Package org.apache.helix.model

Examples of org.apache.helix.model.Resource

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    }

    HelixDataAccessor dataAccessor = manager.getHelixDataAccessor();
    List<Message> messagesToSend = new ArrayList<Message>();
    for (String resourceName : resourceMap.keySet()) {
      Resource resource = resourceMap.get(resourceName);
      for (Partition partition : resource.getPartitions()) {
        List<Message> messages = messageOutput.getMessages(resourceName, partition);
        messagesToSend.addAll(messages);
      }
    }
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    Iterator<Message> iter = messages.iterator();
    while (iter.hasNext()) {
      Message message = iter.next();
      String resourceName = message.getResourceName();
      Resource resource = resourceMap.get(resourceName);

      String instanceName = message.getTgtName();
      LiveInstance liveInstance = liveInstanceMap.get(instanceName);
      String participantVersion = null;
      if (liveInstance != null) {
        participantVersion = liveInstance.getHelixVersion();
      }

      if (resource == null || !resource.getBatchMessageMode() || participantVersion == null
          || !properties.isFeatureSupported("batch_message", participantVersion)) {
        outputMessages.add(message);
        continue;
      }
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    for (String resourceName : resourceMap.keySet()) {
      ExternalView view = new ExternalView(resourceName);
      // view.setBucketSize(currentStateOutput.getBucketSize(resourceName));
      // if resource ideal state has bucket size, set it
      // otherwise resource has been dropped, use bucket size from current state instead
      Resource resource = resourceMap.get(resourceName);
      if (resource.getBucketSize() > 0) {
        view.setBucketSize(resource.getBucketSize());
      } else {
        view.setBucketSize(currentStateOutput.getBucketSize(resourceName));
      }

      for (Partition partition : resource.getPartitions()) {
        Map<String, String> currentStateMap =
            currentStateOutput.getCurrentStateMap(resourceName, partition);
        if (currentStateMap != null && currentStateMap.size() > 0) {
          // Set<String> disabledInstances
          // = cache.getDisabledInstancesForResource(resource.toString());
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    }

    MessageSelectionStageOutput output = new MessageSelectionStageOutput();

    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);
        List<Message> selectedMessages =
            selectMessages(cache.getLiveInstances(),
                currentStateOutput.getCurrentStateMap(resourceName, partition),
                currentStateOutput.getPendingStateMap(resourceName, partition), messages,
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    }

    // go through all new messages, throttle if necessary
    // assume messages should be sorted by state transition priority in messageSelection stage
    for (String resourceName : resourceMap.keySet()) {
      Resource resource = resourceMap.get(resourceName);
      for (Partition partition : resource.getPartitions()) {
        List<Message> messages = msgSelectionOutput.getMessages(resourceName, partition);
        if (constraint != null && messages != null && messages.size() > 0) {
          messages = throttle(throttleCounterMap, constraint, messages, true);
        }
        output.addMessages(resourceName, partition, messages);
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        }
        if (!instance.getSessionId().equals(message.getTgtSessionId())) {
          continue;
        }
        String resourceName = message.getResourceName();
        Resource resource = resourceMap.get(resourceName);
        if (resource == null) {
          continue;
        }

        if (!message.getBatchMessageMode()) {
          String partitionName = message.getPartitionName();
          Partition partition = resource.getPartition(partitionName);
          if (partition != null) {
            currentStateOutput.setPendingState(resourceName, partition, instanceName,
                message.getToState());
          } else {
            // log
          }
        } else {
          List<String> partitionNames = message.getPartitionNames();
          if (!partitionNames.isEmpty()) {
            for (String partitionName : partitionNames) {
              Partition partition = resource.getPartition(partitionName);
              if (partition != null) {
                currentStateOutput.setPendingState(resourceName, partition, instanceName,
                    message.getToState());
              } else {
                // log
              }
            }
          }
        }
      }
    }
    for (LiveInstance instance : liveInstances.values()) {
      String instanceName = instance.getInstanceName();

