Examples of org.apache.helix.HelixManager.connect()

org.apache.helix.HelixManager.connect()
Start participating in the cluster operations. All listeners will be initialized and will be notified for every cluster state change This method is not re-entrant. One cannot call this method twice. @throws Exception

    }


    // Start the controller
    HelixManager controller =
        HelixManagerFactory.getZKHelixManager(_clusterName, null, InstanceType.CONTROLLER, _zkaddr);
    controller.connect();


    // Disable controller immediately
    _admin.enableCluster(_clusterName, false);


    // This resource only has 1 partition

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    try {
      if (controllerMode.equalsIgnoreCase(STANDALONE)) {
        manager =
            HelixManagerFactory.getZKHelixManager(clusterName, controllerName,
                InstanceType.CONTROLLER, zkConnectString);
        manager.connect();
      } else if (controllerMode.equalsIgnoreCase(DISTRIBUTED)) {
        manager =
            HelixManagerFactory.getZKHelixManager(clusterName, controllerName,
                InstanceType.CONTROLLER_PARTICIPANT, zkConnectString);

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        MultiClusterControllerTransitionHandlerFactory stateModelFactory =
            new MultiClusterControllerTransitionHandlerFactory(zkConnectString);


        StateMachineEngine stateMach = manager.getStateMachineEngine();
        stateMach.registerStateModelFactory(StateModelDefId.LeaderStandby, stateModelFactory);
        manager.connect();
      } else {
        logger.error("cluster controller mode:" + controllerMode + " NOT supported");
      }
    } catch (Exception e) {
      logger.error("Exception while starting controller", e);

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    HelixManager participant =
        HelixManagerFactory.getZKHelixManager(_clusterName, "localhost_12918",
            InstanceType.PARTICIPANT, ZK_ADDR);
    participant.getStateMachineEngine().registerStateModelFactory(
        StateModelDefId.from("OnlineOffline"), new MyStateModelFactory(stateReachedCounts));
    participant.connect();


    Thread.sleep(1000);


    // Ensure that the external view coalesces
    boolean result =

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    HelixManager participant =
        HelixManagerFactory.getZKHelixManager(_clusterName, "localhost_12918",
            InstanceType.PARTICIPANT, ZK_ADDR);
    participant.getStateMachineEngine().registerStateModelFactory(
        StateModelDefId.from("OnlineOffline"), new MyStateModelFactory(stateReachedCounts));
    participant.connect();


    RoutingTableProvider routingTableProvider = new RoutingTableProvider();
    HelixManager spectator =
        HelixManagerFactory.getZKHelixManager(_clusterName, "spectator", InstanceType.SPECTATOR,
            ZK_ADDR);

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    RoutingTableProvider routingTableProvider = new RoutingTableProvider();
    HelixManager spectator =
        HelixManagerFactory.getZKHelixManager(_clusterName, "spectator", InstanceType.SPECTATOR,
            ZK_ADDR);
    spectator.connect();
    spectator.addInstanceConfigChangeListener(routingTableProvider);
    spectator.addExternalViewChangeListener(routingTableProvider);
    Thread.sleep(1000);


    // Now let's stop the ZK server; this should do nothing

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      String zkAddr =
          (String) getContext().getAttributes().get(RestAdminApplication.ZKSERVERADDRESS);
      HelixManager manager =
          HelixManagerFactory.getZKHelixManager(clusterName, null, InstanceType.ADMINISTRATOR,
              zkAddr);
      manager.connect();
      try {
        Workflow workflow = Workflow.parse(yamlPayload);
        TaskDriver driver = new TaskDriver(manager);
        driver.start(workflow);
      } finally {

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  @Test
  public void testSpectator() throws Exception {
    HelixManager relayHelixManager =
        HelixManagerFactory.getZKHelixManager(CLUSTER_NAME, null, InstanceType.SPECTATOR, _zkaddr);


    relayHelixManager.connect();
    relayHelixManager.addExternalViewChangeListener(this);


    _setupTool.addResourceToCluster(CLUSTER_NAME, "NextDB", 64, STATE_MODEL);
    _setupTool.rebalanceStorageCluster(CLUSTER_NAME, "NextDB", 3);

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  public void testDataChange() throws Exception {
    // Create an admin and add LiveInstanceChange listener to it
    HelixManager adminManager =
        HelixManagerFactory.getZKHelixManager(clusterName, null, InstanceType.ADMINISTRATOR,
            _zkaddr);
    adminManager.connect();
    final BlockingQueue<List<LiveInstance>> changeList =
        new LinkedBlockingQueue<List<LiveInstance>>();


    adminManager.addLiveInstanceChangeListener(new LiveInstanceChangeListener() {
      @Override

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    Assert.assertTrue(instances.isEmpty(), "Expecting an empty list of live instance");
    // Join as participant, should trigger a live instance change event
    HelixManager manager =
        HelixManagerFactory.getZKHelixManager(clusterName, "localhost_54321",
            InstanceType.PARTICIPANT, _zkaddr);
    manager.connect();
    instances = changeList.poll(1, TimeUnit.SECONDS);
    Assert.assertNotNull(instances, "Expecting a list of live instance");
    Assert.assertEquals(instances.size(), 1, "Expecting one live instance");
    Assert.assertEquals(instances.get(0).getInstanceName(), manager.getInstanceName());
    // Update data in the live instance node, should trigger another live instance change

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