It would not be impossible to define a "first-rule-wins" group, where the first rule to fire may keep on doing so, locking out all others. But this is an incomplete definition; you'd also have to specify how long the lock-out effect should remain. If this isn't for the entire duration of the session, then what?

Not knowing the actual conditions and other details I cannot really make a positive statement, but there's some doubt in my mind whether the stated problem might not be solved by using "complete" conditions.

-W

2010/12/17 Yaniv Itzhaki <iyaniv@gmail.com>

Thanks for your help

I was looking for internal drools feature to solve this issue (this is what i meant by etc..).

2010/12/16 Bruno Freudensprung <bruno.freudensprung@temis.com>

Hi,

I don't know if it is the best solution since I am very new to Drools but you could use a logical insert of a "Skip" fact. Something like:

rule "A1"
salience 100
ruleflow-group "A"
activation-group "A"
when
        xxx1
then
       yyy1

       insertLogical(new Skip());

end

rule "A2"
salience 90
ruleflow-group "A"
activation-group "A"
when

        not Skip()
        xxx2
then
       yyy2
end

Bruno.

Yaniv Itzhaki a écrit :

any ideas anyone?

On Thu, Dec 16, 2010 at 12:36 PM, Yaniv Itzhaki <iyaniv@gmail.com> wrote:

Hi,

I have a group of rules with salience which I would like that only the first activated rule will fire.

I cant use the activation-group attribute because each rule can fire number of times, and i want only this rule to be fired in that group:

rule "A1"

salience 100

ruleflow-group "A"

activation-group "A"

when

        xxx1

then

       yyy1

end

rule "A2"

salience 90

ruleflow-group "A"

activation-group "A"

when

        xxx2

then

       yyy2

end

If Rule A1 run (activated number of times), rule A2 should not run.

Is there a way to do that? (no global flags etc.)

Thanks

Yaniv

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