[jboss-user] [jBPM] - Re: jBPM5 - Can't Scale, Won't Scale

[Wooi Joe Chuah]

Wooi Joe Chuah [https://community.jboss.org/people/joe.chuah] created the discussion

"Re: jBPM5 - Can't Scale, Won't Scale"

To view the discussion, visit: https://community.jboss.org/message/809713#809713

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Hi,

I'd also like some clarification on this part where you mentioned :
> A session is the runtime interface to talk to the engine, so you do need it.  But you are right, when you don't need any rule-related persistence etc., you probably don't need some of this "advanced" session management.  In situations like this, the two most common architectures are:
>  * Session per request: if your session doesn't contain any state and you don't use any timers, you can just instantiate a session on request and dispose it afterwards
>    -> session mgmt is fairly simple, just create / dispose every time
>  * Singleton session (or as extension N sessions): you have a service that reuses the same session(s), and keeps these sessions alive at all time (to support timer execution), possibly distributed across a cluster of nodes
>    -> no disposal of sessions
> 
> Kris
Does this mean that if I do not have any rule-related persistence, just using the session to start process instances and signal events it is alright to use a singleton session?
Eg. Hundreds or thousands of process instances executed in the same session will not have any ill effects?

Or I should stick to the session per request and dispose it afterwards. (provided the process instance can continue execution in a separate session)

Thanks
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