Package org.apache.helix.model

Examples of org.apache.helix.model.Message

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                                        String clusterName,
                                        String instanceName,
                                        String payloadString,
                                        String partition)
  {
    Message message = new Message("FaultInjection", UUID.randomUUID().toString());
    if(payloadString != null)
    {
      message.getRecord().setSimpleField("faultType", payloadString);
    }
    if(partition != null)
    {
      message.setPartitionName(partition);
    }
   
    post(zkServer, message, clusterName, instanceName);
  }
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  public void postTestMessage(String zkServer, String clusterName, String instanceName)
  {
    String msgSrc = "cm-instance-0";
    String msgId = "TestMessageId-2";

    Message message = new Message(MessageType.STATE_TRANSITION, msgId);
    message.setMsgId(msgId);
    message.setSrcName(msgSrc);
    message.setTgtName(instanceName);
    message.setMsgState(MessageState.NEW);
    message.setFromState("Slave");
    message.setToState("Master");
    message.setPartitionName("EspressoDB.partition-0." + instanceName);

    post(zkServer, message, clusterName, instanceName);
  }
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      if(criteriaString == null)
      {
        throw new HelixException("SchedulerTasksResource need to have Criteria specified.");
      }
     
      Message schedulerMessage = new Message(MessageType.SCHEDULER_MSG, UUID.randomUUID().toString());
      schedulerMessage.getRecord().getSimpleFields().put(CRITERIA, criteriaString);
     
      schedulerMessage.getRecord().getMapFields().put(MESSAGETEMPLATE, messageTemplate);
     
      schedulerMessage.setTgtSessionId("*");
      schedulerMessage.setTgtName("CONTROLLER");
      schedulerMessage.setSrcInstanceType(InstanceType.CONTROLLER);
     
      HelixDataAccessor accessor = ClusterRepresentationUtil.getClusterDataAccessor(zkClient, clusterName);
      accessor.setProperty(accessor.keyBuilder().controllerMessage(schedulerMessage.getMsgId()), schedulerMessage);
     
      Map<String, String> resultMap = new HashMap<String, String>();
      resultMap.put("StatusUpdatePath", PropertyPathConfig.getPath(PropertyType.STATUSUPDATES_CONTROLLER, clusterName, MessageType.SCHEDULER_MSG.toString(),schedulerMessage.getMsgId()));
      resultMap.put("MessageType", Message.MessageType.SCHEDULER_MSG.toString());
      resultMap.put("MsgId", schedulerMessage.getMsgId());
     
      // Assemble the rest URL for task status update
      String ipAddress = InetAddress.getLocalHost().getCanonicalHostName();
      String url = "http://" + ipAddress+":" + getContext().getAttributes().get(RestAdminApplication.PORT)
          + "/clusters/" + clusterName+"/Controller/statusUpdates/SCHEDULER_MSG/" + schedulerMessage.getMsgId();
      resultMap.put("statusUpdateUrl", url);
     
      getResponse().setEntity(ClusterRepresentationUtil.ObjectToJson(resultMap), MediaType.APPLICATION_JSON);
      getResponse().setStatus(Status.SUCCESS_OK);
    }
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    List<PropertyKey> messageKeys = new ArrayList<PropertyKey>();
    for (String partitionName : resetPartitionNames)
    {
      // send ERROR to initialState message
      String msgId = UUID.randomUUID().toString();
      Message message = new Message(MessageType.STATE_TRANSITION, msgId);
      message.setSrcName(adminName);
      message.setTgtName(instanceName);
      message.setMsgState(MessageState.NEW);
      message.setPartitionName(partitionName);
      message.setResourceName(resourceName);
      message.setTgtSessionId(sessionId);
      message.setStateModelDef(stateModelDef);
      message.setFromState("ERROR");
      message.setToState(stateModel.getInitialState());
      message.setStateModelFactoryName(idealState.getStateModelFactoryName());

      resetMessages.add(message);
      messageKeys.add(keyBuilder.message(instanceName, message.getId()));
    }

    accessor.setChildren(messageKeys, resetMessages);
  }
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  @Test()
  public void testCMTaskExecutor() throws Exception
  {
    System.out.println("START TestCMTaskExecutor");
    String msgId = "TestMessageId";
    Message message = new Message(MessageType.TASK_REPLY, msgId);

    message.setMsgId(msgId);
    message.setSrcName("cm-instance-0");
    message.setTgtName("cm-instance-1");
    message.setTgtSessionId("1234");
    message.setFromState("Offline");
    message.setToState("Slave");
    message.setPartitionName("TestDB_0");
    message.setResourceName("TestDB");
    message.setStateModelDef("MasterSlave");

    MockManager manager = new MockManager("clusterName");
    // DataAccessor accessor = manager.getDataAccessor();
    HelixDataAccessor accessor = manager.getHelixDataAccessor();
    StateModelConfigGenerator generator = new StateModelConfigGenerator();
    StateModelDefinition stateModelDef =
        new StateModelDefinition(generator.generateConfigForMasterSlave());
    Builder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.stateModelDef("MasterSlave"), stateModelDef);

