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.ArrayList;
022import java.util.List;
023
024import javax.persistence.EntityManager;
025import javax.persistence.Query;
026
027import org.apache.oozie.CoordinatorJobBean;
028import org.apache.oozie.ErrorCode;
029
030/**
031 * Get a list of Coordinator Jobs that are in pending. The result is ordered by lastModifiedTimestamp.
032 */
033public class CoordJobsGetPendingJPAExecutor implements JPAExecutor<List<CoordinatorJobBean>> {
034    private int limit;
035
036    public CoordJobsGetPendingJPAExecutor(int limit) {
037        this.limit = limit;
038    }
039
040    /* (non-Javadoc)
041     * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
042     */
043    @Override
044    public String getName() {
045        return "CoordJobsGetPendingJPAExecutor";
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 List<CoordinatorJobBean> execute(EntityManager em) throws JPAExecutorException {
054        List<CoordinatorJobBean> coordBeans;
055        try {
056            Query q = em.createNamedQuery("GET_COORD_JOBS_PENDING");
057            if (limit > 0) {
058                q.setMaxResults(limit);
059            }
060            coordBeans = q.getResultList();
061        }
062        catch (Exception e) {
063            throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
064        }
065        return coordBeans;
066    }
067}