GWT 2, Spring 3 good working example / demo of client - server communication

I wouldn't normally post a question just asking where to find a good demo of something like this but I have spent a considerable amount of time over the last few days trying out a number of demo's I can find that are supposed to be for integr开发者_JS百科ating GWT 2 and Spring 3 but, so far, every one of them has had some issue where I cannot get it to run locally so that I can learn from it.

I simply would like a demo app that has communication from the GWT client side to the Spring server-side using RPC preferably with Maven as well. I already have some experience with GWT and have made my own small apps that make use of RPC calls to the server but it is not integrated with Spring. Likewise, I have experience with Spring as well but getting them to work together is proving to be a pain.

I have seen some tutorials about Roo but every one so far has not worked for me once I build it with Roo. Any advice is appreciated.

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I am using spring and gwt together. I have choosed spring4gwt, it is quite satisfactory..

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Take a look at Spring Roo, amazing project. http://www.springsource.org/roo

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Check this article about how to integrate Spring and GWT : http://crazygui.wordpress.com/2011/09/23/spring-gwt-integration-using-the-requestfactory-api/