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    package org.apache.oozie.executor.jpa;
019    
020    import javax.persistence.EntityManager;
021    import javax.persistence.Query;
022    
023    import org.apache.oozie.ErrorCode;
024    import org.apache.oozie.util.ParamChecker;
025    
026    /**
027     * Load the number of running actions for a coordinator job.
028     */
029    public class CoordActionsActiveCountJPAExecutor implements JPAExecutor<Integer> {
030    
031        private String coordJobId = null;
032    
033        public CoordActionsActiveCountJPAExecutor(String coordJobId) {
034            ParamChecker.notNull(coordJobId, "coordJobId");
035            this.coordJobId = coordJobId;
036        }
037    
038        @Override
039        public String getName() {
040            return "CoordActionsActiveCountJPAExecutor";
041        }
042    
043        @Override
044        public Integer execute(EntityManager em) throws JPAExecutorException {
045            try {
046                Query q = em.createNamedQuery("GET_COORD_ACTIVE_ACTIONS_COUNT_BY_JOBID");
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    }