Package com.linkedin.helix

Examples of com.linkedin.helix.HelixManager

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   *
   * @param event
   */
  protected synchronized void handleEvent(ClusterEvent event)
  {
    HelixManager manager = event.getAttribute("helixmanager");
    if (manager == null)
    {
      logger.error("No cluster manager in event:" + event.getName());
      return;
    }

    if (!manager.isLeader())
    {
      logger.error("Cluster manager: " + manager.getInstanceName()
          + " is not leader. Pipeline will not be invoked");
      return;
    }

    if (_paused)
    {
      logger.info("Cluster is paused. Ignoring the event:" + event.getName());
      return;
    }

    NotificationContext context = null;
    if (event.getAttribute("changeContext") != null)
    {
      context = (NotificationContext) (event.getAttribute("changeContext"));
    }

    // Initialize _clusterStatusMonitor
    if (context != null)
    {
      if (context.getType() == Type.FINALIZE)
      {
        if (_clusterStatusMonitor != null)
        {
          _clusterStatusMonitor.reset();
          _clusterStatusMonitor = null;
        }
       
        if (_msgQueueMonitor != null)
        {
          _msgQueueMonitor.reset();
          _msgQueueMonitor = null;
        }
       
        stopRebalancingTimer();
        logger.info("Get FINALIZE notification, skip the pipeline. Event :" + event.getName());
        return;
      }
      else
      {
        if (_clusterStatusMonitor == null)
        {
          _clusterStatusMonitor = new ClusterStatusMonitor(manager.getClusterName());
        }
       
        if (_msgQueueMonitor == null)
        {
          _msgQueueMonitor = new HelixMessageQueueMonitor(manager.getClusterName());
        }
       
        event.addAttribute("clusterStatusMonitor", _clusterStatusMonitor);
      }
    }
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  {
    for (LiveInstance instance : liveInstances)
    {
      String instanceName = instance.getId();
      String clientSessionId = instance.getSessionId();
      HelixManager manager = changeContext.getManager();

      // _instanceCurrentStateChangeSubscriptionSessionIds contains all the sessionIds
      // that we've added a currentState listener
      if (!_instanceCurrentStateChangeSubscriptionSessionIds.contains(clientSessionId))
      {
        try
        {
          manager.addCurrentStateChangeListener(this, instanceName, clientSessionId);
          _instanceCurrentStateChangeSubscriptionSessionIds.add(clientSessionId);
          logger.info("Observing client session id: " + clientSessionId);
        }
        catch (Exception e)
        {
          logger.error("Exception adding current state and message listener for instance:"
                           + instanceName,
                       e);
        }
      }

      // _instanceSubscriptionNames contains all the instanceNames that we've added a
      // message listener
      if (!_instanceSubscriptionNames.contains(instanceName))
      {
        try
        {
          logger.info("Adding message listener for " + instanceName);
          manager.addMessageListener(this, instanceName);
          _instanceSubscriptionNames.add(instanceName);
        }
        catch (Exception e)
        {
          logger.error("Exception adding message listener for instance:" + instanceName,
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  @Override
  public void process(ClusterEvent event) throws Exception
  {
    long startTime = System.currentTimeMillis();

    HelixManager manager = event.getAttribute("helixmanager");
    if (manager == null)
    {
      throw new StageException("HelixManager attribute value is null");
    }
    // DataAccessor dataAccessor = manager.getDataAccessor();
    HelixDataAccessor accessor = manager.getHelixDataAccessor();
    _cache.refresh(accessor);

    event.addAttribute("HealthDataCache", _cache);

    long processLatency = System.currentTimeMillis() - startTime;
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  public void process(ClusterEvent event) throws Exception
  {
    long startTime = System.currentTimeMillis();
    logger.info("START TaskAssignmentStage.process()");

    HelixManager manager = event.getAttribute("helixmanager");
    Map<String, Resource> resourceMap =
        event.getAttribute(AttributeName.RESOURCES.toString());
    MessageThrottleStageOutput messageOutput =
        event.getAttribute(AttributeName.MESSAGES_THROTTLE.toString());

    if (manager == null || resourceMap == null || messageOutput == null)
    {
      throw new StageException("Missing attributes in event:" + event
          + ". Requires HelixManager|RESOURCES|MESSAGES_THROTTLE|DataCache");
    }

    HelixDataAccessor dataAccessor = manager.getHelixDataAccessor();
    List<Message> messagesToSend = new ArrayList<Message>();
    for (String resourceName : resourceMap.keySet())
    {
      Resource resource = resourceMap.get(resourceName);
      for (Partition partition : resource.getPartitions())
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    @Transition(from = "OFFLINE", to = "SLAVE")
    public void offlineToSlave(Message message, NotificationContext context)
    {
      System.out
          .println("BootstrapProcess.BootstrapStateModel.offlineToSlave()");
      HelixManager manager = context.getManager();
      ClusterMessagingService messagingService = manager.getMessagingService();
      Message requestBackupUriRequest = new Message(
          MessageType.USER_DEFINE_MSG, UUID.randomUUID().toString());
      requestBackupUriRequest
          .setMsgSubType(BootstrapProcess.REQUEST_BOOTSTRAP_URL);
      requestBackupUriRequest.setMsgState(MessageState.NEW);
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  private static Logger logger = Logger.getLogger(MessageGenerationPhase.class);

