Hi all

I recently heard from a friend of mine that sun is considering scrapping
the Entity beans concept and is trying to push Message driven beans and
Data Access Objects+Session Beans as alternatives. The reason they have put
forward is performance bottlenecks for large applications.  Any comments?

I have a few questions regarding Data Access Objects

1. My idea of DAOs are that they abstract away the database specific stuff
from Java code and provide a clean separation between Java and Sql. Is
there anything more to it?
2. Is there any pooling mechansim for such objects? If we are going for
Session beans+DAO instead of Session Bean+Entity Beans ,won't the absence
of object pooling for DAOs affect the application performance?
3.Are there any special considerations  that need to be taken it account
for application server clustering in case we go in for DAOs?
4. I would like to have some more info into the prons and cons of this
approach versus using Entity beans. Any white papers?

Regards
Anup

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