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    import org.apache.oozie.WorkflowJobBean;
028    
029    /**
030     * Load the list of completed WorkflowJob for purge ready.
031     */
032    public class WorkflowJobsGetForPurgeJPAExecutor implements JPAExecutor<List<WorkflowJobBean>> {
033    
034        private static final long DAY_IN_MS = 24 * 60 * 60 * 1000;
035        private long olderThanDays;
036        private int limit;
037    
038        public WorkflowJobsGetForPurgeJPAExecutor(long olderThanDays, int limit) {
039            this.olderThanDays = olderThanDays;
040            this.limit = limit;
041        }
042    
043        /* (non-Javadoc)
044         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
045         */
046        @Override
047        public String getName() {
048            return "WorkflowJobsGetForPurgeJPAExecutor";
049        }
050    
051        /* (non-Javadoc)
052         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
053         */
054        @Override
055        @SuppressWarnings("unchecked")
056        public List<WorkflowJobBean> execute(EntityManager em) throws JPAExecutorException {
057            List<WorkflowJobBean> workflows = null;
058            try {
059                Timestamp maxEndTime = new Timestamp(System.currentTimeMillis() - (olderThanDays * DAY_IN_MS));
060                Query jobQ = em.createNamedQuery("GET_COMPLETED_WORKFLOWS_OLDER_THAN");
061                jobQ.setParameter("endTime", maxEndTime);
062                jobQ.setMaxResults(limit);
063                workflows = jobQ.getResultList();
064            }
065            catch (Exception e) {
066                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
067            }
068            return workflows;
069        }
070    
071    }