I just found an interesting quote from a paper on JDO:
http://www.jdocentral.com/pdf/eigner_jdo.pdf
"With the availability of JDO, it makes you wonder when
and if you would ever need an EJB container at all within your
application architecture if you use it only as a front-end
to your database. All the model-oriented business logic can be
coded in the classes persisted by JDO, sparing us from using
patterns such as 'data object' or 'value object'.
After using JDO we contend that most web-based applications
could be developed more easily with a web container and a set
of JDO enhanced classes to encapsulate the model
of the application. "
This sounds very attractive to me from a learning POV for
a standard DB application:
* use flow for the controller; interactiing with forms and
* enhanced JDO for the model/data access
* views by generator of your choice...
Derek
>>> [EMAIL PROTECTED] 2004/05/07 10:58:22 AM >>>
Derek Hohls wrote:
> Thanks - I assume that if one is NOT working
> in a J2EE application, that the principles and
> approaches will be the same ie. is there more
> info that discusses how to move from an
> "ordinary" set of Java objects to a full-blown J2EE
> approach?
It's quite difficult to say what constitutes a "full-blown" J2EE app
versus an "ordinary" Java app, to use your terms. J2EE is made up of
many technologies, not all of which must be used together at any one
time.
Cocoon typically runs inside a Servlet container, whose behavior is
mandated by the J2EE spec, so when you're running "cocoon servlet",
yes,
you have a J2EE application. Even if you don't use EJB, JTA, JMS, etc.
But if you want to know what a "typical" J2EE app looks like, I think
the patterns book that was mentioned in this thread (a possibly also
this one [1]) might give you a bigger picture.
Ugo
[1]: http://www.amazon.com/exec/obidos/tg/detail/-/0201787903/
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