  @Override
  public void process(ClusterEvent event) throws Exception
  {
    HelixManager manager = event.getAttribute("helixmanager");
    ClusterDataCache cache = event.getAttribute("ClusterDataCache");
    Map<String, Resource> resourceMap = event.getAttribute(AttributeName.RESOURCES.toString());
    CurrentStateOutput currentStateOutput = event.getAttribute(AttributeName.CURRENT_STATE
        .toString());
    BestPossibleStateOutput bestPossibleStateOutput = event
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    // read the state model def
    // for each resource
    // get the preference list
    // for each instanceName check if its alive then assign a state
    ClusterDataCache cache = event.getAttribute("ClusterDataCache");
    HelixManager manager = event.getAttribute("helixmanager");

    BestPossibleStateOutput output = new BestPossibleStateOutput();

    for (String resourceName : resourceMap.keySet())
    {
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  public void process(ClusterEvent event) throws Exception
  {
    long startTime = System.currentTimeMillis();
    log.info("START ExternalViewComputeStage.process()");

    HelixManager manager = event.getAttribute("helixmanager");
    Map<String, Resource> resourceMap =
        event.getAttribute(AttributeName.RESOURCES.toString());
    ClusterDataCache cache = event.getAttribute("ClusterDataCache");

    if (manager == null || resourceMap == null || cache == null)
    {
      throw new StageException("Missing attributes in event:" + event
          + ". Requires ClusterManager|RESOURCES|DataCache");
    }

    HelixDataAccessor dataAccessor = manager.getHelixDataAccessor();

    CurrentStateOutput currentStateOutput =
        event.getAttribute(AttributeName.CURRENT_STATE.toString());

    List<ExternalView> newExtViews = new ArrayList<ExternalView>();
    List<PropertyKey> keys = new ArrayList<PropertyKey>();
   
    for (String resourceName : resourceMap.keySet())
    {
      ExternalView view = new ExternalView(resourceName);
      view.setBucketSize(currentStateOutput.getBucketSize(resourceName));
     
      Resource resource = resourceMap.get(resourceName);
      for (Partition partition : resource.getPartitions())
      {
        Map<String, String> currentStateMap =
            currentStateOutput.getCurrentStateMap(resourceName, partition);
        if (currentStateMap != null && currentStateMap.size() > 0)
        {
          // Set<String> disabledInstances
          // = cache.getDisabledInstancesForResource(resource.toString());
          for (String instance : currentStateMap.keySet())
          {
            // if (!disabledInstances.contains(instance))
            // {
            view.setState(partition.getPartitionName(),
                          instance,
                          currentStateMap.get(instance));
            // }
          }
        }
      }
      // Update cluster status monitor mbean
      ClusterStatusMonitor clusterStatusMonitor =
          (ClusterStatusMonitor) event.getAttribute("clusterStatusMonitor");
      if (clusterStatusMonitor != null)
      {
        clusterStatusMonitor.onExternalViewChange(view,
                                                  cache._idealStateMap.get(view.getResourceName()));
      }
     
      // compare the new external view with current one, set only on different
      Map<String, ExternalView> curExtViews =
          dataAccessor.getChildValuesMap(manager.getHelixDataAccessor()
                                             .keyBuilder()
                                             .externalViews());

      ExternalView curExtView = curExtViews.get(resourceName);
      if (curExtView == null || !curExtView.getRecord().equals(view.getRecord()))
      {
        keys.add(manager.getHelixDataAccessor().keyBuilder().externalView(resourceName));
        newExtViews.add(view);
        // dataAccessor.setProperty(PropertyType.EXTERNALVIEW, view,
        // resourceName);
      }
    }
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    String zkAddr = args[0];
    String clusterName = args[1];
    String instanceName = args[2];

    HelixManager manager = null;
    try
    {
      manager = HelixManagerFactory.getZKHelixManager(clusterName, instanceName,
          InstanceType.PARTICIPANT, zkAddr);

      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();
    } finally
    {
      if (manager != null)
      {
        manager.disconnect();
      }
    }
  }
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    final String clusterName = SetupConsumerCluster.DEFAULT_CLUSTER_NAME;
    final String zkAddr = args[0];
   
    try
    {
      final HelixManager manager = HelixControllerMain.startHelixController(zkAddr, clusterName, null,
                                                        HelixControllerMain.STANDALONE);
     
      Runtime.getRuntime().addShutdownHook(new Thread()
      {
        @Override
        public void run()
        {
          System.out.println("Shutting down cluster manager: " + manager.getInstanceName());
          manager.disconnect();
        }
      });
     
      Thread.currentThread().join();
    }
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Related Classes of com.linkedin.helix.HelixManager

  • com.linkedin.helix.controller.GenericHelixController
  • com.linkedin.helix.controller.HelixControllerMain
  • com.linkedin.helix.controller.stages.BestPossibleStateCalcStage
  • com.linkedin.helix.controller.stages.CompatibilityCheckStage
  • com.linkedin.helix.controller.stages.ExternalViewComputeStage
  • com.linkedin.helix.controller.stages.MessageGenerationPhase
  • com.linkedin.helix.controller.stages.ReadClusterDataStage
  • com.linkedin.helix.controller.stages.ReadHealthDataStage
  • com.linkedin.helix.controller.stages.StatsAggregationStage
  • com.linkedin.helix.controller.stages.TaskAssignmentStage
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