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 and return the list. 027 */ 028 public class SLAEventsGetJPAExecutor implements JPAExecutor<List<SLAEventBean>> { 029 030 private int limitLen = 100; // Default 031 032 public SLAEventsGetJPAExecutor() { 033 } 034 035 @Override 036 public String getName() { 037 return "SLAEventsGetJPAExecutor"; 038 } 039 040 @Override 041 @SuppressWarnings("unchecked") 042 public List<SLAEventBean> execute(EntityManager em) throws JPAExecutorException { 043 List<SLAEventBean> seBeans; 044 try { 045 Query q = em.createNamedQuery("GET_SLA_EVENTS"); 046 q.setMaxResults(limitLen); 047 seBeans = q.getResultList(); 048 } 049 catch (Exception e) { 050 throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e); 051 } 052 return seBeans; 053 } 054 055 }