/*

  * Copyright 2007-2008 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.ksb.messaging.dao.impl;

 import java.util.List;

 import java.util.Map;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import javax.persistence.Query;

 import javax.xml.namespace.QName;

 import org.kuali.rice.core.config.ConfigContext;

 import org.kuali.rice.core.jpa.criteria.Criteria;

 import org.kuali.rice.core.jpa.criteria.QueryByCriteria;

 import org.kuali.rice.core.util.OrmUtils;

 import org.kuali.rice.core.util.RiceUtilities;

 import org.kuali.rice.ksb.messaging.PersistedMessage;

 import org.kuali.rice.ksb.messaging.PersistedMessagePayload;

 import org.kuali.rice.ksb.messaging.dao.MessageQueueDAO;

 import org.kuali.rice.ksb.util.KSBConstants;

 public class MessageQueueDAOJpaImpl implements MessageQueueDAO {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(MessageQueueDAOJpaImpl.class);

     @PersistenceContext

     private EntityManager entityManager;

     @SuppressWarnings("unchecked")

     public List<PersistedMessage> findAll() {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Returning all persisted messages");

         }

         Query query = entityManager.createNamedQuery("PersistedMessage.FindAll");

         return (List<PersistedMessage>) query.getResultList();

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessage> findAll(int maxRows) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Finding next " + maxRows + " messages");

         }

         Query query = entityManager.createNamedQuery("PersistedMessage.FindAll");

         query.setMaxResults(maxRows);

         return (List<PersistedMessage>) query.getResultList();

     }

     public PersistedMessagePayload findByPersistedMessageByRouteQueueId(Long routeQueueId) {

         return (PersistedMessagePayload) entityManager.find(PersistedMessagePayload.class, routeQueueId);

     }

     public PersistedMessage findByRouteQueueId(Long routeQueueId) {

         return (PersistedMessage) entityManager.find(PersistedMessage.class, routeQueueId);

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessage> findByServiceName(QName serviceName, String methodName) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Finding messages for service name " + serviceName);

         }

         Query query = entityManager.createNamedQuery("PersistedMessage.FindByServiceName");

         query.setParameter("serviceName", serviceName);

         query.setParameter("methodName", methodName);

         return (List<PersistedMessage>) query.getResultList();

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessage> findByValues(Map<String, String> criteriaValues, int maxRows) {

         Criteria criteria = new Criteria(PersistedMessage.class.getName());

         for(Map.Entry<String, String> entry : criteriaValues.entrySet()) {

             criteria.eq(entry.getKey(), entry.getValue());

         }

         QueryByCriteria query = new QueryByCriteria(entityManager, criteria);

         return query.toQuery().getResultList();

     }

     @SuppressWarnings("unchecked")

     public List<PersistedMessage> getNextDocuments(Integer maxDocuments) {

         String serviceNamespace = ConfigContext.getCurrentContextConfig().getServiceNamespace();

         Query query = entityManager.createNamedQuery("PersistedMessage.GetNextDocuments");

         query.setParameter("serviceNamespace", serviceNamespace);

         query.setParameter("queueStatus", KSBConstants.ROUTE_QUEUE_EXCEPTION);

         query.setParameter("ipNumber", RiceUtilities.getIpNumber());

         if (maxDocuments != null)

             query.setMaxResults(maxDocuments);

         return (List<PersistedMessage>) query.getResultList();

     }

     public void remove(PersistedMessage routeQueue) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("Removing message " + routeQueue);

         }

         PersistedMessagePayload persistedMessagePayload = (PersistedMessagePayload) entityManager.find(PersistedMessagePayload.class, routeQueue.getRouteQueueId());

         PersistedMessage persistedMessage = (PersistedMessage) entityManager.find(PersistedMessage.class, routeQueue.getRouteQueueId());

         if(persistedMessagePayload != null) {

             entityManager.remove(persistedMessagePayload);

         }

         if(persistedMessage != null) {

             entityManager.remove(persistedMessage);

         }

     }

     public void save(PersistedMessage routeQueue) {

         if(routeQueue.getRouteQueueId() == null) {

             entityManager.persist(routeQueue);

             routeQueue.getPayload().setRouteQueueId(routeQueue.getRouteQueueId());

             entityManager.persist(routeQueue.getPayload());

         }

         else {

             entityManager.merge(routeQueue);

             entityManager.merge(routeQueue.getPayload());

         }

     }

     public EntityManager getEntityManager() {

         return this.entityManager;

     }

     public void setEntityManager(EntityManager entityManager) {

         this.entityManager = entityManager;

     }

 }