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.ArrayList; 018 import java.util.List; 019 020 import javax.persistence.EntityManager; 021 import javax.persistence.Query; 022 023 import org.apache.oozie.CoordinatorJobBean; 024 import org.apache.oozie.ErrorCode; 025 026 /** 027 * Get a list of Coordinator Jobs that are in pending. The result is ordered by lastModifiedTimestamp. 028 */ 029 public class CoordJobsGetPendingJPAExecutor implements JPAExecutor<List<CoordinatorJobBean>> { 030 private int limit; 031 032 public CoordJobsGetPendingJPAExecutor(int limit) { 033 this.limit = limit; 034 } 035 036 /* (non-Javadoc) 037 * @see org.apache.oozie.executor.jpa.JPAExecutor#getName() 038 */ 039 @Override 040 public String getName() { 041 return "CoordJobsGetPendingJPAExecutor"; 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 List<CoordinatorJobBean> execute(EntityManager em) throws JPAExecutorException { 050 List<CoordinatorJobBean> coordBeans; 051 List<CoordinatorJobBean> jobList = new ArrayList<CoordinatorJobBean>(); 052 try { 053 Query q = em.createNamedQuery("GET_COORD_JOBS_PENDING"); 054 if (limit > 0) { 055 q.setMaxResults(limit); 056 } 057 coordBeans = q.getResultList(); 058 for (CoordinatorJobBean j : coordBeans) { 059 jobList.add(j); 060 } 061 } 062 catch (Exception e) { 063 throw new JPAExecutorException(ErrorCode.E0603, e); 064 } 065 return jobList; 066 } 067 }