Examples of org.apache.helix.model.IdealState

org.apache.helix.model.IdealState
The ideal states of all partition in a resource


    _gSetupTool.addCluster(clusterName, true);
    HelixAdmin admin = _gSetupTool.getClusterManagementTool();


    // Add a tagged resource
    IdealState taggedResource = new IdealState("taggedResource");
    taggedResource.setInstanceGroupTag(TAG);
    taggedResource.setStateModelDefRef("OnlineOffline");
    admin.addResource(clusterName, taggedResource.getId(), taggedResource);


    // Add an untagged resource
    IdealState untaggedResource = new IdealState("untaggedResource");
    untaggedResource.setStateModelDefRef("OnlineOffline");
    admin.addResource(clusterName, untaggedResource.getId(), untaggedResource);


    // Now make a REST call for all resources
    Reference resourceRef = new Reference(URL_BASE);
    Request request = new Request(Method.GET, resourceRef);
    Response response = _gClient.handle(request);
    ZNRecord responseRecord =
        ClusterRepresentationUtil.JsonToObject(ZNRecord.class, response.getEntityAsText());


    // Ensure that the tagged resource has information and the untagged one doesn't
    Assert.assertNotNull(responseRecord.getMapField("ResourceTags"));
    Assert
        .assertEquals(TAG, responseRecord.getMapField("ResourceTags").get(taggedResource.getId()));
    Assert.assertFalse(responseRecord.getMapField("ResourceTags").containsKey(
        untaggedResource.getId()));
  }

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        String taskQueueName = _message.getRecord().getSimpleField(SCHEDULER_TASK_QUEUE);
        if (taskQueueName == null) {
          throw new HelixException("SchedulerTaskMessage need to have " + SCHEDULER_TASK_QUEUE
              + " specified.");
        }
        IdealState newAddedScheduledTasks = new IdealState(taskQueueName);
        newAddedScheduledTasks.setBucketSize(TASKQUEUE_BUCKET_NUM);
        newAddedScheduledTasks.setStateModelDefRef(SCHEDULER_TASK_QUEUE);


        synchronized (_manager) {
          int existingTopPartitionId = 0;
          IdealState currentTaskQueue =
              _manager.getHelixDataAccessor().getProperty(
                  accessor.keyBuilder().idealStates(newAddedScheduledTasks.getId()));
          if (currentTaskQueue != null) {
            existingTopPartitionId = findTopPartitionId(currentTaskQueue) + 1;
          }

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  public void verifyReplication(ZkClient zkClient, String clusterName, String resource, int repl) {
    ZKHelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(zkClient));
    Builder keyBuilder = accessor.keyBuilder();


    IdealState idealState = accessor.getProperty(keyBuilder.idealStates(resource));
    for (String partitionName : idealState.getPartitionSet()) {
      if (idealState.getRebalanceMode() == RebalanceMode.SEMI_AUTO) {
        AssertJUnit.assertEquals(repl, idealState.getPreferenceList(partitionName).size());
      } else if (idealState.getRebalanceMode() == RebalanceMode.CUSTOMIZED) {
        AssertJUnit.assertEquals(repl, idealState.getInstanceStateMap(partitionName).size());
      }
    }
  }

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    for (int i : nodes) {
      instances.add("localhost_" + i);
    }


    for (String resourceName : resources) {
      IdealState idealState = new IdealState(resourceName);
      for (int p = 0; p < partitions; p++) {
        List<String> value = new ArrayList<String>();
        for (int r = 0; r < replicas; r++) {
          int n = nodes[(p + r) % nodes.length];
          value.add("localhost_" + n);
        }
        idealState.getRecord().setListField(resourceName + "_" + p, value);
      }


      idealState.setReplicas(Integer.toString(replicas));
      idealState.setStateModelDefRef("MasterSlave");
      idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
      idealState.setNumPartitions(partitions);
      idealStates.add(idealState);


      // System.out.println(idealState);
      accessor.setProperty(keyBuilder.idealStates(resourceName), idealState);
    }

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        }
      }
      // Update cluster status monitor mbean
      ClusterStatusMonitor clusterStatusMonitor =
          (ClusterStatusMonitor) event.getAttribute("clusterStatusMonitor");
      IdealState idealState = cache._idealStateMap.get(view.getResourceName());
      if (idealState != null) {
        if (clusterStatusMonitor != null
            && !idealState.getStateModelDefRef().equalsIgnoreCase(
                DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE)) {
          clusterStatusMonitor.onExternalViewChange(view,
              cache._idealStateMap.get(view.getResourceName()));
        }
      }


