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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.binding.jms.host;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.Topic;
import javax.naming.NamingException;
import javax.resource.spi.ActivationSpec;
import org.apache.tuscany.sca.binding.jms.JMSBinding;
import org.apache.tuscany.sca.binding.jms.JMSBindingConstants;
import org.apache.tuscany.sca.binding.jms.JMSBindingException;
import org.apache.tuscany.sca.binding.jms.provider.JMSResourceFactory;
import org.apache.tuscany.sca.work.WorkScheduler;
/**
* Implementation of a JMS response queue handler for async responses
*
* @version $Rev$ $Date$
*/
public class AsyncResponseJMSServiceListener implements JMSServiceListener {
private static final Logger logger = Logger.getLogger(AsyncResponseJMSServiceListener.class.getName());
private MessageListener listener;
private String serviceName;
private JMSBinding jmsBinding;
private WorkScheduler workScheduler;
private JMSResourceFactory jmsResourceFactory;
private MessageConsumer consumer;
private boolean running;
private Destination destination;
public AsyncResponseJMSServiceListener(MessageListener listener, String serviceName,
JMSBinding jmsBinding, WorkScheduler workScheduler, JMSResourceFactory rf) {
this.listener = listener;
this.serviceName = serviceName;
this.jmsBinding = jmsBinding;
this.workScheduler = workScheduler;
this.jmsResourceFactory = rf;
}
public void start() {
this.running = true;
try {
registerListener();
} catch (Exception e) {
if (e instanceof JMSBindingException) throw (JMSBindingException)e;
throw new JMSBindingException("Error starting JMSAsyncResponse endpoint", e);
}
} // end start
public void stop() {
this.running = false;
try {
consumer.close();
jmsResourceFactory.closeConnection();
jmsResourceFactory.closeResponseConnection();
} catch (Exception e) {
// if using an embedded broker then when shutting down Tuscany the broker may get closed
// before this stop method is called. I can't see how to detect that so for now just
// ignore the exception if the message is that the transport is already disposed
if ((e.getMessage() == null) || !e.getMessage().contains("disposed")) {
throw new JMSBindingException("Error stopping JMSServiceBinding", e);
}
}
} // end stop
private void registerListener() throws NamingException, JMSException {
Session session = jmsResourceFactory.createSession();
lookupActivationSpec();
destination = lookupQueue( jmsBinding.getResponseDestinationName() );
if (destination == null) {
throw new JMSBindingException("Unable to create Async Response queue");
} // end if
if (jmsBinding.getJMSSelector() != null) {
consumer = session.createConsumer(destination, jmsBinding.getJMSSelector());
} else {
consumer = session.createConsumer(destination);
} // end if
try {
consumer.setMessageListener(listener);
jmsResourceFactory.startConnection();
} catch (javax.jms.JMSException e) {
// setMessageListener not allowed in JEE container so use Tuscany threads
jmsResourceFactory.startConnection();
workScheduler.scheduleWork(new Runnable() {
public void run() {
try {
while (running) {
final Message msg = consumer.receive();
workScheduler.scheduleWork(new Runnable() {
public void run() {
try {
listener.onMessage(msg);
} catch (Exception e) {
e.printStackTrace();
} // end try
} // end method run
});
} // end while
} catch (Exception e) {
e.printStackTrace();
} // end try
} // end method run
});
} // end try
logger.log(Level.INFO, "JMS AsyncResponse handler '"
+ serviceName
+ "' listening on destination "
+ ((destination instanceof Queue) ? ((Queue)destination).getQueueName() : ((Topic)destination).getTopicName()));
} // end method registerListener
// Stub code for ActivationSpec support that throws appropriate errors
private void lookupActivationSpec() {
if ( jmsBinding.getActivationSpecName() != null ) {
String createMode = jmsBinding.getActivationSpecCreate();
if ( JMSBindingConstants.CREATE_ALWAYS.equals(createMode) ) {
ActivationSpec spec = jmsResourceFactory.lookupActivationSpec(jmsBinding.getActivationSpecName());
if ( spec != null ) {
throw new JMSBindingException("ActivationSpec specifies create mode of \"always\" but resource already exists.");
}
throw new JMSBindingException("Can not create ActivationSpec");
} else if ( JMSBindingConstants.CREATE_IF_NOT_EXIST.equals(createMode)) {
ActivationSpec spec = jmsResourceFactory.lookupActivationSpec(jmsBinding.getActivationSpecName());
if ( spec == null ) {
throw new JMSBindingException("Can not create ActivationSpec");
}
} else if ( JMSBindingConstants.CREATE_NEVER.equals(createMode)) {
ActivationSpec spec = jmsResourceFactory.lookupActivationSpec(jmsBinding.getActivationSpecName());
if ( spec == null )
throw new JMSBindingException("ActivationSpec specifies create mode of \"never\" but resource does not exist at jndiName " + jmsBinding.getActivationSpecName());
} // end if
} // end if
} // end method lookupActivationSpec
/**
* Looks up the Async Response Queue for the JMS Binding.
