Hi,
Is DAO same as JDO (java database objects) or is it one more "data objects
access" api by sun ?
-Raju
Anup Maliyackel wrote:
> 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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