiguration.getElected(ClusterConfiguration.COORDINATOR)).thenReturn(myId);
    when(clusterConfiguration.getUriForId(myId)).thenReturn(me);
    ClusterContext clusterContext = mock(ClusterContext.class);
    when(clusterContext.getConfiguration()).thenReturn(clusterConfiguration);
    when(clusterContext.getMyId()).thenReturn(myId);
    SnapshotContext context = mock(SnapshotContext.class);
    when(context.getClusterContext()).thenReturn(clusterContext);
    when(context.getSnapshotProvider()).thenReturn(mock(SnapshotProvider.class));
    Message<SnapshotMessage> message = Message.to(SnapshotMessage.refreshSnapshot, me);
    MessageHolder outgoing = mock(MessageHolder.class);
    SnapshotState newState = (SnapshotState) SnapshotState.ready.handle(context, message, outgoing);
    assertThat(newState, equalTo(SnapshotState.ready));
    Mockito.verifyZeroInteractions(outgoing);
}

Example 25 with ClusterConfiguration

use of org.neo4j.cluster.protocol.cluster.ClusterConfiguration in project neo4j by neo4j.

the class ElectionContextTest method electorLeavingAndRejoiningWithNoElectionsInBetweenMustStillHaveElectionsGoThrough.

/*
     * This assumes an instance leaves the cluster normally and then rejoins, without any elections in between. The
     * expected result is that it will succeed in sending election results.
     */
@Test
public void electorLeavingAndRejoiningWithNoElectionsInBetweenMustStillHaveElectionsGoThrough() throws Exception {
    // Given
    final String role1 = "coordinator1";
    InstanceId me = new InstanceId(1);
    InstanceId leavingInstance = new InstanceId(2);
    InstanceId forQuorum = new InstanceId(3);
    Config config = mock(Config.class);
    when(config.get(ClusterSettings.max_acceptors)).thenReturn(10);
    ClusterConfiguration clusterConfiguration = mock(ClusterConfiguration.class);
    List<InstanceId> clusterMemberIds = new LinkedList<InstanceId>();
    clusterMemberIds.add(leavingInstance);
    clusterMemberIds.add(me);
    clusterMemberIds.add(forQuorum);
    when(clusterConfiguration.getMemberIds()).thenReturn(clusterMemberIds);
    MultiPaxosContext context = new MultiPaxosContext(me, Iterables.<ElectionRole, ElectionRole>iterable(new ElectionRole(role1)), clusterConfiguration, 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);
    HeartbeatContext heartbeatContext = context.getHeartbeatContext();
    ClusterContext clusterContext = context.getClusterContext();
    clusterContext.setLastElector(leavingInstance);
    clusterContext.setLastElectorVersion(8);
    // When the elector leaves the cluster
    clusterContext.left(leavingInstance);
    // Then the elector is reset to defaults
    assertEquals(clusterContext.getLastElector(), InstanceId.NONE);
    assertEquals(clusterContext.getLastElectorVersion(), ClusterContext.NO_ELECTOR_VERSION);
    // When the elector comes back with an election result
    // We don't need to join, election results do not check for elector membership
    clusterContext.elected(role1, forQuorum, leavingInstance, 9);
    // Then the result is actually respected
    assertEquals(clusterContext.getLastElector(), leavingInstance);
    assertEquals(clusterContext.getLastElectorVersion(), 9);
}