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 for a seqId and return the list.
030     */
031    public class SLAEventsGetForSeqIdJPAExecutor implements JPAExecutor<List<SLAEventBean>> {
032    
033        private long seqId = 0;
034        private int limitLen = 100; // Default
035        private long[] lastSeqId;
036    
037        public SLAEventsGetForSeqIdJPAExecutor(long seqId, int limitLen, long[] lastSeqId) {
038            this.seqId = seqId;
039            this.limitLen = limitLen;
040            this.lastSeqId = lastSeqId;
041            this.lastSeqId[0] = seqId;
042        }
043    
044        @Override
045        public String getName() {
046            return "SLAEventsGetForSeqIdJPAExecutor";
047        }
048    
049        @Override
050        @SuppressWarnings("unchecked")
051        public List<SLAEventBean> execute(EntityManager em) throws JPAExecutorException {
052            List<SLAEventBean> seBeans;
053            try {
054                Query q = em.createNamedQuery("GET_SLA_EVENT_NEWER_SEQ_LIMITED");
055                q.setParameter("id", seqId);
056                q.setMaxResults(limitLen);
057                seBeans = q.getResultList();
058                for (SLAEventBean j : seBeans) {
059                    lastSeqId[0] = Math.max(lastSeqId[0], j.getEvent_id());
060                }
061            }
062            catch (Exception e) {
063                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
064            }
065            return seBeans;
066        }
067    
068    }