Re: [rules-users] Stateless Vs Stateful Sessions in Webtier
On Wed, Jan 20, 2010 at 12:41 PM, Simon Thum <simon.thum(a)gmx.de> wrote:
Pritam wrote:
> Drools says, for rules itself, "it doesn't matter whether you use stateless
> or stateful ksession ..." then why is that an entire set of metadata like
> grouping and ordering is ignored?
As I understood it, a stateless session behaves as if the only object
known to it is the one you just inserted.
The correct description, according to the Drools Expert manual, would be
that a stateless session considers all facts that are initially inserted (which
definitely may be more than one).
Personally, I look at it like:
stateless -> propositional logic
stateful -> first-order logic
This is a false proposition ;-)
'not', 'exists' and 'forall' - Drools' support for first-order
logic
quantifiers - is
fully available (such as all the other features for LHS) in a stateless session.
-W
I'm not sure that's 100% true though. In any case, it depends
on the
kind of questions you like to ask. If you're not sure, test it.
Cheers,
Simon
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