[rules-users] I want only first rule to be executed even more than one rule are fulfilling the LHS

[Lindy hagan]

I don't know much about drools, am still evaluating drools, we have a
similar scenario that as soon as a rule is satisfied, should not check for
other rules.

looking at the manual for activation-group , my understanding is that  if
you have 10 rules under same activation group always the one with high
salience will fire ignoring other rules. (correct me if i am wrong.)

Probably we need to set some flag to check whether the previous rule is
processed or not.

2009/4/20 Edson Tirelli <tirelli at post.com>

>
>    Take a look at the manual on "activation-group"s. They allow you to do
> that.
>
>    Also, you can call fireAllRules(1) to fire only one rule, in case your
> whole rulebase is like that.
>
>    []s
>     Edson
>
> 2009/4/19 Manish1985 <pramanish at gmail.com>
>
>
>> Hi All,
>>
>> Assume that following is the case,
>>
>> rule "Rule1"
>>
>>        when
>>                t:Test(status==10)
>>                Test(testValue > 90)
>>
>>        then
>>                t.percent=5;
>>                          modify(t);
>>
>> end
>>
>>
>> rule "Rule2"
>>
>>        when
>>                t:Test(status==10)
>>                Test(testValue> 80)
>>
>>        then
>>                t.percent=10;
>>                          modify(t);
>>
>> end
>> rule "Rule3"
>>        when
>>                t:Test(status==10)
>>                Test(testValue  > 50)
>>        then
>>                t.percent=15;
>>                          modify(t);
>>        end
>>
>> Here, based on each condition i will assign percentage value.
>> Assume that testValue is 100 and status is 10 so it will be evaluated true
>> for each rule
>> but i dont want that. i want Rule1 to be evaluated and then it should stop
>> executing other rules other wise percetage value will be different from
>> what
>> i want.
>> (15 instead of 5).
>>
>> I can do this by adding one more condition in every rule like
>> Test(percent==0)
>>
>> and initially i will intialize Test.percent by zero so only first Rule
>> will
>> be evaluated/executed.
>>
>> But is there any other way apart from these?
>>
>> One more thing is that in decision table i want to add OR between two
>> conditions.
>> How can i do that? please give me example for doing that.
>>
>> Thanks a lot in advance.
>>
>> Regards,
>> Manish
>>
>> --
>> View this message in context:
>> http://www.nabble.com/I-want-only-first-rule-to-be-executed-even-more-than-one-rule-are-fulfilling-the-LHS-tp23080560p23080560.html
>> Sent from the drools - user mailing list archive at Nabble.com.
>>
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>>
>
>
>
> --
>  Edson Tirelli
>  JBoss Drools Core Development
>  JBoss, a division of Red Hat @ www.jboss.com
>
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>
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