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

[Wolfgang Laun]

The best way to do that would be to write the field constraints for
testValue to check for exact ranges. You want, for instance  to set percent
to 15 if, and only if

   Test( testValue >50 && <= 80)

As an alternative, write a function percent(int tv) computing the percent
value and do
  rule RuleX
  when
          t : Test( status == 10, $testValue : testValue )
  then
          t.percent = percent( $testValue );
          modify( t );
  end

To have an "or" CE in a decision table, simply duplicate the rule (mostly by
cell reference, not cut-and-paste) and replace whatever needs to be replaced
in the second term of the disjunction.

-W

On Mon, Apr 20, 2009 at 5:51 AM, Manish1985 <pramanish at gmail.com> wrote:

>
> 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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