Hey
Charles Paclat wrote:
>
> Ian Mcallion wrote:
>
> >-Not so. Two transactions concurrently accessing the same logical entity
> bean
> >instance will get two in-memory copies of the instance.
>
> Is this in the EJB spec, or is it an implementation detail?
The generic answer:
The EJB spec. defines the contracts between the clients, the beans and
the containers. Any implementation that follows these contracts is a
"compliant" implementation.
The specific answer:
This is an implementation detail, and it is shown in the spec. as an
example of a possible interpretation/implementation. Some servers may
choose to do it this way, while other may choose to serialize calls to
one instance. Which is the best is completely reliant on the particular
application. If the degree of contention in the application is high, a
instance-per-transaction implementation would be recommended, and if not
then a single-instance implementation would be recommended.
/Rickard
--
Rickard �berg
@home: +46 13 177937
Email: [EMAIL PROTECTED]
Homepage: http://www-und.ida.liu.se/~ricob684
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