001    /**
002     * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
003     * Licensed under the Apache License, Version 2.0 (the "License");
004     * you may not use this file except in compliance with the License.
005     * You may obtain a copy of the License at
006     *
007     *   http://www.apache.org/licenses/LICENSE-2.0
008     *
009     *  Unless required by applicable law or agreed to in writing, software
010     *  distributed under the License is distributed on an "AS IS" BASIS,
011     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012     *  See the License for the specific language governing permissions and
013     *  limitations under the License. See accompanying LICENSE file.
014     */
015    package org.apache.oozie.command.wf;
016    
017    
018    import org.apache.oozie.ErrorCode;
019    import org.apache.oozie.WorkflowActionBean;
020    import org.apache.oozie.command.CommandException;
021    import org.apache.oozie.executor.jpa.JPAExecutorException;
022    import org.apache.oozie.executor.jpa.WorkflowActionGetJPAExecutor;
023    import org.apache.oozie.util.ParamChecker;
024    import org.apache.oozie.service.JPAService;
025    import org.apache.oozie.service.Services;
026    
027    public class WorkflowActionInfoXCommand extends WorkflowXCommand<WorkflowActionBean> {
028        private String id;
029    
030        public WorkflowActionInfoXCommand(String id) {
031            super("action.info", "action.info", 1);
032            this.id = ParamChecker.notEmpty(id, "id");
033            LOG.debug("Command for workflow action " + id);
034        }
035    
036        @Override
037        protected WorkflowActionBean execute() throws CommandException {
038            JPAService jpaService = Services.get().get(JPAService.class);
039            if (jpaService != null) {
040                WorkflowActionBean action;
041                try {
042                    action = jpaService.execute(new WorkflowActionGetJPAExecutor(this.id));
043                }
044                catch (JPAExecutorException ex) {
045                    throw new CommandException(ex);
046                }
047                return action;
048            }
049            else {
050                LOG.error(ErrorCode.E0610);
051                return null;
052            }
053        }
054    
055        /* (non-Javadoc)
056         * @see org.apache.oozie.command.XCommand#getEntityKey()
057         */
058        @Override
059        protected String getEntityKey() {
060            return null;
061        }
062    
063        /* (non-Javadoc)
064         * @see org.apache.oozie.command.XCommand#loadState()
065         */
066        @Override
067        protected void loadState() {
068    
069        }
070    
071        /* (non-Javadoc)
072         * @see org.apache.oozie.command.XCommand#verifyPrecondition()
073         */
074        @Override
075        protected void verifyPrecondition() throws CommandException {
076    
077        }
078    
079        @Override
080        protected boolean isLockRequired() {
081            return false;
082        }
083    
084    }