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Lars Christian Hansen
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Hi experts!

Which EJB version is the most used out there? - I mean in real business.

2.0, 2.1 or 3.0?

Reason for asking is, that I want to learn the most used (anticipate 2.x) not necessarily the easiest (3.0?)

Kind regards

Lars
 
Jeanne Boyarsky
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Lars,
At the moment, I would think 2.1 is most used. If not that, than 2.0. However, this will be changing as time goes on. As we learned in last week's book promo, WebLogic is coming out with their EJB 3.0 compliant server soon. (It's currently only JBoss that has EJB 3.0 out.) This lack of vendor support is currently preventing people from using 3.0 in production.

While 3.0 is easier to learn, it is important to be familiar with the underlying concepts. It's not that it is most used. It is that you are more likely to find a project converting 2.1 to 3.0 than starting a green field project with 3.0.

So I would say to learn both!
 
Mark Spritzler
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Just to clarify Jeanne response. Actually JBoss isn't the only App Server out there supporting EJB3. Actually JBoss is not yet certified in EJB3 by Sun, but fully supports the spec.

Sun's Glassfish and this other one I can never remember the name, but if you look at the past weeks post, you can find it. Those two are certified EJB3.0 App Servers.

I would love it if JBoss was the only game in town with EJB3. Since I work for JBoss.

Mark
 
Lars Christian Hansen
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Thanks for the detailed replies - most appreciated.

I'll continue reading my Head First EJB book

Cheers

/Lars
 
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