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 javax.persistence.EntityManager;
021import javax.persistence.Query;
022
023import org.apache.oozie.ErrorCode;
024import org.apache.oozie.util.ParamChecker;
025
026/**
027 * Load the number of running actions for a coordinator job. 
028 */
029public class CoordJobGetRunningActionsCountJPAExecutor implements JPAExecutor<Integer> {
030
031    private String coordJobId = null;
032
033    public CoordJobGetRunningActionsCountJPAExecutor(String coordJobId) {
034        ParamChecker.notNull(coordJobId, "coordJobId");
035        this.coordJobId = coordJobId;
036    }
037
038    @Override
039    public String getName() {
040        return "CoordJobGetRunningActionsCountJPAExecutor";
041    }
042
043    @Override
044    public Integer execute(EntityManager em) throws JPAExecutorException {
045        try {
046            Query q = em.createNamedQuery("GET_COORD_RUNNING_ACTIONS_COUNT");
047
048            q.setParameter("jobId", coordJobId);
049            Long count = (Long) q.getSingleResult();
050            return Integer.valueOf(count.intValue());
051        }
052        catch (Exception e) {
053            throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
054        }
055    }
056
057}