Thanks for your kind reply! [EMAIL PROTECTED] schrieb: > What do you think about stateful session beans? > For example, if you take the stateful session bean, you have the > conversational state. Having the big cache you can expect that your bean > will remain in memory. At least, when the bean is to be removed from the > cache, you'll get a passivation event (ejbPassivate). And you can start your > calculations on activation (ejbActivate) or creation (ejbCreate). The problem with session bean is, as far as I understand, every session is unique. So if I calculate the state in one session, then it won't be accessible next time I invoke the session bean, although the data has not changed. I can never get to the same session bean again, which defeats the purpose of caching. > Also I do not see any problem with storing buffer content in serialized form > into some database record. If you say that calculations are costly, then > storing data in DB will not be so costly, probably even less than 1% of the > total execution time. Not really sure about it myself, maybe it's the last resort if everything else failed;-) regards ZHU Jia _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user