Does JAX-RS/Jersey 2.x utilize servlet 3.0 async capability?

Question

Does JAX-RS/Jersey 2.x utilize servlet 3.0 async capability? or it is just another async layer on top of old-fashioned thread/request based servlet architecture.

Answer 1

From what I have understand, async in Jersey will come in version 2.0 (mostly the implementation of JAX-RS 2.0). Look at the current status on the project :

Currently we are working full speed on Jersey 2.0 which will implement JAX-RS 2.0. Milestone builds are available from maven central repository. You can see the latest snapshot of Jersey 2.0 API documentation here . More information can be found on Jersey 2.0 Status page .

Looking at the documentation, you may find AsyncResponse , which is a good start, I guess.

Answer 2

Jersey supports various containers. When running on Servlet 3.x it utilizes the async servlet capability to implement the async API. When running on Grizzly, it utilizes the Grizzly NIO API.