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Wednesday Oct 29, 2008

EJB 3 - From Legacy To Secret Weapon

Why EJB 3.X rocks? I summarized my view in this JavaWorld article: "EJB 3: From legacy technology to secret weapon". It provides especially answers for questions, which are frequently asked, especially before, my Java EE projects and in trainings. It covers the basics stuff - a condensed excerpt from the first chapter of a book I'm working on.

Posted at 08:41AM Oct 29, 2008 by Adam Bien in Java / JEE / Architecture  |  Kommentare[2]


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Kommentare:

I even found a picture to flesh out the complete makeover :-)

http://blog.jonasbandi.net/2008/10/ejb-3-complete-makover.html

Gesendet von Jonas Bandi am October 29, 2008 at 11:50 AM CET #

Hi Jonas,

the picture is great - it is a heavyhweight or a lightweight bean? It probably depends on perspective!

thank you for covering the article!,

regards,

adam

Gesendet von Adam Bien am October 29, 2008 at 12:52 PM CET #

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...the last 10 comments

Adam Bien wrote:

@Marcin,

exactly - in another project we used materialized views for similar purposes. Typical business "enterprise" projects a[...]

Marcin Deryło wrote:

In a project I'm working on we had a problem with some domain entities depending on User object (which resided in a separate module, exposing just[...]

Celinio Fernandes wrote:

Hi Adam,
Timers CANNOT be created for stateful session beans.

The spec says so. I am wondering why you said they can : "A timer[...]

Adam Bien wrote:

@Openwms,

For the old style JavaEE packaging the same questions have to be asked. Sometimes I see tons of ejb-jars - without any explicit[...]

openwms wrote:

Perhaps JEE packaging strategy with ears is a better solution :-D ?! I don't think so. I feel very well with the OSGi style, however it is not so [...]

Michael Enudi wrote:

Weldone Adam,

You are such a quiet role model in the java community.
Keep the good work on.....

Also to find out, how do yo[...]

Antonio wrote:

I prefer the NetBeans module system to OSGi. OSGi is not the only viable modular system for Java!



Adam Bien wrote:

@Mirko,

"it is funny to read that even Java savvy people have problems wrapping their head around the concepts of OSGi"

<[...]

Stefan Bohm wrote:

Some of the questions listed above may actually kill an OSGi-based project when the business case for using OSGi is not well-grounded. However, so[...]

Kai Prünte wrote:

Hi Adam,

I am interested in point 9 JPA.

If I have a module with JPA entities, how can I deploy this module in different version[...]

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