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.ErrorCode; 023 import org.apache.oozie.SLAEventBean; 024 025 /** 026 * Load the list of SLAEventBean for a seqId and return the list. 027 */ 028 public class SLAEventsGetForSeqIdJPAExecutor implements JPAExecutor<List<SLAEventBean>> { 029 030 private long seqId = 0; 031 private int limitLen = 100; // Default 032 private long[] lastSeqId; 033 034 public SLAEventsGetForSeqIdJPAExecutor(long seqId, int limitLen, long[] lastSeqId) { 035 this.seqId = seqId; 036 this.limitLen = limitLen; 037 this.lastSeqId = lastSeqId; 038 this.lastSeqId[0] = seqId; 039 } 040 041 @Override 042 public String getName() { 043 return "SLAEventsGetForSeqIdJPAExecutor"; 044 } 045 046 @Override 047 @SuppressWarnings("unchecked") 048 public List<SLAEventBean> execute(EntityManager em) throws JPAExecutorException { 049 List<SLAEventBean> seBeans; 050 try { 051 Query q = em.createNamedQuery("GET_SLA_EVENT_NEWER_SEQ_LIMITED"); 052 q.setParameter("id", seqId); 053 q.setMaxResults(limitLen); 054 seBeans = q.getResultList(); 055 for (SLAEventBean j : seBeans) { 056 lastSeqId[0] = Math.max(lastSeqId[0], j.getEvent_id()); 057 } 058 } 059 catch (Exception e) { 060 throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e); 061 } 062 return seBeans; 063 } 064 065 }