001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.component.jms;
018
019 import javax.jms.JMSException;
020 import javax.jms.Session;
021 import javax.jms.TemporaryQueue;
022 import javax.jms.TemporaryTopic;
023
024 import org.springframework.jms.core.JmsOperations;
025 import org.springframework.jms.core.SessionCallback;
026
027 /**
028 * A class which represents some metadata about the underlying JMS provider
029 * so that we can properly bridge JMS providers such as for dealing with temporary destinations.
030 *
031 * @version $Revision: 469 $
032 */
033 public class JmsProviderMetadata {
034 private Class<? extends TemporaryQueue> temporaryQueueType;
035 private Class<? extends TemporaryTopic> temporaryTopicType;
036
037 /**
038 * Lazily loads the temporary queue type if one has not been explicitly configured
039 * via calling the {@link #setTemporaryQueueType(Class)}
040 */
041 public Class<? extends TemporaryQueue> getTemporaryQueueType(JmsOperations template) {
042 Class<? extends TemporaryQueue> answer = getTemporaryQueueType();
043 if (answer == null) {
044 loadTemporaryDestinationTypes(template);
045 answer = getTemporaryQueueType();
046 }
047 return answer;
048 }
049
050 /**
051 * Lazily loads the temporary topic type if one has not been explicitly configured
052 * via calling the {@link #setTemporaryTopicType(Class)}
053 */
054 public Class<? extends TemporaryTopic> getTemporaryTopicType(JmsOperations template) {
055 Class<? extends TemporaryTopic> answer = getTemporaryTopicType();
056 if (answer == null) {
057 loadTemporaryDestinationTypes(template);
058 answer = getTemporaryTopicType();
059 }
060 return answer;
061 }
062
063 // Properties
064 //-------------------------------------------------------------------------
065
066 public Class<? extends TemporaryQueue> getTemporaryQueueType() {
067 return temporaryQueueType;
068 }
069
070 public void setTemporaryQueueType(Class<? extends TemporaryQueue> temporaryQueueType) {
071 this.temporaryQueueType = temporaryQueueType;
072 }
073
074 public Class<? extends TemporaryTopic> getTemporaryTopicType() {
075 return temporaryTopicType;
076 }
077
078 public void setTemporaryTopicType(Class<? extends TemporaryTopic> temporaryTopicType) {
079 this.temporaryTopicType = temporaryTopicType;
080 }
081
082 // Implementation methods
083 //-------------------------------------------------------------------------
084 protected void loadTemporaryDestinationTypes(JmsOperations template) {
085 if (template == null) {
086 throw new IllegalArgumentException("No JmsTemplate supplied!");
087 }
088 template.execute(new SessionCallback() {
089 public Object doInJms(Session session) throws JMSException {
090 TemporaryQueue queue = session.createTemporaryQueue();
091 setTemporaryQueueType(queue.getClass());
092
093 TemporaryTopic topic = session.createTemporaryTopic();
094 setTemporaryTopicType(topic.getClass());
095
096 queue.delete();
097 topic.delete();
098 return null;
099 }
100 });
101 }
102 }