----- Original Message -----
From: "Anup Maliyackel" <[EMAIL PROTECTED]>
> 1)Everybody (including sun) agrees to some extent that entity beans are
> performance bottlenecks and they don't scale well. Can somebody elaborate
> on this?
You will have to send me a link on this one. I have a hard time believing that
Sun considers entity beans to be performance bottlenecks. Inless of course, they
imply that persisting data is a performance bottleneck. If that's the case, I
agree. ;-)
> 2)How do different implementations of Entity beans differ in terms of
> clustering in different app. servers?
Entity bean design does not differ in a clustered environment. There was a time
when WebLogic was advocating a pessimistic locking scheme in their standalone
containers. When developers leveraged this in their design, they discovered
problems when moving to a clustered environment. Lesson learned, the database is
the only true locking mechanism.
> 3)If entity beans are not the way to go,what next? ; Session Beans+DAO; JDO
> etc?
Give me a reason why I would want to use JDO instead of CMP Entity Beans. DAO
means nothing. It's just an implementation pattern. For example, I use DAO when
writing BMP Entity Beans.
> 4) what is the status of JDO specs? Can we expect something anytime soon?
Not much news yet...
http://java.sun.com/aboutJava/communityprocess/jsr/jsr_012_dataobj.html
jim
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