Vaadin 6.8 integration to spring 3 framework

Hello All,

I am very new to Vaadin, but I have a good handson experience on GWT. Could you please help me how to
use vaadin as a front end toold and make a server calls to spring framewor. i.e how to integrate vaadin and spring 3 framework, anyone who is having good experience on vaadin can send me a small sample of integrating vaadin 6.8 version with spring 3.

Arun K.P