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
019package org.apache.oozie.executor.jpa;
020
021import java.util.List;
022
023import javax.persistence.EntityManager;
024import javax.persistence.Query;
025
026import org.apache.oozie.ErrorCode;
027import org.apache.oozie.WorkflowActionBean;
028import org.apache.oozie.util.ParamChecker;
029import org.apache.oozie.util.XLog;
030
031/**
032 * Load the WorkflowAction into a Bean and return it.
033 */
034public class WorkflowActionGetJPAExecutor implements JPAExecutor<WorkflowActionBean> {
035
036    public XLog LOG = XLog.getLog(getClass());
037
038    private String wfActionId = null;
039    private final boolean isNullAcceptable;
040
041    public WorkflowActionGetJPAExecutor(String wfActionId) {
042        this(wfActionId, false);
043    }
044
045    public WorkflowActionGetJPAExecutor(String wfActionId, boolean isNullAcceptable) {
046        ParamChecker.notNull(wfActionId, "wfActionId");
047        this.wfActionId = wfActionId;
048        this.isNullAcceptable = isNullAcceptable;
049    }
050
051    /* (non-Javadoc)
052     * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
053     */
054    @Override
055    public String getName() {
056        return "WorkflowActionGetJPAExecutor";
057    }
058
059    /* (non-Javadoc)
060     * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
061     */
062    @Override
063    @SuppressWarnings("unchecked")
064    public WorkflowActionBean execute(EntityManager em) throws JPAExecutorException {
065        List<WorkflowActionBean> waBeans;
066        try {
067            Query q = em.createNamedQuery("GET_ACTION");
068            q.setParameter("id", wfActionId);
069            waBeans = q.getResultList();
070        }
071        catch (Exception e) {
072            throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
073        }
074        WorkflowActionBean bean = null;
075        if (waBeans != null && waBeans.size() > 0) {
076            bean = waBeans.get(0);
077            return bean;
078        }
079        else {
080            if (isNullAcceptable) {
081                LOG.warn("Could not get workflow action {0}", wfActionId);
082                return null;
083            }
084            else {
085                throw new JPAExecutorException(ErrorCode.E0605, wfActionId);
086            }
087        }
088    }
089}