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 java.util.List; 018 019 import javax.persistence.EntityManager; 020 import javax.persistence.Query; 021 022 import org.apache.oozie.util.ParamChecker; 023 024 /** 025 * Get the Workflow ID with given external ID which will be assigned for the subworkflows. 026 */ 027 public class WorkflowIdGetForExternalIdJPAExecutor implements JPAExecutor<String> { 028 029 private String externalId = null; 030 031 public WorkflowIdGetForExternalIdJPAExecutor(String externalId) { 032 ParamChecker.notNull(externalId, "externalId"); 033 this.externalId = externalId; 034 } 035 036 /* (non-Javadoc) 037 * @see org.apache.oozie.executor.jpa.JPAExecutor#getName() 038 */ 039 @Override 040 public String getName() { 041 return "WorkflowIdGetForExternalIdJPAExecutor"; 042 } 043 044 /* (non-Javadoc) 045 * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager) 046 */ 047 @Override 048 @SuppressWarnings("unchecked") 049 public String execute(EntityManager em) throws JPAExecutorException { 050 String id = ""; 051 Query q = em.createNamedQuery("GET_WORKFLOW_ID_FOR_EXTERNAL_ID"); 052 q.setParameter("externalId", externalId); 053 List<String> w = q.getResultList(); 054 if (w.size() > 0) { 055 int index = w.size() - 1; 056 id = w.get(index); 057 } 058 return id; 059 } 060 }