    MockHelixTaskExecutor executor = new MockHelixTaskExecutor();
    MockStateModel stateModel = new MockStateModel();
    NotificationContext context;
    executor.registerMessageHandlerFactory(MessageType.TASK_REPLY.toString(),
                                           new AsyncCallbackService());
    // String clusterName =" testcluster";
    context = new NotificationContext(manager);
    CurrentState currentStateDelta = new CurrentState("TestDB");
    currentStateDelta.setState("TestDB_0", "OFFLINE");
    HelixStateTransitionHandler handler =
        new HelixStateTransitionHandler(stateModel,
                                        message,
                                        context,
                                        currentStateDelta,
                                        executor);

    executor.scheduleTask(message, handler, context);
    while (!executor.isDone(msgId + "/" + message.getPartitionName()))
    {
      Thread.sleep(500);
    }
    AssertJUnit.assertTrue(stateModel.stateModelInvoked);
    System.out.println("END TestCMTaskExecutor");
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  {
    System.out.println("START TestDefaultControllerMsgHandlerFactory at " + new Date(System.currentTimeMillis()));

    DefaultControllerMessageHandlerFactory facotry = new DefaultControllerMessageHandlerFactory();

    Message message = new Message(MessageType.NO_OP, "0");
    NotificationContext context = new NotificationContext(null);

    boolean exceptionCaught = false;
    try
    {
      MessageHandler handler = facotry.createHandler(message, context);
    } catch (HelixException e)
    {
      exceptionCaught = true;
    }
    AssertJUnit.assertTrue(exceptionCaught);

    message = new Message(MessageType.CONTROLLER_MSG, "1");
    exceptionCaught = false;
    try
    {
      MessageHandler handler = facotry.createHandler(message, context);
    } catch (HelixException e)
    {
      exceptionCaught = true;
    }
    AssertJUnit.assertFalse(exceptionCaught);

    Map<String, String> resultMap = new HashMap<String, String>();
    message = new Message(MessageType.NO_OP, "3");
    DefaultControllerMessageHandler defaultHandler = new DefaultControllerMessageHandler(message, context);
    try
    {
      defaultHandler.handleMessage();
    } catch (HelixException e)
    {
      exceptionCaught = true;
    }
    catch (InterruptedException e)
    {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    AssertJUnit.assertTrue(exceptionCaught);

    message = new Message(MessageType.CONTROLLER_MSG, "4");
    defaultHandler = new DefaultControllerMessageHandler(message, context);
    exceptionCaught = false;
    try
    {
      defaultHandler.handleMessage();
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                                      String toState,
                                      String tgtName,
                                      String resourceName,
                                      String partitionName)
  {
    Message msg = new Message(MessageType.STATE_TRANSITION, msgId);
    msg.setFromState(fromState);
    msg.setToState(toState);
    msg.setTgtName(tgtName);
    msg.setResourceName(resourceName);
    msg.setPartitionName(partitionName);
    msg.setStateModelDef("MasterSlave");

    return msg;
  }
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  @Test()
  public void testInvocation() throws Exception
  {
    HelixTaskExecutor executor = new HelixTaskExecutor();
    System.out.println("START TestCMTaskHandler.testInvocation()");
    Message message = new Message(MessageType.STATE_TRANSITION, "Some unique id");

    message.setSrcName("cm-instance-0");
    message.setTgtSessionId("1234");
    message.setFromState("Offline");
    message.setToState("Slave");
    message.setPartitionName("TestDB_0");
    message.setMsgId("Some unique message id");
    message.setResourceName("TestDB");
    message.setTgtName("localhost");
    message.setStateModelDef("MasterSlave");
    message.setStateModelFactoryName(HelixConstants.DEFAULT_STATE_MODEL_FACTORY);
    MockStateModel stateModel = new MockStateModel();
    NotificationContext context;
    MockManager manager = new MockManager("clusterName");
//    DataAccessor accessor = manager.getDataAccessor();
    HelixDataAccessor accessor = manager.getHelixDataAccessor();
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  public void testInvocationAnnotated() throws Exception
  {
    System.out.println("START TestCMTaskHandler.testInvocationAnnotated() at "
        + new Date(System.currentTimeMillis()));
    HelixTaskExecutor executor = new HelixTaskExecutor();
    Message message = new Message(MessageType.STATE_TRANSITION, "Some unique id");
    message.setSrcName("cm-instance-0");
    message.setTgtSessionId("1234");
    message.setFromState("Offline");
    message.setToState("Slave");
    message.setPartitionName("TestDB_0");
    message.setMsgId("Some unique message id");
    message.setResourceName("TestDB");
    message.setTgtName("localhost");
    message.setStateModelDef("MasterSlave");
    message.setStateModelFactoryName(HelixConstants.DEFAULT_STATE_MODEL_FACTORY);
    MockStateModelAnnotated stateModel = new MockStateModelAnnotated();
    NotificationContext context;

    MockManager manager = new MockManager("clusterName");
//    DataAccessor accessor = manager.getDataAccessor();
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      // Parse the message template
      ZNRecord record = new ZNRecord("templateMessage");
      record.getSimpleFields().putAll(
          _message.getRecord().getMapField("MessageTemplate"));
      Message messageTemplate = new Message(record);

      // Parse the criteria
      StringReader sr = new StringReader(_message.getRecord().getSimpleField(
          "Criteria"));
      ObjectMapper mapper = new ObjectMapper();
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Related Classes of org.apache.helix.model.Message

  • org.apache.helix.api.accessor.ClusterAccessor
  • org.apache.helix.api.accessor.ParticipantAccessor
  • org.apache.helix.api.config.SchedulerTaskConfig
  • org.apache.helix.api.Resource
  • org.apache.helix.controller.stages.ContainerProvisioningStage
  • org.apache.helix.controller.stages.ExternalViewComputeStage
  • org.apache.helix.controller.stages.MessageGenerationPhase
  • org.apache.helix.controller.stages.MessageGenerationStage
  • org.apache.helix.controller.stages.TaskAssignmentStage
  • org.apache.helix.controller.stages.TestCurrentStateComputationStage
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