| package org.apache.helix.task; |
| |
| /* |
| * 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 org.apache.helix.controller.dataproviders.WorkflowControllerDataProvider; |
| import org.apache.helix.controller.stages.CurrentStateOutput; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.Resource; |
| import org.apache.helix.model.ResourceAssignment; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Custom rebalancer implementation for the {@code Job} in task model. |
| */ |
| public class JobRebalancer extends TaskRebalancer { |
| private static final Logger LOG = LoggerFactory.getLogger(JobRebalancer.class); |
| private JobDispatcher _jobDispatcher; |
| |
| @Override |
| public ResourceAssignment computeBestPossiblePartitionState( |
| WorkflowControllerDataProvider clusterData, IdealState taskIs, Resource resource, |
| CurrentStateOutput currStateOutput) { |
| long startTime = System.currentTimeMillis(); |
| final String jobName = resource.getResourceName(); |
| JobConfig jobConfig = clusterData.getJobConfig(jobName); |
| if (jobConfig == null) { |
| LOG.error( |
| "Job {}'s JobConfig is missing. This job might have been deleted or purged. Skipping status update and assignment!", |
| jobName); |
| return buildEmptyAssignment(jobName, currStateOutput); |
| } |
| LOG.debug("Computer Best Partition for job: {}.", jobName); |
| if (_jobDispatcher == null) { |
| _jobDispatcher = new JobDispatcher(); |
| } |
| _jobDispatcher.init(_manager); |
| _jobDispatcher.updateCache(clusterData); |
| _jobDispatcher.setClusterStatusMonitor(_clusterStatusMonitor); |
| ResourceAssignment resourceAssignment = _jobDispatcher.processJobStatusUpdateAndAssignment( |
| jobName, currStateOutput, clusterData.getWorkflowContext(jobConfig.getWorkflow())); |
| LOG.debug("JobRebalancer computation takes {} ms for Job {}", |
| System.currentTimeMillis() - startTime, jobName); |
| return resourceAssignment; |
| } |
| } |