Spring is just one of the ways to implement a RESTful service with Java. That being said, as long as you're using a framework and not writing everything yourself (which I imagine is not the case), this type of implementation should be familiar. If however you're outside of the web/REST context, then yes, the code may look odd. So the audience should be developers working on a RESTful architecture with Java and Spring.
Thanks for the interesting feedback.
Eugen.