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    
027    /**
028     * Load the list of WorkflowJob with the passed in parentId
029     */
030    public class WorkflowJobsGetFromParentIdJPAExecutor implements JPAExecutor<List<String>> {
031    
032        private String parentId;
033        private int limit;
034        private int offset;
035    
036        public WorkflowJobsGetFromParentIdJPAExecutor(String parentId, int limit) {
037            this(parentId, 0, limit);
038        }
039    
040        public WorkflowJobsGetFromParentIdJPAExecutor(String parentId, int offset, int limit) {
041            this.parentId = parentId;
042            this.offset = offset;
043            this.limit = limit;
044        }
045    
046        /* (non-Javadoc)
047         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
048         */
049        @Override
050        public String getName() {
051            return "WorkflowJobsGetFromParentIdJPAExecutor";
052        }
053    
054        /* (non-Javadoc)
055         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
056         */
057        @Override
058        @SuppressWarnings("unchecked")
059        public List<String> execute(EntityManager em) throws JPAExecutorException {
060            List<String> workflows = null;
061            try {
062                Query jobQ = em.createNamedQuery("GET_WORKFLOWS_WITH_PARENT_ID");
063                jobQ.setParameter("parentId", parentId);
064                jobQ.setMaxResults(limit);
065                jobQ.setFirstResult(offset);
066                workflows = jobQ.getResultList();
067            }
068            catch (Exception e) {
069                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
070            }
071            return workflows;
072        }
073    
074    }