Application Structure- Spring, Oracle Application Server, Oracle Queue

Hi Guys

I want to setup an application which will be listening on Oracle (Database) Queue and will call a webservice after processing the message from the queue. This application will run in Oracle Application Server. Kindly help me with following question

1-Should I use EJB3 or Spring to listen on Queue
2- I am more inclined to Spring; If I use Spring will it be a web application based in the spring? I am new to Spring and not able to visualize the placement of MDP in Spring webapp.

Looking forward for you kind suggestions

Spring provides good supports for JMS.

I would imagine you would need to create a stand alone client that can consume messages from a queue - like any other non-spring solution. I don't see why you would need to create a web application or how that could even help!