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.sql.Timestamp;
021    import java.util.List;
022    
023    import javax.persistence.EntityManager;
024    import javax.persistence.Query;
025    
026    import org.apache.oozie.ErrorCode;
027    
028    /**
029     * Load the list of completed CoordinatorJob for purge ready.
030     */
031    public class CoordJobsGetForPurgeJPAExecutor implements JPAExecutor<List<String>> {
032    
033        private static final long DAY_IN_MS = 24 * 60 * 60 * 1000;
034        private long olderThanDays;
035        private int limit;
036        private int offset;
037    
038        public CoordJobsGetForPurgeJPAExecutor(long olderThanDays, int limit) {
039            this(olderThanDays, 0, limit);
040        }
041    
042        public CoordJobsGetForPurgeJPAExecutor(long olderThanDays, int offset, int limit) {
043            this.olderThanDays = olderThanDays;
044            this.offset = offset;
045            this.limit = limit;
046        }
047    
048        @Override
049        public String getName() {
050            return "CoordJobsGetForPurgeJPAExecutor";
051        }
052    
053        @Override
054        @SuppressWarnings("unchecked")
055        public List<String> execute(EntityManager em) throws JPAExecutorException {
056            List<String> coordJobs = null;
057            try {
058                Timestamp lastModTm = new Timestamp(System.currentTimeMillis() - (olderThanDays * DAY_IN_MS));
059                Query jobQ = em.createNamedQuery("GET_COMPLETED_COORD_JOBS_WITH_NO_PARENT_OLDER_THAN_STATUS");
060                jobQ.setParameter("lastModTime", lastModTm);
061                jobQ.setMaxResults(limit);
062                jobQ.setFirstResult(offset);
063                coordJobs = jobQ.getResultList();
064            }
065            catch (Exception e) {
066                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
067            }
068            return coordJobs;
069        }
070    
071    }