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 */
018package org.apache.oozie.executor.jpa;
019
020import java.util.List;
021
022import javax.persistence.EntityManager;
023import javax.persistence.Query;
024
025import org.apache.oozie.util.ParamChecker;
026
027/**
028 * Get the Workflow ID with given external ID which will be assigned for the subworkflows.
029 */
030public 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}