First solution is the one I use almost all times, and moving facts from a
session to another is far less costly than propagating facts for rules that
will never be fired...
The second solution could be great too, but I am not sure that it will cut all
propagations. If you have this :
rule "unused"
when
exists ControlFact("some_group_id")
MyFact(att == value1)
then
...
end
I am prety sure that MyFact(att == value1) will generate a node which will be
updated at each MyFact insert/update/retract, regardless of the first condition
is true or not ... but may be I am wrong ...
Globally, my advice is : if you can partition your rules in independant groups,
do it really and create independant sessions (especially if performances become
critical).
----- Mail original -----
De: "Mauricio Salatino" <[email protected]>
À: "Rules Users List" <[email protected]>
Envoyé: Mercredi 21 Décembre 2011 18:28:52
Objet: Re: [rules-users] Action
It depends on your problem, but yes.. it could be more efficient,
except for the fact that you need to move all the objects from one
session to the other.
Another alternative is to use some kind of control fact that only
activate the second group of rules when the first group has been
evaluated.
Cheers
On Wed, Dec 21, 2011 at 2:25 PM, lhorton <[email protected]> wrote:
> So if we have, for example, a set of rules that we know only need to be
> evaluated under certain conditions or for discrete types of Facts, would it
> be more efficient to put them in a separate knowledge sessions?
>
> Meaning, instead of one session where we insert all objects and then fire
> agenda-group-1 and then agenda-group-2, we have knowledgeSession1 and
> knowledgeSession2, insert only the facts relevant to each session, and fire
> all rules on each session.
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/rules-users-Action-tp3604296p3604632.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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