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
019package org.apache.oozie.executor.jpa;
020
021import java.util.List;
022
023import javax.persistence.EntityManager;
024import javax.persistence.Query;
025
026import org.apache.oozie.util.ParamChecker;
027
028/**
029 * Get the Workflow ID with given external ID which will be assigned for the subworkflows.
030 */
031public class WorkflowIdGetForExternalIdJPAExecutor implements JPAExecutor<String> {
032
033    private String externalId = null;
034
035    public WorkflowIdGetForExternalIdJPAExecutor(String externalId) {
036        ParamChecker.notNull(externalId, "externalId");
037        this.externalId = externalId;
038    }
039
040    /* (non-Javadoc)
041     * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
042     */
043    @Override
044    public String getName() {
045        return "WorkflowIdGetForExternalIdJPAExecutor";
046    }
047
048    /* (non-Javadoc)
049     * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
050     */
051    @Override
052    @SuppressWarnings("unchecked")
053    public String execute(EntityManager em) throws JPAExecutorException {
054        String id = "";
055        Query q = em.createNamedQuery("GET_WORKFLOW_ID_FOR_EXTERNAL_ID");
056        q.setParameter("externalId", externalId);
057        List<String> w = q.getResultList();
058        if (w.size() > 0) {
059            int index = w.size() - 1;
060            id = w.get(index);
061        }
062        return id;
063    }
064}