      // compare the new external view with current one, set only on different
      ExternalView curExtView = curExtViews.get(resourceName);
      if (curExtView == null || !curExtView.getRecord().equals(view.getRecord())) {
        keys.add(keyBuilder.externalView(resourceName));
        newExtViews.add(view);


        // For SCHEDULER_TASK_RESOURCE resource group (helix task queue), we need to find out which
        // task
        // partitions are finished (COMPLETED or ERROR), update the status update of the original
        // scheduler
        // message, and then remove the partitions from the ideal state
        if (idealState != null
            && idealState.getStateModelDefRef().equalsIgnoreCase(
                DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE)) {
          updateScheduledTaskStatus(view, manager, idealState);
        }
      }
    }

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    if (finishedTasks.getListFields().size() > 0) {
      ZNRecordDelta znDelta = new ZNRecordDelta(finishedTasks, MergeOperation.SUBTRACT);
      List<ZNRecordDelta> deltaList = new LinkedList<ZNRecordDelta>();
      deltaList.add(znDelta);
      IdealState delta = new IdealState(taskQueueIdealState.getResourceName());
      delta.setDeltaList(deltaList);


      // Remove the finished (COMPLETED or ERROR) tasks from the SCHEDULER_TASK_RESOURCE idealstate
      keyBuilder = accessor.keyBuilder();
      accessor.updateProperty(keyBuilder.idealStates(taskQueueIdealState.getResourceName()), delta);
    }

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    for (String resourceName : resourceMap.keySet()) {
      Resource resource = resourceMap.get(resourceName);
      StateModelDefinition stateModelDef = cache.getStateModelDef(resource.getStateModelDefRef());


      Map<String, Integer> stateTransitionPriorities = getStateTransitionPriorityMap(stateModelDef);
      IdealState idealState = cache.getIdealState(resourceName);
      Map<String, Bounds> stateConstraints =
          computeStateConstraints(stateModelDef, idealState, cache);


      for (Partition partition : resource.getPartitions()) {
        List<Message> messages = messageGenOutput.getMessages(resourceName, partition);

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    Map<String, Map<String, String>> idealStateRuleMap = cache.getIdealStateRules();


    for (String resourceName : idealStateMap.keySet()) {
      // check every ideal state against the ideal state rules
      // the pipeline should not process any resources that have an unsupported ideal state
      IdealState idealState = idealStateMap.get(resourceName);
      if (!idealStateRuleMap.isEmpty()) {
        boolean hasMatchingRule = false;
        for (String ruleName : idealStateRuleMap.keySet()) {
          Map<String, String> rule = idealStateRuleMap.get(ruleName);
          boolean matches = idealStateMatchesRule(idealState, rule);
          hasMatchingRule = hasMatchingRule || matches;
          if (matches) {
            break;
          }
        }
        if (!hasMatchingRule) {
          LOG.warn("Resource " + resourceName + " does not have a valid ideal state!");
          resourceMap.remove(resourceName);
        }
      }


      // check that every resource to process has a live state model definition
      String stateModelDefRef = idealState.getStateModelDefRef();
      StateModelDefinition stateModelDef = cache.getStateModelDef(stateModelDefRef);
      if (stateModelDef == null) {
        LOG.warn("Resource " + resourceName + " uses state model " + stateModelDefRef
            + ", but it is not on the cluster!");
        resourceMap.remove(resourceName);

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        "MasterSlave", RebalanceMode.FULL_AUTO, // use FULL_AUTO mode to test node tagging
        true); // do rebalance


    // tag the resource
    HelixAdmin helixAdmin = new ZKHelixAdmin(ZK_ADDR);
    IdealState idealState = helixAdmin.getResourceIdealState(clusterName, RESOURCE_NAME);
    idealState.setInstanceGroupTag(TAG);
    helixAdmin.setResourceIdealState(clusterName, RESOURCE_NAME, idealState);


    // start controller
    ClusterControllerManager controller =
        new ClusterControllerManager(ZK_ADDR, clusterName, "controller");

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    // tag the resource and participants
    HelixAdmin helixAdmin = new ZKHelixAdmin(ZK_ADDR);
    for (String taggedNode : TAGGED_NODES) {
      helixAdmin.addInstanceTag(clusterName, taggedNode, TAG);
    }
    IdealState idealState = helixAdmin.getResourceIdealState(clusterName, RESOURCE_NAME);
    idealState.setInstanceGroupTag(TAG);
    helixAdmin.setResourceIdealState(clusterName, RESOURCE_NAME, idealState);


    // start controller
    ClusterControllerManager controller =
        new ClusterControllerManager(ZK_ADDR, clusterName, "controller");

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