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.wf;
019    
020    import org.apache.oozie.ErrorCode;
021    import org.apache.oozie.WorkflowJobBean;
022    import org.apache.oozie.XException;
023    import org.apache.oozie.command.CommandException;
024    import org.apache.oozie.command.PreconditionException;
025    import org.apache.oozie.executor.jpa.WorkflowJobGetJPAExecutor;
026    import org.apache.oozie.service.JPAService;
027    import org.apache.oozie.service.Services;
028    import org.apache.oozie.util.LogUtils;
029    import org.apache.oozie.util.ParamChecker;
030    
031    public class DefinitionXCommand extends WorkflowXCommand<String> {
032        private String jobId;
033        private WorkflowJobBean wfJob;
034    
035        public DefinitionXCommand(String jobId) {
036            super("definition", "definition", 1);
037            this.jobId = ParamChecker.notEmpty(jobId, "jobId");
038        }
039    
040        @Override
041        protected boolean isLockRequired() {
042            return false;
043        }
044    
045        @Override
046        public String getEntityKey() {
047            return this.jobId;
048        }
049    
050        @Override
051        protected void loadState() throws CommandException {
052            try {
053                JPAService jpaService = Services.get().get(JPAService.class);
054    
055                if (jpaService != null) {
056                    this.wfJob = jpaService.execute(new WorkflowJobGetJPAExecutor(jobId));
057                    LogUtils.setLogInfo(wfJob, logInfo);
058                }
059                else {
060                    LOG.error(ErrorCode.E0610);
061                }
062            }
063            catch (XException ex) {
064                throw new CommandException(ex);
065            }
066        }
067    
068        @Override
069        protected void verifyPrecondition() throws CommandException, PreconditionException {
070        }
071    
072        @Override
073        protected String execute() throws CommandException {
074            if (wfJob != null) {
075                return wfJob.getWorkflowInstance().getApp().getDefinition();
076            }
077            else {
078                throw new CommandException(ErrorCode.E0604);
079            }
080        }
081    
082    }