Just six to go...

Two key JSRs accepted in time for Java EE 7

The final drafts of Bean Validation 1.1 and JAX-RS 2.0 have been approved by the JCP Executive Committee, meaning they will definitely be included in Java EE 7. Six JSRs remain to be accepted for inclusion, including the specification for EE 7 itself.

Key additions to the revised Bean Validation spec, JSR 343, include dependency injection, allowing constraint validator implementations to get resources injected automatically; method-level validation, which enables a “Programming by Contract” style of coding; group conversion, which allows the targeted group to be altered when cascading validation and improved integration with CDI.

The original spec was released in November 2009, defining a meta-data model and API for JavaBean validation based on annotations. Work on an improved version began early last year, having taken on board feedback from the first release. In March 2011, spec lead Emmanuel Bernard of Red Hat told JAXenter that the initial version was “close to the sweet spot” and that the JSR expert group were aiming for “an incremental evolution [rather] than a revolution”.

The other JSR to be approved, JSR 339, is also an update to an existing spec. Led by Santiago Pericas-Geertsen and Marek Potociar, both Oracle employees, JAX-RS 2.0 introduces two client APIs, both compatible with the REST style, supporting synchronous and asynchronous response processing. Java EE evangelist Arun Gupta of Oracle talked up the spec at a packed-out talk JAX London earlier this year - and also took the time to speak to JAXenter about it on camera.

While both of these JSRs were expected to make Java EE 7, it must come as a relief to those involved after the high-profile delay of multitenancy features.

Elliot Bentley

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