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    package org.apache.oozie.executor.jpa;
019    
020    import java.util.List;
021    
022    import javax.persistence.EntityManager;
023    import javax.persistence.Query;
024    
025    import org.apache.oozie.ErrorCode;
026    import org.apache.oozie.SLAEventBean;
027    
028    /**
029     * Load the list of SLAEventBean and return the list.
030     */
031    public class SLAEventsGetJPAExecutor implements JPAExecutor<List<SLAEventBean>> {
032    
033        private int limitLen = 100; // Default
034    
035        public SLAEventsGetJPAExecutor() {
036        }
037    
038        @Override
039        public String getName() {
040            return "SLAEventsGetJPAExecutor";
041        }
042    
043        @Override
044        @SuppressWarnings("unchecked")
045        public List<SLAEventBean> execute(EntityManager em) throws JPAExecutorException {
046            List<SLAEventBean> seBeans;
047            try {
048                Query q = em.createNamedQuery("GET_SLA_EVENTS");
049                q.setMaxResults(limitLen);
050                seBeans = q.getResultList();
051            }
052            catch (Exception e) {
053                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
054            }
055            return seBeans;
056        }
057    
058    }