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 java.util.List;
021    
022    import javax.persistence.EntityManager;
023    import javax.persistence.Query;
024    
025    import org.apache.oozie.CoordinatorActionBean;
026    import org.apache.oozie.ErrorCode;
027    import org.apache.oozie.util.ParamChecker;
028    
029    /**
030     * Load coordinator action by externalId.
031     */
032    public class CoordActionGetForExternalIdJPAExecutor implements JPAExecutor<CoordinatorActionBean> {
033    
034        private String externalId = null;
035    
036        public CoordActionGetForExternalIdJPAExecutor(String externalId) {
037            ParamChecker.notNull(externalId, "externalId");
038            this.externalId = externalId;
039        }
040    
041        /* (non-Javadoc)
042         * @see org.apache.oozie.executor.jpa.JPAExecutor#getName()
043         */
044        @Override
045        public String getName() {
046            return "CoordActionGetForExternalIdJPAExecutor";
047        }
048    
049        /* (non-Javadoc)
050         * @see org.apache.oozie.executor.jpa.JPAExecutor#execute(javax.persistence.EntityManager)
051         */
052        @Override
053        @SuppressWarnings("unchecked")
054        public CoordinatorActionBean execute(EntityManager em) throws JPAExecutorException {
055            try {
056                CoordinatorActionBean caBean = null;
057                Query q = em.createNamedQuery("GET_COORD_ACTION_FOR_EXTERNALID");
058                q.setParameter("externalId", externalId);
059                List<CoordinatorActionBean> actionList = q.getResultList();
060                if (actionList.size() > 0) {
061                    caBean = actionList.get(0);
062                }
063                return caBean;
064            }
065            catch (Exception e) {
066                throw new JPAExecutorException(ErrorCode.E0603, e);
067            }
068        }
069    
070    }