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One of the challenges in spec development is how to best leverage other specs that are being developed simultaneously, within the real-life constraints of schedules, resources, time-zones, etc. This is another situation where transparency and open-source is helping significantly - plus the usual hard work of the EGs. A case in point is EJB 3.1 and JAX-RS 1.1 where the EGs have been working to allow the use of POJO sesion beans as resource (root) or provider classes in Jersey, deployed as a plain WAR. This allows very natural Java programming, things like this root class
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@Stateless @Path("ssb") public class StatelessSessionRootResource { @Context private UriInfo ui; @GET public String get() { return "GET: " + ui.getRequestUri().toASCIIString(); } }
Check out full details in Paul's Glassfish v3, EJB 3.1 and Jersey and in Ken's JAX-RS and EJB.
EJB3.1 and JAX-RS are two of the new
JavaEE6
features you will be able to try
GFv3 in EA by JavaOne - see you there!
And the photo?
Another great partnership, this one in Mixed Doubles
in Badminton:
Kim Dong-moon
and
Ra Kyung-min :-)
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The EJB 3.1 Expert Group has released the Proposed Final Draft. Changes in this draft include Improved portable Local Session Bean lookups, Timezone support for calendar-based timers and Spec-defined stateful session bean timeouts |
EJB3.1 (and .lite) are key pieces of Java EE 6 and this announcement is an important step towards that release. Check out Ken's writeup and provide feedback to the Expert Group.
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GlassFish users probably take EJB 3, JPA, and dependency injection for granted but with others application servers reaching Java EE 5 compliance, Adam Bien's article on EJB 3 at JavaWorld is very timely. The article discusses how EJB 3 streamlines enterprise development and make them an appropriate technology for large but also small and midrange applications. |
Adam states that "(EJB's) are in fact the only vendor-neutral and portable solution for enterprise server-side applications" and goes on to contrast EJB 3 with previous versions from a developer perspective. The article describes how lookups and factories are replaced with dependency injection, the POJO + annotation approach, but also covers the use of ejb-jar.xml as well as interceptors (described here as lightweight AOP).
The article concludes with EJB 3.1 upcoming enhancements such as easier packaging (WAR), no-interface views, singletons, etc... Make sure you try the EJB 3.1 preview available from the update center of GlassFish v3 "Prelude".