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

    {
      manager = HelixManagerFactory.getZKHelixManager(CLUSTER_NAME,
                                                          "localhost_" + (START_PORT + 3),
                                                          InstanceType.PARTICIPANT,
                                                          ZK_ADDR);
      manager.connect();
      Assert.fail("Should fail on connect() since cluster structure is not set up");
    }
    catch(HelixException e)
    {
      // OK

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    {
      manager = HelixManagerFactory.getZKHelixManager(CLUSTER_NAME,
                                                          "localhost_" + (START_PORT + 1),
                                                          InstanceType.PARTICIPANT,
                                                          ZK_ADDR);
      manager.connect();
      Assert.fail("Should fail on connect() since cluster structure is not set up");
    }
    catch(HelixException e)
    {
      // OK

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    {
      manager = HelixManagerFactory.getZKHelixManager(CLUSTER_NAME,
                                                          "localhost_" + (START_PORT + 1),
                                                          InstanceType.PARTICIPANT,
                                                          ZK_ADDR);
      manager.connect();
      Assert.fail("Should fail on connect() since cluster structure is not set up");
    }
    catch(HelixException e)
    {
      // OK

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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,
            ZK_ADDR);
    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, ZK_ADDR);
    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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        rec.setSimpleField("SERVICE_NAME", serviceMetadata.getServiceName());
        return rec;
      }
    };
    helixManager.setLiveInstanceInfoProvider(liveInstanceInfoProvider);
    helixManager.connect();
    serviceMap.put(serviceId, helixManager);
    refreshCache();
    return true;
  }

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    stateMach.registerStateModelFactory(stateModelName, new AgentStateModelFactory());


    Runtime.getRuntime().addShutdownHook(new HelixAgentShutdownHook(manager));


    try {
      manager.connect();
      Thread.currentThread().join();
    } catch (Exception e) {
      LOG.error(e);
    } finally {
      if (manager != null && manager.isConnected()) {

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      StateMachineEngine stateMach = manager.getStateMachineEngine();
      DummyMSModelFactory msModelFactory = new DummyMSModelFactory();
      stateMach.registerStateModelFactory("MasterSlave", msModelFactory);


      manager.connect();


      Thread.currentThread().join();
    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();

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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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        // StateMachineEngine();
        StateMachineEngine stateMach = manager.getStateMachineEngine();
        stateMach.registerStateModelFactory("LeaderStandby", stateModelFactory);
        // manager.getMessagingService().registerMessageHandlerFactory(MessageType.STATE_TRANSITION.toString(),
        // genericStateMachineHandler);
        manager.connect();
      } else {
        logger.error("cluster controller mode:" + controllerMode + " NOT supported");
        // throw new
        // IllegalArgumentException("Unsupported cluster controller mode:" +
        // controllerMode);

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