Sorry to revive an old thread.
You may find some more info on this subject at
http://www.youtube.com/user/BTI360#p/a/u/1/xLWm8PJjdBk - RESTful Web Services with Spring Part 1 of 3
but more importantly
http://www.youtube.com/watch?v=TNE7NBLseRA RESTful Web Services with Spring Roo
