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     */
018    package org.apache.oozie.command;
019    
020    import org.apache.oozie.client.Job;
021    
022    /**
023     * This is transition Base commands for all the jobs.
024     */
025    public 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    }