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.util.ParamChecker;
026    
027    /**
028     * Get the Workflow ID with given external ID which will be assigned for the subworkflows.
029     */
030    public class WorkflowIdGetForExternalIdJPAExecutor implements JPAExecutor<String> {
031    
032        private String externalId = null;
033    
034        public WorkflowIdGetForExternalIdJPAExecutor(String externalId) {
035            ParamChecker.notNull(externalId, "externalId");
036            this.externalId = externalId;
037        }
038    
039        /* (non-Javadoc)
040         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
041         */
042        @Override
043        public String getName() {
044            return "WorkflowIdGetForExternalIdJPAExecutor";
045        }
046    
047        /* (non-Javadoc)
048         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
049         */
050        @Override
051        @SuppressWarnings("unchecked")
052        public String execute(EntityManager em) throws JPAExecutorException {
053            String id = "";
054            Query q = em.createNamedQuery("GET_WORKFLOW_ID_FOR_EXTERNAL_ID");
055            q.setParameter("externalId", externalId);
056            List<String> w = q.getResultList();
057            if (w.size() > 0) {
058                int index = w.size() - 1;
059                id = w.get(index);
060            }
061            return id;
062        }
063    }