Best way to write a jSON API on Google App Engine

Question

I'd like to create a Java web application on top of Google AppEngine.

What is the best way to develop a REST jSON API?

Do I have to write from scratch a servlet that manages the jSON handling or there is a library or something like the SOAP support for web services?

Answer 1

No need to write a servlet from scratch, use JAX RS, it is easy and simple http://tugdualgrall.blogspot.com/2010/02/create-and-deploy-jax-rs-rest-service.html