001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.oozie.command; 019 020import org.apache.oozie.client.Job; 021 022/** 023 * This is transition Base commands for all the jobs. 024 */ 025public abstract class KillTransitionXCommand<T> extends TransitionXCommand<T> { 026 protected T ret; 027 028 public KillTransitionXCommand(String name, String type, int priority) { 029 super(name, type, priority); 030 } 031 032 public abstract void killChildren() throws CommandException; 033 034 /* (non-Javadoc) 035 * @see org.apache.oozie.command.TransitionXCommand#transitToNext() 036 */ 037 @Override 038 public void transitToNext() { 039 if (job == null) { 040 job = this.getJob(); 041 } 042 job.setStatus(Job.Status.KILLED); 043 job.setPending(); 044 } 045 046 /* (non-Javadoc) 047 * @see org.apache.oozie.command.TransitionXCommand#execute() 048 */ 049 @Override 050 protected T execute() throws CommandException { 051 try { 052 transitToNext(); 053 killChildren(); 054 updateJob(); 055 performWrites(); 056 } 057 finally { 058 notifyParent(); 059 } 060 return ret; 061 } 062}