title: Spring/BlazeDS message interceptor use cases
body: <p>The Spring BlazeDS integration (in our cases 1.0.5M1) allows us to define <code>MessageInterceptor</code> instances and register them in the message broker. My question is simple: does anyone have any idea what this mechanism should or shouldn't be used for?</p>
  
  <p>From the API documentation I can see that the framework itself uses interceptors for Spring Security integration. We were thinking of using these interceptors as a way of enforcing our own special kind of security (we track our users using our own services in the application context), where a condition is evaluated every time a message is sent across the wire.</p>
  
  <p>We realise we should probably integrate Spring Security at some point to handle these things more formally, but for now the message interceptor seems like a good idea.</p>