Package org.apache.helix

Examples of org.apache.helix.ZNRecordDelta

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        if (toState.equalsIgnoreCase("DROPPED"))
        {
          // for "OnOfflineToDROPPED" message, we need to remove the resource key record
          // from the current state of the instance because the resource key is dropped.
          // In the state model it will be stayed as "OFFLINE", which is OK.
          ZNRecordDelta delta =
              new ZNRecordDelta(_currentStateDelta.getRecord(), MergeOperation.SUBTRACT);
          // Don't subtract simple fields since they contain stateModelDefRef
          delta._record.getSimpleFields().clear();

          List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
          deltaList.add(delta);
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        accessor.updateProperty(controllerStatusUpdateKey, controllerStatusUpdate);
      }
    }

    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);
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      if (toState.equalsIgnoreCase(HelixDefinedState.DROPPED.toString())) {
        // for "OnOfflineToDROPPED" message, we need to remove the resource key record
        // from the current state of the instance because the resource key is dropped.
        // In the state model it will be stayed as "OFFLINE", which is OK.
        ZNRecordDelta delta =
            new ZNRecordDelta(_currentStateDelta.getRecord(), MergeOperation.SUBTRACT);
        // Don't subtract simple fields since they contain stateModelDefRef
        delta._record.getSimpleFields().clear();

        List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
        deltaList.add(delta);
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                bucketizer.getBucketName(partitionName));
        ZNRecord rec = new ZNRecord(resource);
        Map<String, String> map = new TreeMap<String, String>();
        map.put(CurrentState.CurrentStateProperty.REQUESTED_STATE.name(), null);
        rec.getMapFields().put(partitionName, map);
        ZNRecordDelta delta = new ZNRecordDelta(rec, ZNRecordDelta.MergeOperation.SUBTRACT);
        List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
        deltaList.add(delta);
        CurrentState currStateUpdate = new CurrentState(resource);
        currStateUpdate.setDeltaList(deltaList);
        // Update the ZK current state of the node
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        // In the state model it will be stayed as "OFFLINE", which is OK.

        ZNRecord rec = new ZNRecord(_currentStateDelta.getId());
        // remove mapField keyed by partitionId
        rec.setMapField(partitionId.stringify(), null);
        ZNRecordDelta delta = new ZNRecordDelta(rec, MergeOperation.SUBTRACT);

        List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
        deltaList.add(delta);
        _currentStateDelta.setDeltaList(deltaList);
        _stateModelFactory.removeTransitionHandler(partitionId);
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        accessor.updateProperty(controllerStatusUpdateKey, controllerStatusUpdate);
      }
    }

    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(resourceId);
      delta.setDeltaList(deltaList);
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      if (toState.toString().equalsIgnoreCase(HelixDefinedState.DROPPED.toString())) {
        // for "OnOfflineToDROPPED" message, we need to remove the resource key record
        // from the current state of the instance because the resource key is dropped.
        // In the state model it will be stayed as "OFFLINE", which is OK.
        ZNRecordDelta delta =
            new ZNRecordDelta(_currentStateDelta.getRecord(), MergeOperation.SUBTRACT);
        // Don't subtract simple fields since they contain stateModelDefRef
        delta._record.getSimpleFields().clear();

        List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
        deltaList.add(delta);
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        accessor.updateProperty(controllerStatusUpdateKey, controllerStatusUpdate);
      }
    }

    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(resourceId);
      delta.setDeltaList(deltaList);
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                                                           bucketizer.getBucketName(partitionName));
      ZNRecord rec = new ZNRecord(resource);
      Map<String, String> map = new TreeMap<String, String>();
      map.put(CurrentState.CurrentStateProperty.REQUESTED_STATE.name(), null);
      rec.getMapFields().put(partitionName, map);
      ZNRecordDelta delta = new ZNRecordDelta(rec, ZNRecordDelta.MergeOperation.SUBTRACT);
      List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
      deltaList.add(delta);
      CurrentState currStateUpdate = new CurrentState(resource);
      currStateUpdate.setDeltaList(deltaList);
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        // for "OnOfflineToDROPPED" message, we need to remove the resource key record
        // from the current state of the instance because the resource key is dropped.
        // In the state model it will be stayed as "OFFLINE", which is OK.
        ZNRecord rec = new ZNRecord(_currentStateDelta.getId());
        rec.getMapFields().put(partitionKey, null);
        ZNRecordDelta delta = new ZNRecordDelta(rec, MergeOperation.SUBTRACT);

        List<ZNRecordDelta> deltaList = new ArrayList<ZNRecordDelta>();
        deltaList.add(delta);
        _currentStateDelta.setDeltaList(deltaList);
        _stateModelFactory.removeStateModel(partitionKey);
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Related Classes of org.apache.helix.ZNRecordDelta

  • org.apache.helix.controller.stages.ExternalViewComputeStage
  • org.apache.helix.messaging.handling.HelixStateTransitionHandler
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