[weld-dev] persistence and transactions outside Java EE

[Dan Allen]

I was talking to someone about this topic post-Devoxx. I came up with an
idea that may be worth considering. Perhaps the Java EE platform can
recognize another class of bean that has persistence and transaction
capabilities, but not the rest of EJB. Here's my proposed breakdown, in
terms of airplane seat classes (I was on an airplane at the time).

First class - EJB session bean
Business class - local transactional bean
Coach - Simple managed bean

The main differientiator of a "business class bean" from an EJB is that it
would have the option to use local transactions, just like an
application-managed JPA persistence unit. It would also not support any HA
concerns. But it would be a drop in replacement for so-called "lightweight"
transaction beans that Spring offers.

Then, we wouldn't need to do anything special in Weld / Seam 3. All we would
need is to be able to support these types of beans in a servlet container,
the same way that Weld supports those environments. But it would be a
standard part of Java EE (6 MR1 or 7).

If we feel like we need to support this use case in Seam, then clearly there
is still something missing in Java EE.

-Dan

On Wed, Nov 18, 2009 at 6:10 PM, Gavin King <gavin.king at gmail.com> wrote:

> I think we should try and follow the Java EE models as closely as
> possible for this stuff. We should simply try and make the Java EE
> code work outside EE 6.
>
> e.g.
>
> (1) use a resource declaration with @PersistenceContext(unitName=....)
> to define a managed persistence context
> (2) use JBoss Transactions to manage transactions in a servlet engine
> - so instead of having a special tx manager for JDBC, it is just JTA
>
> Or is the 10meg download for JBoss Transactions just no good?
>
> --
> Gavin King
> gavin.king at gmail.com
> http://in.relation.to/Bloggers/Gavin
> http://hibernate.org
> http://seamframework.org
> _______________________________________________
> weld-dev mailing list
> weld-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/weld-dev
>



-- 
Dan Allen
Senior Software Engineer, Red Hat | Author of Seam in Action
Registered Linux User #231597

http://mojavelinux.com
http://mojavelinux.com/seaminaction
http://www.google.com/profiles/dan.j.allen
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