Package org.apache.helix.controller.stages

Examples of org.apache.helix.controller.stages.ClusterEvent

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   * @return
   * @throws Exception
   */

  static BestPossibleStateOutput calcBestPossState(Cluster cluster) throws Exception {
    ClusterEvent event = new ClusterEvent("sampleEvent");
    event.addAttribute("ClusterDataCache", cluster);

    ResourceComputationStage rcState = new ResourceComputationStage();
    CurrentStateComputationStage csStage = new CurrentStateComputationStage();
    BestPossibleStateCalcStage bpStage = new BestPossibleStateCalcStage();

    runStage(event, rcState);
    runStage(event, csStage);
    runStage(event, bpStage);

    BestPossibleStateOutput output =
        event.getAttribute(AttributeName.BEST_POSSIBLE_STATE.toString());

    return output;
  }
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  @Override
  public void onStateChange(String instanceName, List<CurrentState> statesInfo,
      NotificationContext changeContext) {
    logger.info("START: GenericClusterController.onStateChange()");
    ClusterEvent event = new ClusterEvent("currentStateChange");
    event.addAttribute("helixmanager", changeContext.getManager());
    event.addAttribute("instanceName", instanceName);
    event.addAttribute("changeContext", changeContext);
    event.addAttribute("eventData", statesInfo);
    handleEvent(event);
    logger.info("END: GenericClusterController.onStateChange()");
  }
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  @Override
  public void onMessage(String instanceName, List<Message> messages,
      NotificationContext changeContext) {
    logger.info("START: GenericClusterController.onMessage()");

    ClusterEvent event = new ClusterEvent("messageChange");
    event.addAttribute("helixmanager", changeContext.getManager());
    event.addAttribute("instanceName", instanceName);
    event.addAttribute("changeContext", changeContext);
    event.addAttribute("eventData", messages);
    handleEvent(event);

    if (_clusterStatusMonitor != null && messages != null) {
      _clusterStatusMonitor.addMessageQueueSize(instanceName, messages.size());
    }
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          + _lastSeenInstances + ", lastSeenSessions: " + _lastSeenSessions);
      liveInstances = Collections.emptyList();
      checkLiveInstancesObservation(liveInstances, changeContext);
    }

    ClusterEvent event = new ClusterEvent("liveInstanceChange");
    event.addAttribute("helixmanager", changeContext.getManager());
    event.addAttribute("changeContext", changeContext);
    event.addAttribute("eventData", liveInstances);
    handleEvent(event);
    logger.info("END: Generic GenericClusterController.onLiveInstanceChange()");
  }
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  }

  @Override
  public void onIdealStateChange(List<IdealState> idealStates, NotificationContext changeContext) {
    logger.info("START: Generic GenericClusterController.onIdealStateChange()");
    ClusterEvent event = new ClusterEvent("idealStateChange");
    event.addAttribute("helixmanager", changeContext.getManager());
    event.addAttribute("changeContext", changeContext);
    event.addAttribute("eventData", idealStates);
    handleEvent(event);

    if (changeContext.getType() != Type.FINALIZE) {
      checkRebalancingTimer(changeContext.getManager(), idealStates);
    }
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  }

  @Override
  public void onConfigChange(List<InstanceConfig> configs, NotificationContext changeContext) {
    logger.info("START: GenericClusterController.onConfigChange()");
    ClusterEvent event = new ClusterEvent("configChange");
    event.addAttribute("changeContext", changeContext);
    event.addAttribute("helixmanager", changeContext.getManager());
    event.addAttribute("eventData", configs);
    handleEvent(event);
    logger.info("END: GenericClusterController.onConfigChange()");
  }
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    } else {
      if (_paused) {
        // it currently paused
        logger.info("controller is now resumed");
        _paused = false;
        ClusterEvent event = new ClusterEvent("resume");
        event.addAttribute("changeContext", changeContext);
        event.addAttribute("helixmanager", changeContext.getManager());
        event.addAttribute("eventData", pauseSignal);
        handleEvent(event);
      } else {
        _paused = false;
      }
    }
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    @Override
    public void run() {
      NotificationContext changeContext = new NotificationContext(_manager);
      changeContext.setType(NotificationContext.Type.CALLBACK);
      ClusterEvent event = new ClusterEvent("periodicalRebalance");
      event.addAttribute("helixmanager", changeContext.getManager());
      event.addAttribute("changeContext", changeContext);
      List<ZNRecord> dummy = new ArrayList<ZNRecord>();
      event.addAttribute("eventData", dummy);
      // Should be able to process
      handleEvent(event);
    }
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    System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));

    // Set up the event
    ClusterAccessor clusterAccessor = new ClusterAccessor(_clusterId, _dataAccessor);
    Cluster cluster = clusterAccessor.readCluster();
    ClusterEvent event = new ClusterEvent(testName);
    event.addAttribute(AttributeName.CURRENT_STATE.toString(), new ResourceCurrentState());
    Map<ResourceId, ResourceConfig> resourceConfigMap =
        Maps.transformValues(cluster.getResourceMap(), new Function<Resource, ResourceConfig>() {
          @Override
          public ResourceConfig apply(Resource resource) {
            return resource.getConfig();
          }
        });
    event.addAttribute(AttributeName.RESOURCES.toString(), resourceConfigMap);
    event.addAttribute("ClusterDataCache", cluster);

    // Run the stage
    try {
      new BestPossibleStateCalcStage().process(event);
    } catch (Exception e) {
      Assert.fail(e.toString());
    }

    // Verify the result
    BestPossibleStateOutput bestPossibleStateOutput =
        event.getAttribute(AttributeName.BEST_POSSIBLE_STATE.toString());
    Assert.assertNotNull(bestPossibleStateOutput);
    ResourceId resourceId = ResourceId.from("TestDB0");
    ResourceAssignment assignment = bestPossibleStateOutput.getResourceAssignment(resourceId);
    Assert.assertNotNull(assignment);
    Resource resource = cluster.getResource(resourceId);
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    stage.process(event);
    stage.postProcess();
  }

  BestPossibleStateOutput calculateBestPossibleState(Cluster cluster) throws Exception {
    ClusterEvent event = new ClusterEvent("event");
    event.addAttribute("ClusterDataCache", cluster);

    List<Stage> stages = new ArrayList<Stage>();
    stages.add(new ResourceComputationStage());
    stages.add(new CurrentStateComputationStage());
    stages.add(new BestPossibleStateCalcStage());

    for (Stage stage : stages) {
      runStage(event, stage);
    }

    return event.getAttribute(AttributeName.BEST_POSSIBLE_STATE.toString());
  }
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Related Classes of org.apache.helix.controller.stages.ClusterEvent

  • org.apache.helix.api.TestNewStages
  • org.apache.helix.controller.GenericHelixController
  • org.apache.helix.controller.GenericHelixController$ClusterEventProcessor
  • org.apache.helix.controller.GenericHelixController$RebalanceTask
  • org.apache.helix.controller.stages.BaseStageTest
  • org.apache.helix.controller.stages.TestMessageThrottleStage
  • org.apache.helix.controller.stages.TestRebalancePipeline
  • org.apache.helix.controller.stages.TestResourceComputationStage
  • org.apache.helix.controller.stages.TestStagesWithLogicalAccessors
  • org.apache.helix.healthcheck.HealthStatsAggregationTask
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