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package org.apache.tuscany.binding.jms;
import java.lang.reflect.Method;
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.jms.TextMessage;
import javax.naming.Context;
import javax.naming.NamingException;
public class JMSProxy implements MessageListener{
protected Method operationMethod;
protected SDODataBinding dataBinding;
private Object entryPointProxy;
private JMSBinding jmsBinding;
private Context context;
private JMSResourceFactory jmsResourceFactory;
private OperationSelector operationSelector;
public JMSProxy(Object entryPointProxy,JMSResourceFactory jmsResourceFactory, JMSBinding jmsBinding,SDODataBinding dataBinding, OperationSelector operationSelector) throws NamingException{
this.entryPointProxy = entryPointProxy;
this.dataBinding = dataBinding;
this.jmsBinding = jmsBinding;
this.jmsResourceFactory = jmsResourceFactory;
this.operationSelector = operationSelector;
}
public void onMessage(Message msg){
String operationName = operationSelector.getOperationName(msg);
try {
Object[] args = dataBinding.fromXML(((TextMessage)msg).getText());
operationMethod = getOperationMethod(entryPointProxy,operationName,args);
Object result = operationMethod.invoke(entryPointProxy,args);
// if result is null then the method can be assumed as oneway
if (result != null){
String response = dataBinding.toXML(new Object[] {result} );
sendReply(operationName, response);
}
} catch (Exception e) {
// need to do proper error handling
e.printStackTrace();
}
}
private Method getOperationMethod(Object entryPointProxy2, String operationName, Object[] args) {
// TODO Auto-generated method stub
return null;
}
private void sendReply(String operationName,String payload) throws JMSException, NamingException{
Session session = jmsResourceFactory.createSession();
javax.jms.Message message = jmsResourceFactory.createMessage(session);
message.setJMSCorrelationID(operationName); // I am using the existing header instead of adding a new JMS property.
((javax.jms.TextMessage)message).setText((String)payload);
Destination destination = null;
Object obj = context.lookup(jmsBinding.getDestinationName());
destination = (Destination) obj;
MessageProducer producer = session.createProducer(destination);
producer.send(message);
producer.close();
session.close();
}
}
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