[rules-users] Action

[Vincent LEGENDRE]

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" <salaboy at gmail.com>
À: "Rules Users List" <rules-users at lists.jboss.org>
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 <LHorton at abclegal.com> 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
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> rules-users at lists.jboss.org
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