With BMP, bean "persistence" is what you make of it. Hence you can
implement your ejbLoad/ejbStore to "read" from a static singleton, from JMS,
or a combination of both which will in effect mimic a cluster-wide
synchronized in-memory cache.
Gene
ZHU Jia wrote:
>
> Hello!
>
> As far as I understand, there's no way to cache states across sessions
> in EJB, right? Then how can I accomplish this:
> We have some chained Java objects to be converted into EJBs, and these
> objects perform quite costly operations. But the data these operations
> return should only be temporary
> so it wouldn't really make sense to model it in the DB. For the sake
of
> performance, we put the data in a buffer and use a flag to check
whether
> the condition has changed, and only
> recalculate the whole thing if there's any change. But with EJB, I
> cann't really hold a buffer in the bean because I don't have any
control
> over the life cycle of the bean:-(
> Well, to rephrase my question, is there some way to retrieve some
cached
> state from EJB without resort to persistent storage?
> Any hint or tip will be highly appreciated and many thanks in advance!
>
> regards
> ZHU Jia
>
>
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