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Folks get ready to savor the brand new flavor of coffee – Java EE 6 (JSR 316). The new specification for Java Platform Enterprise Edition is now ready and it promises some very exciting new features. Following is an overview of some of the proposed changes in Java EE specifications.

• Profiles (Making Java EE lean and mean)

An application loaded with features is a delight but increase in complexity is a hassle. The platform has become pretty huge and complex and we don’t need all the functionalities all the time. So the concept of profiles has been introduced.

Profiles are designed to break the platform in relevant modules. The new specification includes only Web Profile later there will be separate JSR for different profiles. The Web Profile instead of having complete Java EE stack will only have APIs relevant to most web applications like Servlets, JSP, JSF, EJB Lite etc., APIs like Java Mail, JAX-WS, JAX-RS, JAXB will not be included in Web Profile.

• Pruning (Getting rid of outdated APIs)

Lots of APIs in the platform have become irrelevant because either they are not well deployed or some new APIs have replaced them.

So in Java EE 6 some of these APIs will be removed. The APIs marked for removals in new specification are JAX-RPC, EJB 2.x Entity Beans CMP, JAXR.

• New versions of EJB, Servlet, JPA.

Things are bound to get better and better. The platform will have new versions of EJB,Servlet and JPA APIs.

EJB 3.1 (EJB 3 Reloaded)

Version 5 made us forget about dark days of EJB 2.x by introducing EJB 3. Java EE 6 will have an enhanced version of EJB which will further simplify the Business Component Development model.

Some of the features of EJB 3.1 are.

• EJB 3.1 Lite has been introduced in Version 6 which is aimed at Web Profile. EJB 3.1 Lite will have features like transaction & security but will not have advanced features like remoting, scheduling & messaging.
• Business interfaces will be optional for Session Beans.
• EJB 3.1 will support cron-style scheduling.

Servlet 3.0 (Finally Servlets will also enter into @notaion World)

We have been using Servlets for a long time now. Servlets API is a mature and powerful API. Version 6 will make Servlet API more dynamic by introducing annotations like @WebServlet, @ServletFilter and @WebServletContextListener and also Servlet 3.0 will allow to programmatically add Servlets, Filters and Listeners through the ServletContext.

JPA 2.0 (Persistence gets better)

JPA 2.0 will enhance the power of JPA 1.0 by providing following new features.

• JPA 2.0 will have @ElementCollection annotation which will allow using collections, maps and lists that do not represent entity relationships.
• JPA 2.0 will allow unidirectional one-to-many relationships.
• JPA 2.0 will add a Criteria API similar to Criteria API in Hibernate.

Apart from the above mentioned features there are some other features which will be introduced in Version 6 like Web Beans 1.0, JAX-RS 1.1, JSF 2.0, EJB Lite etc.

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Article by Janny

This platform is one of the most important platforms available to Java developers, it boasts of a wide array of software that allow programs written in Java codes to run on almost every computer without the need of specific alterations and translations. There is an inbuilt program namely Java virtual Machine that is backed up by exquisite libraries of already written codes, these help translate the programs so that they can easily run on any computer without any compatibility problems.

Java developers are given the right to tweak software so as to create whole new variations which need not be compatible with the original versions of the parent software. Sun has launched this open source program in the hope to get Java development team to diverge and move away from the original compatible and official Java programs and venture into new terrains.

Why go for usability if nobody reads the manuals? What is the point? Instead customers should be questioned on what they want. They should be contacted via a call/personal visit/ email to gauge their needs. Alternatively, questions at the end of a troubleshooting call are also a great option.

I believe the best part of using the Rails is that it is highly adaptable to any operating system and software that Apple, IBM, Sun Microsystems and Microsoft has to offer. This gives the Rails a very competitive edge as far as programming is concerned because the results are immediate and if changes it need to be done by the programmer, he can do it on the spot including making model views if needed for enhancement.

Any new programmer can take on this and have fun utilizing the tools available to support and integrate with the language being used and then a new creation comes into view. What’s more, it’s easy to learn and you don’t have to learn a whole new different computer jargon just to make the most simple program to the complex like games for example and this does not limit itself to plugins and scripts by expanding or embedding the programs.

In adopting agility, many companies tend to want to use the velocity metric since it is based around historical data. What many organizations fail to recognize is that velocity is not intended to be used as a reporting metric. Instead, velocity should be used as a planning metric that estimates the amount of work that can be dedicated to an iteration of a project. Presenting velocity to a client does nothing to show them the quality of the work, and therefore it provides no real business value.

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This video tutorial describes various techniques for Java Exception Handling. For more video’s in JAVA, pls visit:www.wingslive.com