      String clientSessionId = instance.getSessionId();
      Map<String, CurrentState> currentStateMap =
          cache.getCurrentState(instanceName, clientSessionId);
      for (CurrentState currentState : currentStateMap.values()) {

        if (!instance.getSessionId().equals(currentState.getSessionId())) {
          continue;
        }
        String resourceName = currentState.getResourceName();
        String stateModelDefName = currentState.getStateModelDefRef();
        Resource resource = resourceMap.get(resourceName);
        if (resource == null) {
          continue;
        }
        if (stateModelDefName != null) {
          currentStateOutput.setResourceStateModelDef(resourceName, stateModelDefName);
        }

        currentStateOutput.setBucketSize(resourceName, currentState.getBucketSize());

        Map<String, String> partitionStateMap = currentState.getPartitionStateMap();
        for (String partitionName : partitionStateMap.keySet()) {
          Partition partition = resource.getPartition(partitionName);
          if (partition != null) {
            currentStateOutput.setCurrentState(resourceName, partition, instanceName,
                currentState.getState(partitionName));

          } else {
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      InstanceConfig config = new InstanceConfig(instanceName);
      instanceConfigMap.put(instanceName, config);
    }

    Map<String, Resource> resourceMap = Maps.newHashMap();
    Resource db = new Resource(testDB);
    db.setStateModelDefRef("MasterSlave");
    db.addPartition(testDB_0);
    resourceMap.put(testDB, db);

    Map<String, StateModelDefinition> stateModelDefMap = Maps.newHashMap();
    StateModelDefinition msStateModelDef =
        new StateModelDefinition(StateModelConfigGenerator.generateConfigForMasterSlave());
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    BestPossibleStateOutput output = new BestPossibleStateOutput();

    for (String resourceName : resourceMap.keySet()) {
      logger.debug("Processing resource:" + resourceName);

      Resource resource = resourceMap.get(resourceName);
      // Ideal state may be gone. In that case we need to get the state model name
      // from the current state
      IdealState idealState = cache.getIdealState(resourceName);

      if (idealState == null) {
        // if ideal state is deleted, use an empty one
        logger.info("resource:" + resourceName + " does not exist anymore");
        idealState = new IdealState(resourceName);
        idealState.setStateModelDefRef(resource.getStateModelDefRef());
      }

      Rebalancer rebalancer = null;
      MappingCalculator mappingCalculator = null;
      switch (idealState.getRebalanceMode()) {
      case FULL_AUTO:
        AutoRebalancer autoRebalancer = new AutoRebalancer();
        rebalancer = autoRebalancer;
        mappingCalculator = autoRebalancer;
        break;
      case SEMI_AUTO:
        SemiAutoRebalancer semiAutoRebalancer = new SemiAutoRebalancer();
        rebalancer = semiAutoRebalancer;
        mappingCalculator = semiAutoRebalancer;
        break;
      case CUSTOMIZED:
        CustomRebalancer customRebalancer = new CustomRebalancer();
        rebalancer = customRebalancer;
        mappingCalculator = customRebalancer;
        break;
      case USER_DEFINED:
      case TASK:
        String rebalancerClassName = idealState.getRebalancerClassName();
        logger
            .info("resource " + resourceName + " use idealStateRebalancer " + rebalancerClassName);
        try {
          rebalancer =
              Rebalancer.class.cast(HelixUtil.loadClass(getClass(), rebalancerClassName)
                  .newInstance());
        } catch (Exception e) {
          logger.warn("Exception while invoking custom rebalancer class:" + rebalancerClassName, e);
        }
        if (rebalancer != null) {
          try {
            mappingCalculator = MappingCalculator.class.cast(rebalancer);
          } catch (ClassCastException e) {
            logger.info("Rebalancer does not have a mapping calculator, defaulting to SEMI_AUTO");
          }
        }
        if (mappingCalculator == null) {
          mappingCalculator = new SemiAutoRebalancer();
        }
        break;
      default:
        break;
      }
      if (rebalancer != null && mappingCalculator != null) {
        try {
          HelixManager manager = event.getAttribute("helixmanager");
          rebalancer.init(manager);
          idealState =
              rebalancer.computeNewIdealState(resourceName, idealState, currentStateOutput, cache);

