title: Lightweight & Fast REST Server library for java?
body: <p>I'm looking for a lightweight REST library.</p>
  
  <p>It must be small (in kb size) an Fast (in total execution time). The optimal solution is a single jar without any dependencies what so ever.</p>
  
  <p>The application is designed to run on the AppEngine so the library should work on GAE/J platform.</p>