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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.provider;
import java.lang.reflect.InvocationTargetException;
import java.util.List;
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.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.naming.NamingException;
import org.apache.tuscany.sca.binding.jms.impl.JMSBinding;
import org.apache.tuscany.sca.binding.jms.impl.JMSBindingConstants;
import org.apache.tuscany.sca.binding.jms.impl.JMSBindingException;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
/**
* Listener for the JMSBinding.
*
* @version $Rev$ $Date$
*/
public class JMSBindingListener implements MessageListener {
private static final Logger logger = Logger.getLogger(JMSBindingListener.class.getName());
private static final String ON_MESSAGE_METHOD_NAME = "onMessage";
private JMSBinding jmsBinding;
private JMSResourceFactory jmsResourceFactory;
private RuntimeComponentService service;
private JMSMessageProcessor requestMessageProcessor;
private JMSMessageProcessor responseMessageProcessor;
private String correlationScheme;
public JMSBindingListener(JMSBinding jmsBinding,
JMSResourceFactory jmsResourceFactory,
RuntimeComponentService service) throws NamingException {
this.jmsBinding = jmsBinding;
this.jmsResourceFactory = jmsResourceFactory;
this.service = service;
requestMessageProcessor = jmsBinding.getRequestMessageProcessor();
responseMessageProcessor = jmsBinding.getResponseMessageProcessor();
correlationScheme = jmsBinding.getCorrelationScheme();
}
public void onMessage(Message requestJMSMsg) {
logger.log(Level.FINE, "JMS service '" + service.getName() + "' received message " + requestJMSMsg);
try {
Object responsePayload = invokeService(requestJMSMsg);
sendReply(requestJMSMsg, responsePayload, false);
} catch (Throwable e) {
logger.log(Level.SEVERE, "Exception invoking service '" + service.getName(), e);
sendReply(requestJMSMsg, e, true);
}
}
/**
* Turn the JMS message back into a Tuscany message and invoke the target component
*
* @param requestJMSMsg
* @return
* @throws JMSException
* @throws InvocationTargetException
*/
protected Object invokeService(Message requestJMSMsg) throws JMSException, InvocationTargetException {
String operationName = requestMessageProcessor.getOperationName(requestJMSMsg);
Object requestPayload = requestMessageProcessor.extractPayloadFromJMSMessage(requestJMSMsg);
List<Operation> opList = service.getInterfaceContract().getInterface().getOperations();
Operation operation = null;
if (opList.size() == 1) {
// SCA JMS Binding Specification - Rule 1.5.1 line 203
operation = opList.get(0);
} else if (operationName != null) {
// SCA JMS Binding Specification - Rule 1.5.1 line 205
for (Operation op : opList) {
if (op.getName().equals(operationName)) {
operation = op;
break;
}
}
} else {
// SCA JMS Binding Specification - Rule 1.5.1 line 207
for (Operation op : opList) {
if (op.getName().equals(ON_MESSAGE_METHOD_NAME)) {
operation = op;
break;
}
}
}
if (operation != null) {
return service.getRuntimeWire(jmsBinding).invoke(operation, (Object[])requestPayload);
} else {
throw new JMSBindingException("Can't find operation " + (operationName != null ? operationName
: ON_MESSAGE_METHOD_NAME));
}
}
protected void sendReply(Message requestJMSMsg, Object responsePayload, boolean isFault) {
try {
if (requestJMSMsg.getJMSReplyTo() == null) {
// assume no reply is expected
if (responsePayload != null) {
logger.log(Level.FINE, "JMS service '" + service.getName() + "' dropped response as request has no replyTo");
}
return;
}
Session session = jmsResourceFactory.createSession();
Message replyJMSMsg;
if (isFault) {
replyJMSMsg = responseMessageProcessor.createFaultMessage(session, (Throwable)responsePayload);
} else {
replyJMSMsg = responseMessageProcessor.insertPayloadIntoJMSMessage(session, responsePayload);
}
replyJMSMsg.setJMSDeliveryMode(requestJMSMsg.getJMSDeliveryMode());
replyJMSMsg.setJMSPriority(requestJMSMsg.getJMSPriority());
if (correlationScheme == null || JMSBindingConstants.CORRELATE_MSG_ID.equalsIgnoreCase(correlationScheme)) {
replyJMSMsg.setJMSCorrelationID(requestJMSMsg.getJMSMessageID());
} else if (JMSBindingConstants.CORRELATE_CORRELATION_ID.equalsIgnoreCase(correlationScheme)) {
replyJMSMsg.setJMSCorrelationID(requestJMSMsg.getJMSCorrelationID());
}
Destination destination = requestJMSMsg.getJMSReplyTo();
MessageProducer producer = session.createProducer(destination);
producer.send(replyJMSMsg);
producer.close();
session.close();
} catch (JMSException e) {
throw new JMSBindingException(e);
} catch (NamingException e) {
throw new JMSBindingException(e);
}
}
}
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