* <p>
* What happens in the look up will depend on the create mode specified for the JMS Binding:
* <ul>
* <li>always - the JMS queue is always created. It is an error if the queue already exists
* <li>ifnotexist - the JMS queue is created if it does not exist. It is not an error if the queue already exists
* <li>never - the JMS queue is never created. It is an error if the queue does not exist
* </ul>
* See the SCA JMS Binding specification for more information.
* <p>
* @param queueName - the name of the Async Response queue
* @return The Async Response queue.
* @throws NamingException Failed to lookup JMS queue
* @throws JMSBindingException Failed to lookup JMS Queue. Probable cause is that the JMS queue's current existence/non-existence is not
* compatible with the create mode specified on the binding
*/
private Destination lookupQueue(String queueName ) throws NamingException, JMSBindingException {
Destination destination = jmsResourceFactory.lookupDestination(queueName);
String qCreateMode = jmsBinding.getDestinationCreate();
if (qCreateMode.equals(JMSBindingConstants.CREATE_ALWAYS)) {
// In this mode, the queue must not already exist as we are creating it
if (destination != null) {
throw new JMSBindingException("JMS Destination " + queueName
+ " already exists but has create mode of \""
+ qCreateMode
+ "\" while registering service "
+ serviceName
+ " listener");
} // end if
// Create the queue
destination = jmsResourceFactory.createDestination(queueName);
} else if (qCreateMode.equals(JMSBindingConstants.CREATE_IF_NOT_EXIST)) {
// In this mode, the queue may nor may not exist. It will be created if it does not exist
// but don't create when using jms:jndi uri format
if (destination == null && !"jndi".equals(jmsBinding.getDestinationType())) {
destination = jmsResourceFactory.createDestination(queueName);
} // end if
} else if (qCreateMode.equals(JMSBindingConstants.CREATE_NEVER)) {
// In this mode, the queue must have already been created.
if (destination == null) {
throw new JMSBindingException("JMS Destination " + queueName
+ " not found but create mode of \""
+ qCreateMode
+ "\" while registering service "
+ serviceName
+ " listener");
} // end if
} // end if
// Make sure we ended up with a queue
if (destination == null) {
throw new JMSBindingException("JMS Destination " + queueName
+ " not found with create mode of \""
+ qCreateMode
+ "\" while registering service "
+ serviceName
+ " listener");
} // end if
// Make sure its the expected type (queue or topic)
String type = (destination instanceof Queue) ? JMSBindingConstants.DESTINATION_TYPE_QUEUE : JMSBindingConstants.DESTINATION_TYPE_TOPIC;
if ("jndi".equals(jmsBinding.getDestinationType())) {
jmsBinding.setDestinationType(type);
} else {
if (!type.equals(jmsBinding.getDestinationType())) {
throw new JMSBindingException("JMS Destination " + queueName
+ " expecting type of "
+ jmsBinding.getDestinationType()
+ " but found "
+ type
+ " while registering service "
+ serviceName
+ " listener");
} // end if
} // end if
return destination;
} // end method lookupDestinationQueue(String)
public String getDestinationName() {
try {
if (destination instanceof Queue) {
return ((Queue)destination).getQueueName();
} else if (destination instanceof Topic) {
return ((Topic)destination).getTopicName();
} else {
return null;
}
} catch (JMSException e) {
throw new JMSBindingException(e);
}
} // end method getDestinationName
} // end class AsyncResponseJMSServiceListener
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