JAX-RS 2.0 is a new standard Java API for RESTful Web services and a major leap forward in the features and use cases covered by the API. The purpose of this technical session is to elaborate on all the new features being introduced as part of this new major API revision. This session explores the new client API, concepts behind filters and interceptors API, and asynchronous processing support. Other new features it covers include data validation support and improved support for hypermedia and server-side content negotiation. The last part of the session also briefly outlines future plans and focus areas.