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    public abstract class ResumeTransitionXCommand extends TransitionXCommand<Void> {
023    
024        /**
025         * Resume all children of the job
026         *
027         * @throws CommandException
028         */
029        public abstract void resumeChildren() throws CommandException;
030    
031        public ResumeTransitionXCommand(String name, String type, int priority) {
032            super(name, type, priority);
033        }
034    
035        public ResumeTransitionXCommand(String name, String type, int priority, boolean dryrun) {
036            super(name, type, priority, dryrun);
037        }
038    
039        /**
040         * Transit job to PREP from PREPSUSPENDED or to RUNNING from SUSPENDED.
041         *
042         * @see org.apache.oozie.command.TransitionXCommand#transitToNext()
043         */
044        @Override
045        public void transitToNext() {
046            if (job == null) {
047                job = this.getJob();
048            }
049            if (job.getStatus() == Job.Status.PREPSUSPENDED) {
050                job.setStatus(Job.Status.PREP);
051            }
052            else if (job.getStatus() == Job.Status.SUSPENDED) {
053                job.setStatus(Job.Status.RUNNING);
054            }
055            else if (job.getStatus() == Job.Status.SUSPENDEDWITHERROR) {
056                job.setStatus(Job.Status.RUNNINGWITHERROR);
057            }
058            job.setPending();
059        }
060    
061        /* (non-Javadoc)
062         * @see org.apache.oozie.command.XCommand#execute()
063         */
064        @Override
065        protected Void execute() throws CommandException {
066            transitToNext();
067            try {
068                resumeChildren();
069                updateJob();
070                performWrites();
071            } finally {
072                notifyParent();
073            }
074            return null;
075        }
076    }