Good idea,
but note that it will only work properly in a stateless session (which
is most likely in his case).
In a stateful session, with multiple fireAllRules and when the
applicant's properties change between those fireAllRules call,
the trick is to do an insertLogical of a ScoreDiff instead of setScore()
and then add 1 general rule to accumulate all those ScoreDiffs and put
the resulting score into the Result.
Op 23-11-11 10:56, Michael Anstis schreef:
Why not use a Fact that contains your result?
In DRL terms it'd look like this:-
rule "one"
when
$r : Result( $score : score )
Applicant( numberOfLoans > 1 )
then
$r.setScore( $score + 5 );
update( $r );
end
rule "two"
when
$r : Result( $score : score )
Applicant( disposableIncome < 20000 )
then
$r.setScore( $score + 10 );
update( $r );
end
The result could equally just contain the factors influencing the
score with a low salience rule then calculating the final score:-
rule "one"
salience 100
when
$r : Result()
Applicant( $nl : numberOfLoans )
then
$r.setNumberOfLoans( $nl );
update( $r );
end
rule "two"
salience 100
when
$r : Result()
Applicant( $di : disposableIncome )
then
$r.setDisposableIncome( $di );
update( $r );
end
rule "calculate score"
salience 200
when
$r : Result( $nl : numberOfLoans > 1, $di : disposableIncome <
20000 )
then
$r.setScore( 20 );
update( $r );
end
On 23 November 2011 09:44, lansyj <lans...@gmail.com
<mailto:lans...@gmail.com>> wrote:
hi folks
We are working on a requirement that requires us to have multiple
rules that
could fire for a given input and for all the rules that fire, we
would want
to cumulate the consequence to reach the final consequence.
As an example, if we want to identify the credit score for a
person, based
on his gender you might want to assign/increment/decrement the
score, then
based on nationality, and so on.
So, considering the long list of such criteria, having rules that
cover all
scenarios and are still mutually exclusive isnt a scalable
solution. Could
you please advice on how this could be achieved.
We run Drools 5.1.1 and Guvnor; rules are made using the guided
editor with
DSLs.
Awaiting your support,
Best Regards
-lj
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