/**
*
* Copyright 2005 LogicBlaze, Inc.
*
* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* 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.logicblaze.lingo.jms;
import org.logicblaze.lingo.jms.impl.DefaultJmsProducer;
import org.logicblaze.lingo.jms.impl.OneWayRequestor;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.remoting.support.RemoteInvocationResult;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.Topic;
/**
* A JMS MessageListener that exports the specified service bean as a JMS
* service endpoint, accessible via a JMS proxy. <p/>
* <p>
* Note: JMS services exported with this class can be accessed by any JMS
* client, as there isn't any special handling involved.
*
* @author James Strachan
* @see JmsProxyFactoryBean
*/
public class JmsServiceExporter extends JmsServiceExporterSupport implements InitializingBean, DisposableBean {
private JmsProducer producer;
private ConnectionFactory connectionFactory;
private Destination destination;
private MessageConsumer consumer;
private String messageSelector;
private String subscriberName;
private boolean noLocal;
public void afterPropertiesSet() throws Exception {
if (producer == null) {
if (connectionFactory == null) {
throw new IllegalArgumentException("requestor or connectionFactory is required");
}
else {
producer = DefaultJmsProducer.newInstance(connectionFactory, getProducerConfig());
}
}
Requestor responseRequestor = getResponseRequestor();
if (responseRequestor == null) {
// responseRequestor = new
// MultiplexingRequestor(producer.getSession(), producer, null);
// setResponseRequestor(responseRequestor);
setResponseRequestor(new OneWayRequestor(producer, null));
}
super.afterPropertiesSet();
// do we have a destination specified, if so consume
if (destination != null) {
consumer = createConsumer();
consumer.setMessageListener(this);
}
}
public void destroy() throws Exception {
if (consumer != null) {
consumer.close();
}
}
public JmsProducer getProducer() {
return producer;
}
public void setProducer(JmsProducer producer) {
this.producer = producer;
}
public ConnectionFactory getConnectionFactory() {
return connectionFactory;
}
/**
* Used to create a default {@link JmsProducer} if no producer is explicitly
* configured.
*/
public void setConnectionFactory(ConnectionFactory connectionFactory) {
this.connectionFactory = connectionFactory;
}
public Destination getDestination() {
return destination;
}
/**
* If specified then the service will be auto-subscribed to this destination
*/
public void setDestination(Destination destination) {
this.destination = destination;
}
public String getMessageSelector() {
return messageSelector;
}
/**
* Sets the message selector applied to the subscription
*/
public void setMessageSelector(String messageSelector) {
this.messageSelector = messageSelector;
}
public boolean isNoLocal() {
return noLocal;
}
/**
* Sets whether or not topic subscriptions should receive locally produced messages
*/
public void setNoLocal(boolean noLocal) {
this.noLocal = noLocal;
}
public String getSubscriberName() {
return subscriberName;
}
/**
* Sets the durable subscriber name and enables a durable subscription.
*/
public void setSubscriberName(String subscriberName) {
this.subscriberName = subscriberName;
}
// Implementation methods
// -------------------------------------------------------------------------
/**
* Send the given RemoteInvocationResult as a JMS message to the originator
*
* @param message
* current HTTP message
* @param result
* the RemoteInvocationResult object
* @throws javax.jms.JMSException
* if thrown by trying to send the message
*/
protected void writeRemoteInvocationResult(final Message message, final RemoteInvocationResult result) throws JMSException {
Message responseMessage = createResponseMessage(producer.getSession(), message, result);
producer.getMessageProducer().send(message.getJMSReplyTo(), responseMessage);
}
/**
* Factory method to create the consumer
*/
protected MessageConsumer createConsumer() throws JMSException {
Session session = producer.getSession();
if (subscriberName != null) {
if (destination instanceof Topic) {
Topic topic = (Topic) destination;
return session.createDurableSubscriber(topic, subscriberName, messageSelector, noLocal);
}
else {
throw new IllegalArgumentException("Cannot specify the subscriberName property when using a Queue destination");
}
}
else {
return session.createConsumer(destination, messageSelector, noLocal);
}
}
}