Package org.apache.helix

Examples of org.apache.helix.NotificationContext

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  @Test()
  public void testAsyncCallbackSvc() throws Exception {
    AsyncCallbackService svc = new AsyncCallbackService();
    HelixManager manager = new MockHelixManager();
    NotificationContext changeContext = new NotificationContext(manager);

    Message msg = new Message(svc.getMessageType(), MessageId.from(UUID.randomUUID().toString()));
    msg.setTgtSessionId(SessionId.from(manager.getSessionId()));
    try {
      svc.createHandler(msg, changeContext);
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    String controllerName = "controller_0";
    MockController controller = new MockController(_zkaddr, clusterName, controllerName);
    GenericHelixController pipeline = new GenericHelixController();

    ZkHelixLeaderElection leader = new ZkHelixLeaderElection(controller.getController(), pipeline);
    NotificationContext context = new NotificationContext(controller);
    context.setType(NotificationContext.Type.INIT);
    leader.onControllerChange(context);

    LiveInstance liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
    AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());

    // Start another controller, leader should remain unchanged
    String controllerName1 = "controller_1";
    MockController controller1 = new MockController(_zkaddr, clusterName, controllerName1);
    GenericHelixController pipeline1 = new GenericHelixController();
    ZkHelixLeaderElection leader1 = new ZkHelixLeaderElection(controller1.getController(), pipeline1);
    NotificationContext context1 = new NotificationContext(controller1);
    context1.setType(NotificationContext.Type.INIT);
    leader1.onControllerChange(context1);
    liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
    AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());

    // clean up
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    String controllerName = "controller_0";
    MockMultiClusterController controller = new MockMultiClusterController(_zkaddr, clusterName, controllerName);
    GenericHelixController pipeline = new GenericHelixController();

    ZkHelixLeaderElection leader = new ZkHelixLeaderElection(controller.getController(), pipeline);
    NotificationContext context = new NotificationContext(controller);
    context.setType(NotificationContext.Type.CALLBACK);
    leader.onControllerChange(context);

    LiveInstance liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
    AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());

    // Start another controller, leader should remain unchanged
    MockMultiClusterController controller1 = new MockMultiClusterController(_zkaddr, clusterName, "controller_1");

    GenericHelixController pipeline1 = new GenericHelixController();
    ZkHelixLeaderElection leader1 = new ZkHelixLeaderElection(controller.getController(), pipeline1);
    context = new NotificationContext(controller);
    context.setType(NotificationContext.Type.CALLBACK);
    leader1.onControllerChange(context);
    liveInstance = accessor.getProperty(keyBuilder.controllerLeader());
    AssertJUnit.assertEquals(controllerName, liveInstance.getInstanceName());

    // clean up
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  public void testOnBecomeLeaderFromStandby() {
    Message message = new Message(MessageType.STATE_TRANSITION, MessageId.from("0"));
    message.setPartitionId(PartitionId.from(clusterName));
    message.setTgtName("controller_0");
    try {
      stateModel.onBecomeLeaderFromStandby(message, new NotificationContext(null));
    } catch (Exception e) {
      LOG.error("Exception becoming leader from standby", e);
    }
    stateModel.onBecomeStandbyFromLeader(message, new NotificationContext(null));
  }
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  @Test()
  public void testOnBecomeStandbyFromLeader() {
    Message message = new Message(MessageType.STATE_TRANSITION, MessageId.from("0"));
    message.setPartitionId(PartitionId.from(clusterName));
    message.setTgtName("controller_0");
    stateModel.onBecomeStandbyFromLeader(message, new NotificationContext(null));
  }
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  public void testRollbackOnError() {
    Message message = new Message(MessageType.STATE_TRANSITION, MessageId.from("0"));
    message.setPartitionId(PartitionId.from(clusterName));
    message.setTgtName("controller_0");
    try {
      stateModel.onBecomeLeaderFromStandby(message, new NotificationContext(null));
    } catch (Exception e) {
      LOG.error("Exception becoming leader from standby", e);
    }
    stateModel.rollbackOnError(message, new NotificationContext(null), null);
  }
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  public void testReset() {
    Message message = new Message(MessageType.STATE_TRANSITION, MessageId.from("0"));
    message.setPartitionId(PartitionId.from(clusterName));
    message.setTgtName("controller_0");
    try {
      stateModel.onBecomeLeaderFromStandby(message, new NotificationContext(null));
    } catch (Exception e) {
      LOG.error("Exception becoming leader from standby", e);
    }
    stateModel.reset();
  }
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    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) {
        stopRebalancingTimer();
        logger.info("Get FINALIZE notification, skip the pipeline. Event :" + event.getName());
        return;
      } else {
        if (_clusterStatusMonitor == null) {
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    executor.registerMessageHandlerFactory(factory.getMessageType(), factory);

    TestMessageHandlerFactory2 factory2 = new TestMessageHandlerFactory2();
    executor.registerMessageHandlerFactory(factory2.getMessageType(), factory2);

    NotificationContext changeContext = new NotificationContext(manager);
    List<Message> msgList = new ArrayList<Message>();

    int nMsgs1 = 5;
    for (int i = 0; i < nMsgs1; i++) {
      Message msg =
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    TestMessageHandlerFactory factory = new TestMessageHandlerFactory();
    executor.registerMessageHandlerFactory(factory.getMessageType(), factory);

    TestMessageHandlerFactory2 factory2 = new TestMessageHandlerFactory2();

    NotificationContext changeContext = new NotificationContext(manager);
    List<Message> msgList = new ArrayList<Message>();

    int nMsgs1 = 5;
    for (int i = 0; i < nMsgs1; i++) {
      Message msg =
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Related Classes of org.apache.helix.NotificationContext

  • org.apache.helix.controller.GenericHelixController
  • org.apache.helix.controller.GenericHelixController$RebalanceTask
  • org.apache.helix.manager.zk.CallbackHandler
  • org.apache.helix.manager.zk.TestDefaultControllerMsgHandlerFactory
  • org.apache.helix.manager.zk.ZkCallbackHandler
  • org.apache.helix.messaging.handling.HelixStateTransitionHandler
  • org.apache.helix.messaging.handling.HelixTaskExecutor
  • org.apache.helix.messaging.handling.TestHelixTaskExecutor
  • org.apache.helix.messaging.TestAsyncCallbackSvc
  • org.apache.helix.monitoring.mbeans.TestClusterStatusMonitor
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