On Feb 1, 2008 8:35 AM, Jai Vasanth <jaivasanth@gmail.com> wrote:

Thanks. That helped.

On Feb 1, 2008 7:31 AM, Anstis, Michael (M.) <manstis1@ford.com> wrote:

Excuse me if you already understand but there is a difference between rule patterns being evaluated and their consequence running.

Rules LHS are evaluated when objects are inserted into working memory whereas the consequence fires when you call fireAllRules();

The rules whose activations are executed are those in the given Agenda Group; thereafter those not in any agenda group execute. So if all rules are in an Agenda Group you should be OK.

Of course they don't prevent all rule patterns from being checked as objects are inserted into WM (which has a performance impact) but this is what the RETE network was designed to optimise.

You could try another configuration (but I think Agenda Groups are probably the preference by design). This gives complete isolation - but I haven't tried it so it might not even be possible ;-)

global WorkingMemory wm;

global RuleBase rbX;

global RuleBase rbY;

rule "Group X"

    when

        Fact( attribute == "condition1" )

    then

        wm = rbX.newStatefulSession();

        wm.fireAllRules();

end

rule "Group Y"

    when

        Fact( attribute == "condition2" )

    then

        wm = rbY.newStatefulSession();

        wm.fireAllRules();

end

Good luck.

Mike

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Jai Vasanth
Sent: 01 February 2008 15:07
To: Rules Users List
Subject: Re: [rules-users] Grouping rules

Thanks for responding
Yes, I did consider agenda groups, but I thought agenda groups only ordered execution in a particular fashion, so if Rule "pick group X" fires then it would make sure that rules in Agenda Group X fire first before the remaining but the remaining would fire eventually. Is my understanding correct ?
I am looking for a solution for completely isolating a rule set conditioned on an object attribute.

On Feb 1, 2008 12:46 AM, Anstis, Michael (M.) <manstis1@ford.com> wrote:

What about Agenda Groups?

Rule "pick group X"

when

    Fact( attribute = "condition1" )

then

    drools.setFocus("Group X")

end

Rule "pick group Y"

when

    Fact( attribute = "condition2" )

then

    drools.setFocus("Group Y")

end

Rule "Group X1"

Agenda Group "Group X"

when

    Smurf( )

then

    // Do something

end

Rule "Group X2"

Agenda Group "Group X"

when

    Smurfette( )

then

    // Something else

end

etc

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Jai Vasanth
Sent: 31 January 2008 19:45
To: rules-users@lists.jboss.org
Subject: [rules-users] Grouping rules

Hi,

I am building a system where I would need to fire different sets of rules based on some attribute in the fact object.

Here are someways which I thought of, I was wondering if there was something better than that.

1) I could do this by creating different sessions based on the data attrbute (different sessions would have different rule packages based on the attribute)

or

2) Have all the rules fire (all the different sets of rules) irrespective of the attribute and have them insert fact new objects into the working memory. In the second round of rules, collect the (newly made) fact objects based on the attribute and take that action.

Thanks

Jai

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