001    /**
002     * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
003     * Licensed under the Apache License, Version 2.0 (the "License");
004     * you may not use this file except in compliance with the License.
005     * You may obtain a copy of the License at
006     *
007     *   http://www.apache.org/licenses/LICENSE-2.0
008     *
009     *  Unless required by applicable law or agreed to in writing, software
010     *  distributed under the License is distributed on an "AS IS" BASIS,
011     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012     *  See the License for the specific language governing permissions and
013     *  limitations under the License. See accompanying LICENSE file.
014     */
015    package org.apache.oozie.executor.jpa;
016    
017    import javax.persistence.EntityManager;
018    import javax.persistence.Query;
019    
020    import org.apache.oozie.ErrorCode;
021    import org.apache.oozie.util.ParamChecker;
022    
023    /**
024     * Load the number of running actions for a coordinator job. 
025     */
026    public class CoordJobGetRunningActionsCountJPAExecutor implements JPAExecutor<Integer> {
027    
028        private String coordJobId = null;
029    
030        public CoordJobGetRunningActionsCountJPAExecutor(String coordJobId) {
031            ParamChecker.notNull(coordJobId, "coordJobId");
032            this.coordJobId = coordJobId;
033        }
034    
035        @Override
036        public String getName() {
037            return "CoordJobGetRunningActionsCountJPAExecutor";
038        }
039    
040        @Override
041        public Integer execute(EntityManager em) throws JPAExecutorException {
042            try {
043                Query q = em.createNamedQuery("GET_COORD_RUNNING_ACTIONS_COUNT");
044    
045                q.setParameter("jobId", coordJobId);
046                Long count = (Long) q.getSingleResult();
047                return Integer.valueOf(count.intValue());
048            }
049            catch (Exception e) {
050                throw new JPAExecutorException(ErrorCode.E0603, e);
051            }
052        }
053    
054    }