RE: Does jBoss work on iSeries?

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

> From: Dieter Bender
> 
> i would not agree with this statement.

That's okay.  That's what mailing lists are for <grin>.


> There are some drawbacks with EJBs, if
> you have other applications sitting on the same database, wich can't
use
> your ejb layer, you might come in some trouble

Yeah, that's a BIG problem, Dieter.  Among many.


> and for small applications the
> programmer overhead might be a contra argument.

Another huge problem.


> But you will get more scalability with ejbs than without and you will
get
> some benefits for your design.

Says who?  Why do you think all the overhead of EJB will somehow
translate to scalability?  In fact, every application designer I've
talked to points to EJB overhead as the primary reason their
applications DON'T scale.

Instead, the only real benefit of EJB is some level of database
independence, and that is only if you use CMP.  Unfortunately, CMP has a
number of design flaws, especially in commitment control, that make it
all but unusable in transaction-oriented business applications.  And
while BMP can be tuned to some level of acceptable performance, you then
lose basically all the benefits, however meager, of the EJB design.

No, even if you go on the pure Java boards, you'll see that more and
more the EJB architecture is being replaced by lightweight ORM engines
such as Hibernate.  If you continue to use EJB, you do it at your own
peril.

Joe