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}