I think DAO is a little more generic. A DAO could just hold methods to
access data, it doesn't necessarily have to stay in sync with the database
the way a JDO would.
>From: Raju Kolluru <[EMAIL PROTECTED]>
>Reply-To: A mailing list for Enterprise JavaBeans development
><[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: Entity beans vs DAO(Data Access Objects)
>Date: Thu, 22 Mar 2001 11:32:13 -0800
>
>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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