Posted by editor
on December 21, 2009 at 7:28 AM PST
In this week's java.net Spotlight, we're featuring Ed Ort's new three-part article series, "Introducing the Java EE 6 Platform"...
In this week's java.net Spotlight, we're featuring Ed Ort's new three-part article series, Introducing the Java EE 6 Platform . Ed Ort is a Sun Developer Network staff writer; he's written extensively about database, programming, and web services technology.
Part 1 of the series looks at the goals of the Java EE 6 platform. These include:
- More flexible technology stack
- Enhanced extensibility
- Further ease of development
Among the leading new Java EE 6 technologies, Ed cites the Java API for RESTful Web Services (JAX-RS), JSR 311 . JAX-RS:
enables you to rapidly build lightweight web services that conform to the Representational State Transfer (REST) style of software architecture. An important concept in REST is the existence of resources, each of which can be referred to with a global identifier, that is, a URI. In particular, data and functionality are considered resources that can be identified and accessed through URIs. To manipulate these resources, components of the network, clients and servers, communicate through a standardized interface such as HTTP and a small, fixed set of verbs - GET, PUT, POST, and DELETE - and exchange representations of these resources.
Ed then provides an example of JAX-RS in action, in a code example.
Ed also covers Contexts and Dependency Injection (CDI), JSR 299 , in Java EE 6:
These services allow Java EE components, including EJB session beans and JavaServer Faces (JSF) managed beans, to be bound to lifecycle contexts, to be injected, and to interact in a loosely coupled way by firing and observing events. Perhaps most significantly, CDI unifies and simplifies the EJB and JSF programming models. It allows enterprise beans to replace JSF managed beans in a JSF application.
An code example of CDI in action is provided.
The first article in the series completes with a discussion of Bean Validation, JSR 303 , and example code.
Part 2 in the series covers Java EE 6's enhanced web tier capabilities, support for web fragments in Servlet 3.0, shared framework pluggability, asynchronous processing in Servlet 3.0, simplified page authoring in JSF 2.0, facelets, templating, composite components, JSF 2.0 AJAX support, and other Servlet 3.0 and JSF 2.0 new features.
Part 3 of the series talks about ease of use improvements, the no-interface view, singletons, asynchronous session bean invocation, simplified packaging, EJB 3.1 features, Java Persistence API 2.0, object/relational mapping enhancements, Java Persistence Query Language enhancements, the Criteria API, pessimistic locking support, annotations in Java EE components, profiles and pruning, the Web Profile, and more.
All in all, Ed Ort's Introducing the Java EE 6 Platform series is a comprehensive overview of what's new in Java EE 6. It's a good place to start if you've heard the news that Java EE 6 was approved, but haven't yet had a chance to learn what's actually in it.
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Our current Spotlight is Ed Ort's three part article series, Introducing the Java EE 6 Platform : "Java Platform, Enterprise Edition (Java EE) is the industry-standard platform for building enterprise-class applications coded in the Java programming language. Based on the solid foundation of Java Platform, Standard Edition (Java SE) , Java EE adds libraries and system services that support the scalability, accessibility, security, integrity, and other requirements of enterprise-class applications..."
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The latest Java Mobility Podcast is Java Mobile Podcast 92: MIDP 3.0 in Depth: Tutorials and Demonstrations : Excerpts from the JavaOne 2009 MIDP 3.0 In Depth: Tutorials and Demonstrations session with Roger Riggs, Lakshmi Dontamsetti and Stan Kao.
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-- Kevin Farnham