Package com.linkedin.helix

Examples of com.linkedin.helix.HelixManager

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  }

  public static HelixManager startHelixController(final String zkConnectString,
      final String clusterName, final String controllerName, final String controllerMode)
  {
    HelixManager manager = null;
    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);

        DistClusterControllerStateModelFactory stateModelFactory = new DistClusterControllerStateModelFactory(
            zkConnectString);

        // StateMachineEngine genericStateMachineHandler = new
        // 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:" +
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    if (propertyTransServicePort > 0)
    {
      ZKPropertyTransferServer.getInstance().init(propertyTransServicePort, zkConnectString);
    }
   
    HelixManager manager = startHelixController(zkConnectString, clusterName, controllerName,
        controllerMode);
    try
    {
      Thread.currentThread().join();
    }
    catch (InterruptedException e)
    {
      logger.info("controller:" + controllerName + ", " + Thread.currentThread().getName()
          + " interrupted");
    }
    finally
    {
      manager.disconnect();
      ZKPropertyTransferServer.getInstance().shutdown();
    }

  }
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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);
      // if resource ideal state has bucket size, set it
      // otherwise resource has been dropped, use bucket size from current state instead
      Resource resource = resourceMap.get(resourceName);
      if (resource.getBucketSize() > 0)
      {
        view.setBucketSize(resource.getBucketSize());
      } else
      {
        view.setBucketSize(currentStateOutput.getBucketSize(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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{
  @Test
  public void TestThreadPoolSizeConfig()
  {
    String instanceName = PARTICIPANT_PREFIX + "_" + (START_PORT + 0);
    HelixManager manager = _startCMResultMap.get(instanceName)._manager;
    ConfigAccessor accessor = manager.getConfigAccessor();
    ConfigScope scope =
        new ConfigScopeBuilder().forCluster(manager.getClusterName()).forResource("NextDB").build();
    accessor.set(scope, HelixTaskExecutor.MAX_THREADS, ""+12);
   
    _setupTool.addResourceToCluster(CLUSTER_NAME, "NextDB", 64, STATE_MODEL);
    _setupTool.rebalanceStorageCluster(CLUSTER_NAME, "NextDB", 3);
   
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    }
  }

  public HelixManager start() throws Exception
  {
    HelixManager manager = null;
    // zk cluster manager
    if (_clusterMangerType.equalsIgnoreCase("zk"))
    {
      manager = HelixManagerFactory.getZKHelixManager(_clusterName,
                                                          _instanceName,
                                                          InstanceType.PARTICIPANT,
                                                          _zkConnectString);
    }
    // static file cluster manager
    else if (_clusterMangerType.equalsIgnoreCase("static-file"))
    {
      manager = HelixManagerFactory.getStaticFileHelixManager(_clusterName,
                                                                  _instanceName,
                                                                  InstanceType.PARTICIPANT,
                                                                  _clusterViewFile);

    }
    // dynamic file cluster manager
    else if (_clusterMangerType.equalsIgnoreCase("dynamic-file"))
    {
      manager = HelixManagerFactory.getDynamicFileHelixManager(_clusterName,
                                                                   _instanceName,
                                                                   InstanceType.PARTICIPANT,
                                                                   _fileStore);
    }
    else
    {
      throw new IllegalArgumentException("Unsupported cluster manager type:" + _clusterMangerType);
    }

    stateModelFactory = new DummyStateModelFactory(_transDelayInMs);
    DummyLeaderStandbyStateModelFactory stateModelFactory1 = new DummyLeaderStandbyStateModelFactory(_transDelayInMs);
    DummyOnlineOfflineStateModelFactory stateModelFactory2 = new DummyOnlineOfflineStateModelFactory(_transDelayInMs);
//    genericStateMachineHandler = new StateMachineEngine();
    StateMachineEngine stateMach = manager.getStateMachineEngine();
    stateMach.registerStateModelFactory("MasterSlave", stateModelFactory);
    stateMach.registerStateModelFactory("LeaderStandby", stateModelFactory1);
    stateMach.registerStateModelFactory("OnlineOffline", stateModelFactory2);

    manager.connect();
//    manager.getMessagingService().registerMessageHandlerFactory(MessageType.STATE_TRANSITION.toString(), genericStateMachineHandler);
    return manager;
  }
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      // since ZkClient.unsubscribe() does not immediately remove listeners
      // from zk, it is possible that two listeners exist when leadership transfers
      // therefore, double check to make sure only one participant invokes the code
      if (context.getType() == Type.CALLBACK)
      {
        HelixManager manager = context.getManager();
        // DataAccessor accessor = manager.getDataAccessor();
        HelixDataAccessor accessor = manager.getHelixDataAccessor();
        Builder keyBuilder = accessor.keyBuilder();

        String instance = manager.getInstanceName();
        String sessionId = manager.getSessionId();

        // get resource name from partition key: "PARTICIPANT_LEADER_XXX_0"
        String resourceName = _partitionKey.substring(0, _partitionKey.lastIndexOf('_'));

        CurrentState curState =
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                                            clusterName,
                                            instanceName,
                                            cmType,
                                            cvFileStr,
                                            delay);
    HelixManager manager = process.start();

    try
    {
      Thread.currentThread().join();
    }
    catch (InterruptedException e)
    {
      // ClusterManagerFactory.disconnectManagers(instanceName);
      logger.info("participant:" + instanceName + ", " +
                   Thread.currentThread().getName() + " interrupted");
//      if (manager != null)
//      {
//        manager.disconnect();
//      }
    }
    finally
    {
      if (manager != null)
      {
        manager.disconnect();
      }
    }

  }
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  @Transition(to="LEADER",from="STANDBY")
  public void onBecomeLeaderFromStandby(Message message, NotificationContext context)
      throws Exception
  {
    LOG.info("Become LEADER from STANDBY");
    HelixManager manager = context.getManager();
    if (manager == null)
    {
      throw new IllegalArgumentException("Require HelixManager in notification conext");
    }
    for (ChangeType notificationType : _notificationTypes)
    {
      if (notificationType == ChangeType.LIVE_INSTANCE)
      {
        manager.addLiveInstanceChangeListener(_particHolder);
      }
      else if (notificationType == ChangeType.CONFIG)
      {
        manager.addConfigChangeListener(_particHolder);
      }
      else if (notificationType == ChangeType.EXTERNAL_VIEW)
      {
        manager.addExternalViewChangeListener(_particHolder);
      }
      else
      {
        LOG.error("Unsupport notificationType:" + notificationType.toString());
      }
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  public class ExpandAlertTransition extends MockTransition
  {
    @Override
    public void doTransition(Message message, NotificationContext context)
    {
      HelixManager manager = context.getManager();
      HelixDataAccessor accessor = manager.getHelixDataAccessor();
      String fromState = message.getFromState();
      String toState = message.getToState();
      String instance = message.getTgtName();
      String partition = message.getPartitionName();
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  @Transition(to="STANDBY",from="LEADER")
  public void onBecomeStandbyFromLeader(Message message, NotificationContext context)
  {
    LOG.info("Become STANDBY from LEADER");
    HelixManager manager = context.getManager();
    manager.removeListener(_particHolder);   
  }
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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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