> Now I'm using WebLogic, whose EJB support, as I understand it, is supposed
> to offer me a more open way of accessing these kind of services. But I
> don't see where EJB addresses any of these questions.
There is a good article out there that explains
the concepts of EJB with respect to scalability.
You find it here: http://www.objectwatch.com/issue18.htm
(ObjectWatch Newsletter 18 - In the Fishbowl; Scalability in EJB and MTS)
To summarize its main points:
- The spec. doesn't define any specific mechanism for pooling and
db connection reuse
(in fact Weblogic and others do a lot of fancy things on that...)
- But: EJB does not use a Just-In-Time-Activation algorithm for
instance management; instead it uses another instance management
algorithm called Instance Pooling.
(the middle tier instances - session or entity beans -
are themselves pooled, not the db conn.)
With regards,
Martin
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