Very interesting.
For real world modeling, I don't see how EJB's abstract you away from
locking in to a persistence layer (dependenat objects and sets), at least
until the EJB2.0 spec is there.
I've implemented my BMP EJB's using a JDO type persistence layer we wrote,
which combines the JDO spec from the ODMG (same as Castor) but have
implemented a few other bits like JDBC interceptors for injecting caching
pools (or not) as well as using the ideas in Connectors for security
interceptor injections (for using Oracle's FGAC, or using the security from
things like Peoplesoft).
I was quite juiced on this until ... I saw the the JDO, EJB2.0 and JMS query
styles ... all of which are different. Why is that?
I also very much dislike the post processing being touted for JDO as you
need to do a bunch of Magic to get around classloader security, etc. I much
prefer the straightforward style of JDO as available by most OODB vendors.
I still like Entity beans, but I use them as agregators, not a 1-1 table
mapping thing. This gives me a transactional component, like an Order,
which takes care of it's own order-items, etc. Rather than implementing it
as several Entity Beans that work together. I see this being a easier thing
to do with the EJB2.0 spec, or within the EJB1.x spec with a lockin to a
particular JDO or PersistenceLayer vendor.
Thor HW
----- Original Message -----
From: "Floyd Marinescu" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, August 25, 2000 12:51 PM
Subject: Java Data Objects vs. Entity Beans
> It seems to me that Java Data Objects are what Entity Beans should have
> been. I would like to open discussion on this topic.
>
> Check out my post:
> http://theserverside.com/discussion/thread.jsp?thread_id=771
>
> thanks, take care EJB Guru's!
>
> Floyd
>
> ---------------------------------
> Senior Architect / Director of Marketing
> The Middleware Company
> http://www.middleware-company.com
> http://www.TheServerSide.com
> [EMAIL PROTECTED]
> 416-889-6115
>
> Check out TheServerSide.com, the internets first J2EE community!!!
>
>
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