Java MVC framework focused in View and Controller layers

 The Web Flow module is a MVC extension that allows you to define Controllers
 using a domain-specific-language. This language is designed to model user
 interactions that require several requests into the server to complete, or may
 be invoked from different contexts. Provides:
  - A domain-specific-language for defining reusable controller modules called
    flows.
  - An advanced controller engine for managing conversational state.
  - First-class support for using Ajax to construct rich user interfaces.
  - First-class support for using JavaServerFaces with Spring.