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.CoordinatorJobBean;
024    import org.apache.oozie.ErrorCode;
025    import org.apache.oozie.util.ParamChecker;
026    
027    /**
028     * DB query executor to fetch columns 'user' and 'appName' from Coordinator Job table
029     */
030    public class CoordinatorJobGetForUserAppnameJPAExecutor implements JPAExecutor<CoordinatorJobBean> {
031    
032        private String coordJobId = null;
033    
034        public CoordinatorJobGetForUserAppnameJPAExecutor(String coordJobId) {
035            ParamChecker.notNull(coordJobId, "coordJobId");
036            this.coordJobId = coordJobId;
037        }
038    
039        /*
040         * (non-Javadoc)
041         *
042         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
043         */
044        public String getName() {
045            return "CoordJobGetForUserAppnameJPAExecutor";
046        }
047    
048        /*
049         * (non-Javadoc)
050         *
051         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.
052         * EntityManager)
053         */
054        @Override
055        public CoordinatorJobBean execute(EntityManager em) throws JPAExecutorException {
056            try {
057                Query q = em.createNamedQuery("GET_COORD_JOB_FOR_USER_APPNAME");
058                q.setParameter("id", coordJobId);
059                Object[] arr = (Object[]) q.getSingleResult();
060                CoordinatorJobBean bean = new CoordinatorJobBean();
061                if (arr[0] != null) {
062                    bean.setUser((String) arr[0]);
063                }
064                if (arr[1] != null){
065                    bean.setAppName((String) arr[1]);
066                }
067                return bean;
068            }
069            catch (Exception e) {
070                throw new JPAExecutorException(ErrorCode.E0603, e.getMessage(), e);
071            }
072        }
073    
074    }