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    
022    import javax.persistence.EntityManager;
023    import javax.persistence.Query;
024    
025    import org.apache.oozie.ErrorCode;
026    
027    /**
028     * Count the number of Workflow children of a parent Workflow or Coordinator that are not ready to be purged
029     */
030    public class WorkflowJobsCountNotForPurgeFromParentIdJPAExecutor implements JPAExecutor<Long> {
031    
032        private static final long DAY_IN_MS = 24 * 60 * 60 * 1000;
033        private long olderThanDays;
034        private String parentId;
035    
036        public WorkflowJobsCountNotForPurgeFromParentIdJPAExecutor(long olderThanDays, String parentId) {
037            this.olderThanDays = olderThanDays;
038            this.parentId = parentId;
039        }
040    
041        /* (non-Javadoc)
042         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
043         */
044        @Override
045        public String getName() {
046            return "WorkflowChildrenCountNotForPurgeJPAExecutor";
047        }
048    
049        /* (non-Javadoc)
050         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
051         */
052        @Override
053        @SuppressWarnings("unchecked")
054        public Long execute(EntityManager em) throws JPAExecutorException {
055            Long count = 0L;
056            try {
057                Timestamp maxEndTime = new Timestamp(System.currentTimeMillis() - (olderThanDays * DAY_IN_MS));
058                Query jobQ = em.createNamedQuery("GET_WORKFLOWS_COUNT_WITH_PARENT_ID_NOT_READY_FOR_PURGE");
059                jobQ.setParameter("parentId", parentId);
060                jobQ.setParameter("endTime", maxEndTime);
061                count = (Long) jobQ.getSingleResult();
062            }
063            catch (Exception e) {
064                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
065            }
066            return count;
067        }
068    
069    }