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 extends TransitionXCommand<Void> {
026
027    public KillTransitionXCommand(String name, String type, int priority) {
028        super(name, type, priority);
029    }
030
031    public abstract void killChildren() throws CommandException;
032
033    /* (non-Javadoc)
034     * @see org.apache.oozie.command.TransitionXCommand#transitToNext()
035     */
036    @Override
037    public final void transitToNext() {
038        if (job == null) {
039            job = this.getJob();
040        }
041        job.setStatus(Job.Status.KILLED);
042        job.setPending();
043    }
044
045    /* (non-Javadoc)
046     * @see org.apache.oozie.command.TransitionXCommand#execute()
047     */
048    @Override
049    protected Void execute() throws CommandException {
050        try {
051            transitToNext();
052            killChildren();
053            updateJob();
054            performWrites();
055        }
056        finally {
057            notifyParent();
058        }
059        return null;
060    }
061}