/**
*
* Copyright RAJD Consultanct Ltd
*
* 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.servicemix.components.jms;
import javax.jbi.messaging.ExchangeStatus;
import javax.jbi.messaging.InOut;
import javax.jbi.messaging.MessageExchange;
import javax.jbi.messaging.MessagingException;
import javax.jbi.messaging.NormalizedMessage;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.xml.transform.TransformerException;
import org.activemq.util.JMSExceptionHelper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.servicemix.components.util.ComponentSupport;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.jms.JmsException;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.jms.core.SessionCallback;
/**
* A component which uses a {@link JmsTemplate} to consume messages from a destination, forward then intot the JBI
* container for processing, and send back the result to the JMS requestor - used for the TopipcRequestor and
* QueueRequestor pattern
*
* @version $Revision: 716 $
*/
public class JmsServiceComponent extends ComponentSupport implements MessageListener, InitializingBean, DisposableBean {
private static final Log log = LogFactory.getLog(JmsServiceComponent.class);
private DestinationChooser destinationChooser;
private JmsMarshaler marshaler = new JmsMarshaler();
private JmsTemplate template;
private String selector;
private MessageConsumer consumer;
public void afterPropertiesSet() throws Exception {
if (template == null) {
throw new IllegalArgumentException("Must have a template set");
}
template.execute(new SessionCallback() {
public Object doInJms(Session session) throws JMSException {
Destination defaultDestination = template.getDefaultDestination();
if (defaultDestination == null) {
defaultDestination = template.getDestinationResolver().resolveDestinationName(session,
template.getDefaultDestinationName(), template.isPubSubDomain());
}
consumer = session.createConsumer(defaultDestination, selector);
return null;
}
}, true);
consumer.setMessageListener(this);
}
public void destroy() throws Exception {
if (consumer != null) {
consumer.close();
}
}
/**
* @return Return the DestinationChooser
*/
public DestinationChooser getDestinationChooser() {
return destinationChooser;
}
/**
* Set the DestinationChooser
*
* @param destinationChooser
*/
public void setDestinationChooser(DestinationChooser destinationChooser) {
this.destinationChooser = destinationChooser;
}
/**
* Get the JMSMarshaller
*
* @return the Marshaller
*/
public JmsMarshaler getMarshaller() {
return marshaler;
}
/**
* Set the JMSMarshaller
*
* @param marshaler
*/
public void setMarshaller(JmsMarshaler marshaler) {
this.marshaler = marshaler;
}
/**
* @return the JmsTemplate
*/
public JmsTemplate getTemplate() {
return template;
}
/**
* Set the JmsTemplate
*
* @param template
*/
public void setTemplate(JmsTemplate template) {
this.template = template;
}
/**
* @return Return the selector
*/
public String getSelector() {
return selector;
}
/**
* Set the Selector
*
* @param selector
*/
public void setSelector(String selector) {
this.selector = selector;
}
public void onMessage(final Message jmsMessage) {
try {
final InOut messageExchange = getDeliveryChannel().createExchangeFactory().createInOutExchange();
NormalizedMessage inMessage = messageExchange.createMessage();
try {
marshaler.toNMS(inMessage, jmsMessage);
messageExchange.setInMessage(inMessage);
if (getDeliveryChannel().sendSync(messageExchange)) {
Destination destination = getReplyToDestination(jmsMessage, messageExchange);
try {
template.send(destination, new MessageCreator() {
public Message createMessage(Session session) throws JMSException {
try {
Message message = marshaler.createMessage(messageExchange.getOutMessage(), session);
message.setJMSCorrelationID(jmsMessage.getJMSCorrelationID());
if (log.isTraceEnabled()) {
log.trace("Sending message to: " + template.getDefaultDestinationName()
+ " message: " + message);
}
return message;
}
catch (TransformerException e) {
throw JMSExceptionHelper.newJMSException("Failed to create JMS Message: " + e, e);
}
}
});
done(messageExchange);
}
catch (JmsException e) {
fail(messageExchange, e);
}
}
}
catch (JMSException e) {
log.error("Couldn't process " + jmsMessage, e);
messageExchange.setError(e);
messageExchange.setStatus(ExchangeStatus.ERROR);
}
}
catch (MessagingException e) {
log.error("Failed to process inbound JMS Message: " + jmsMessage, e);
}
}
protected Destination getReplyToDestination(Message jmsMessage, final InOut messageExchange) throws JMSException {
if (destinationChooser == null) {
return jmsMessage.getJMSReplyTo();
}
return destinationChooser.chooseDestination(messageExchange);
}
/**
* Choose the out bound destination to send the repsonse from JBI too If a DestinatonChooser is set, this is used,
* else the replyTo destination on the inbound message is used
*
* @param exchange
* @param inboundMessage
* @return the choosen outbound destination or null
* @throws JMSException if no destination can be found
*/
protected Destination chooseOutBoundDestination(MessageExchange exchange, Message inboundMessage)
throws JMSException {
Destination result = null;
if (destinationChooser != null) {
result = destinationChooser.chooseDestination(exchange);
}
else if (inboundMessage != null && inboundMessage.getJMSReplyTo() != null) {
result = inboundMessage.getJMSReplyTo();
}
if (result == null) {
log.error("Could not find an outbound destination for " + inboundMessage);
throw new JMSException("No outbound JMS Destination can be found");
}
return result;
}
}