| package org.apache.helix.controller.stages; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.helix.controller.dataproviders.ResourceControllerDataProvider; |
| import org.apache.helix.controller.pipeline.AbstractBaseStage; |
| import org.apache.helix.controller.pipeline.StageException; |
| import org.apache.helix.model.CustomizedState; |
| import org.apache.helix.model.LiveInstance; |
| import org.apache.helix.model.Partition; |
| import org.apache.helix.model.Resource; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class CustomizedStateComputationStage extends AbstractBaseStage { |
| private static Logger LOG = LoggerFactory.getLogger(CustomizedStateComputationStage.class); |
| |
| @Override |
| public void process(ClusterEvent event) throws Exception { |
| _eventId = event.getEventId(); |
| ResourceControllerDataProvider cache = |
| event.getAttribute(AttributeName.ControllerDataProvider.name()); |
| final Map<String, Resource> resourceMap = |
| event.getAttribute(AttributeName.RESOURCES_TO_REBALANCE.name()); |
| Set<String> aggregationEnabledTypes = cache.getAggregationEnabledCustomizedStateTypes(); |
| |
| if (cache == null || resourceMap == null) { |
| throw new StageException( |
| "Missing attributes in event:" + event + ". Requires DataCache|RESOURCE"); |
| } |
| |
| Map<String, LiveInstance> liveInstances = cache.getLiveInstances(); |
| final CustomizedStateOutput customizedStateOutput = new CustomizedStateOutput(); |
| |
| for (LiveInstance instance : liveInstances.values()) { |
| String instanceName = instance.getInstanceName(); |
| // update customized states. |
| for (String customizedStateType : aggregationEnabledTypes) { |
| Map<String, CustomizedState> customizedStateMap = |
| cache.getCustomizedState(instanceName, customizedStateType); |
| updateCustomizedStates(instanceName, customizedStateType, customizedStateMap, |
| customizedStateOutput, resourceMap); |
| } |
| } |
| event.addAttribute(AttributeName.CUSTOMIZED_STATE.name(), customizedStateOutput); |
| } |
| |
| // update customized state in CustomizedStateOutput |
| private void updateCustomizedStates(String instanceName, String customizedStateType, |
| Map<String, CustomizedState> customizedStates, CustomizedStateOutput customizedStateOutput, |
| Map<String, Resource> resourceMap) { |
| // for each CustomizedState, update corresponding entry in CustomizedStateOutput |
| for (CustomizedState customizedState : customizedStates.values()) { |
| String resourceName = customizedState.getResourceName(); |
| Resource resource = resourceMap.get(resourceName); |
| if (resource == null) { |
| continue; |
| } |
| |
| Map<String, String> partitionStateMap = customizedState |
| .getPartitionStateMap(CustomizedState.CustomizedStateProperty.CURRENT_STATE); |
| for (String partitionName : partitionStateMap.keySet()) { |
| Partition partition = resource.getPartition(partitionName); |
| if (partition != null) { |
| customizedStateOutput |
| .setCustomizedState(customizedStateType, resourceName, partition, instanceName, |
| customizedState.getState(partitionName), |
| customizedState.getStartTime(partitionName)); |
| } |
| } |
| } |
| } |
| } |