          // Use the internal MappingCalculator interface to compute the final assignment
          // The next release will support rebalancers that compute the mapping from start to finish
          ResourceAssignment partitionStateAssignment =
              mappingCalculator.computeBestPossiblePartitionState(cache, idealState, resource,
                  currentStateOutput);
          for (Partition partition : resource.getPartitions()) {
            Map<String, String> newStateMap = partitionStateAssignment.getReplicaMap(partition);
            output.setState(resourceName, partition, newStateMap);
          }
        } catch (Exception e) {
          logger
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    if (idealStates != null && idealStates.size() > 0) {
      for (IdealState idealState : idealStates.values()) {
        Set<String> partitionSet = idealState.getPartitionSet();
        String resourceName = idealState.getResourceName();
        if (!resourceMap.containsKey(resourceName)) {
          Resource resource = new Resource(resourceName);
          resourceMap.put(resourceName, resource);
          resource.setStateModelDefRef(idealState.getStateModelDefRef());
          resource.setStateModelFactoryName(idealState.getStateModelFactoryName());
          resource.setBucketSize(idealState.getBucketSize());
          resource.setBatchMessageMode(idealState.getBatchMessageMode());
        }

        for (String partition : partitionSet) {
          addPartition(partition, resourceName, resourceMap);
        }
      }
    }

    // It's important to get partitions from CurrentState as well since the
    // idealState might be removed.
    Map<String, LiveInstance> availableInstances = cache.getLiveInstances();

    if (availableInstances != null && availableInstances.size() > 0) {
      for (LiveInstance instance : availableInstances.values()) {
        String instanceName = instance.getInstanceName();
        String clientSessionId = instance.getSessionId();

        Map<String, CurrentState> currentStateMap =
            cache.getCurrentState(instanceName, clientSessionId);
        if (currentStateMap == null || currentStateMap.size() == 0) {
          continue;
        }
        for (CurrentState currentState : currentStateMap.values()) {

          String resourceName = currentState.getResourceName();
          Map<String, String> resourceStateMap = currentState.getPartitionStateMap();

          if (resourceStateMap.keySet().isEmpty()) {
            // don't include empty current state for dropped resource
            continue;
          }

          // don't overwrite ideal state settings
          if (!resourceMap.containsKey(resourceName)) {
            addResource(resourceName, resourceMap);
            Resource resource = resourceMap.get(resourceName);
            resource.setStateModelDefRef(currentState.getStateModelDefRef());
            resource.setStateModelFactoryName(currentState.getStateModelFactoryName());
            resource.setBucketSize(currentState.getBucketSize());
            resource.setBatchMessageMode(currentState.getBatchMessageMode());
          }

          if (currentState.getStateModelDefRef() == null) {
            LOG.error("state model def is null." + "resource:" + currentState.getResourceName()
                + ", partitions: " + currentState.getPartitionStateMap().keySet() + ", states: "
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  private void addResource(String resource, Map<String, Resource> resourceMap) {
    if (resource == null || resourceMap == null) {
      return;
    }
    if (!resourceMap.containsKey(resource)) {
      resourceMap.put(resource, new Resource(resource));
    }
  }
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Related Classes of org.apache.helix.model.Resource

  • org.apache.helix.controller.stages.BaseStageTest
  • org.apache.helix.controller.stages.BestPossibleStateCalcStage
  • org.apache.helix.controller.stages.CurrentStateComputationStage
  • org.apache.helix.controller.stages.ExternalViewComputeStage
  • org.apache.helix.controller.stages.MessageGenerationPhase
  • org.apache.helix.controller.stages.MessageSelectionStage
  • org.apache.helix.controller.stages.MessageThrottleStage
  • org.apache.helix.controller.stages.ResourceComputationStage
  • org.apache.helix.controller.stages.TaskAssignmentStage
  • org.apache.helix.monitoring.mbeans.TestClusterStatusMonitor
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