not able to invoke messge bean from restful webservice

I am trying to create Restful Webservice as a client of Message Driven Bean, But when i invoke the restful method its giving me following error when

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Connection connection =  connectionFactory.createConnection();

SEVERE: The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.NullPointerException
        at com.quant.ws.GetConnection.startThread(GetConnection.java:99)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 

here is the following code:

// Inside class declaration
@Resource(mappedName = "jms/testFactory")
private static ConnectionFactory connectionFactory;

@Resource(mappedName = "jms/test")
private static Queue queue;

Web services Method

@GET
@Path("startThread")
@Produces("application/xml")
public String startThread()
{

    try{
    Connection connection =  connectionFactory.createConnection(); // its line number 99
    Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
    MessageProducer producer = session.createProducer( queue);
    Message message = session.createTextMessage();
    message.setStringProperty("name", "start");
    producer.send(message);
    }catch(JMSException e){
        System.out.println(e);
    }
   return "<data>START</data>";
}

Do i need to specify anything in sun-web.xml or web.xml ?

---

I think it depends on your applicationserver setup. Did you inject the connectionFactory somewhere above? Or did a context lookup?

---

connectionFactory is null. It needs to be initialised somehow.

---

I have solved it by replacing following code

  try{
       InitialContext ctx = new InitialContext();
      queue = (Queue) ctx.lookup("jms/test");
      QueueConnectionFactory factory =
      (QueueConnectionFactory) ctx.lookup("jms/testFactory");
      Connection connection = factory.createConnection();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageProducer producer = session.createProducer( queue);

        Message message = session.createTextMessage();
        message.setStringProperty("name", "start");
        producer.send(message);

     }
     catch(NamingException e){
         System.out.println(e);
     }
     catch(JMSException e){
     System.out.println(e);
     }