title: What is the best Java RESTful framework for a very simple backend server?
body: <p>I need to develop a very thin shim for hadoop to be used together with Rails/Sinatra application. I'm a .Net developer and have a lot experience with Ruby. So what is the best framework to choose giving the fact it is needed for a very small project and it should provide RESTful web services.</p>
  
  <p>I looked at Grails and it seems to be very robust and Rails alike solution. Should I look at Spring? Or it will be an overkill for my use case?</p>