| 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.HelixException; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * A named queue to which jobs can be added |
| */ |
| public class JobQueue extends Workflow { |
| |
| private JobQueue(String name, WorkflowConfig workflowConfig, |
| Map<String, Map<String, String>> jobConfigs, Map<String, List<TaskConfig>> taskConfigs) { |
| super(name, workflowConfig, jobConfigs, taskConfigs); |
| } |
| |
| /** |
| * Determine the number of jobs that this queue can accept before rejecting further jobs |
| * This method is deprecated, please use: |
| * JobQueue.getWorkflowConfig().getCapacity(); |
| * @return queue capacity |
| */ |
| @Deprecated |
| public int getCapacity() { |
| return _workflowConfig.getCapacity(); |
| } |
| |
| /** Supports creation of a single queue */ |
| public static class Builder extends Workflow.Builder { |
| private List<String> jobs; |
| |
| public Builder(String name) { |
| super(name); |
| jobs = new ArrayList<String>(); |
| } |
| |
| /** |
| * Do not use this method, use workflowConfigBuilder.setCapacity() instead. |
| * If you set capacity via this method, the number given here |
| * will override capacity number set from other places. |
| * @param capacity |
| * @return |
| */ |
| @Override |
| public Builder setCapacity(int capacity) { |
| super.setCapacity(capacity); |
| return this; |
| } |
| |
| public Builder enqueueJob(final String job, JobConfig.Builder jobBuilder) { |
| if (_workflowConfigBuilder != null) { |
| if (jobs.size() >= _workflowConfigBuilder.getCapacity()) { |
| throw new HelixException("Failed to push new job to jobQueue, it is already full"); |
| } |
| } |
| |
| addJob(job, jobBuilder); |
| if (jobs.size() > 0) { |
| String previousJob = jobs.get(jobs.size() - 1); |
| addParentChildDependency(previousJob, job); |
| } |
| jobs.add(job); |
| return this; |
| } |
| |
| /** |
| * Please use setWorkflowConfigMap() instead. |
| * @param workflowCfgMap |
| * @return |
| */ |
| @Override |
| public Builder fromMap(Map<String, String> workflowCfgMap) { |
| return setWorkflowConfigMap(workflowCfgMap); |
| } |
| |
| @Override |
| public Builder setWorkflowConfigMap(Map<String, String> workflowCfgMap) { |
| super.setWorkflowConfigMap(workflowCfgMap); |
| return this; |
| } |
| |
| @Override |
| public Builder setWorkflowConfig(WorkflowConfig workflowConfig) { |
| super.setWorkflowConfig(workflowConfig); |
| return this; |
| } |
| |
| @Override |
| public Builder setScheduleConfig(ScheduleConfig scheduleConfig) { |
| super.setScheduleConfig(scheduleConfig); |
| return this; |
| } |
| |
| @Override |
| public Builder setExpiry(long expiry) { |
| super.setExpiry(expiry); |
| return this; |
| } |
| |
| @Override |
| public JobQueue build() { |
| buildConfig(); |
| _workflowConfigBuilder.setTerminable(false); |
| _workflowConfigBuilder.setJobQueue(true); |
| return new JobQueue(_name, _workflowConfigBuilder.build(), _jobConfigs, _taskConfigs); |
| } |
| } |
| } |