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.executor.jpa;
016    
017    import javax.persistence.EntityManager;
018    
019    import org.apache.oozie.WorkflowActionBean;
020    import org.apache.oozie.util.ParamChecker;
021    
022    public class WorkflowActionDeleteJPAExecutor implements JPAExecutor<Void> {
023    
024        private final String wfActionId;
025    
026        /**
027         * @param wfActionId
028         */
029        public WorkflowActionDeleteJPAExecutor(String wfActionId) {
030            ParamChecker.notEmpty(wfActionId, "ActionID");
031            this.wfActionId = wfActionId;
032        }
033    
034        /* (non-Javadoc)
035         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
036         */
037        @Override
038        public Void execute(EntityManager em) throws JPAExecutorException {
039            WorkflowActionBean action = em.find(WorkflowActionBean.class, this.wfActionId);
040            if (action != null) {
041                em.remove(action);
042            }
043            return null;
044        }
045    
046        /* (non-Javadoc)
047         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
048         */
049        @Override
050        public String getName() {
051            return "WorkflowActionDeleteJPAExecutor";
052        }
053    }