[rules-users] problem in firing dependent rules..

[Edson Tirelli]

   Sudhir:

   In Rete, you must tell the engine a fact has changed, either by using a
modify() block (recommended), or update() or property listeners.

   LEAPS is a different algorithm that was originally maintained by a
community user that long ago abandoned it. It is no longer included in the
drools distribution.

   []s
   Edson

2009/1/9 Sudhir M <sudhir.cse at gmail.com>

> Hi All,
> I don't know whether I have encountered a strange problem or my
> understanding of drools is wrong.
>
> I have 3 rules out of which two are dependent. Between the dependent ones
>  one rule makes the other rule eligible to fire but I don't know why the
> dependent rule is not firing. Below are the rules I have written.
> package com.valueMomentum;
> import com.valuemomentum.eligibilitymodel.oo.*;
> import java.util.ArrayList;
> global java.util.ArrayList list;
>
> rule "PolicyTierClassification"
>  no-loop true
>  when
> healthInsuredbindings : HealthInsured( weight >= 134 , weight < 157 ,
> height == "4ft 10in" , gender == "Male" )
>
>  then
> healthInsuredbindings.setPolicyTier("Standard I");
>
> System.out.println("PolicyTierClassification");
> list.add("To determine tier based on insured gender, height and
> weight(weight>=134 , weight<157 , height==4ft 10in , gender==Male ) ->
> (PolicyTier = Standard I)"); ;end
>
> rule "AlcoholConsumptionClassRule"
>  no-loop true
>  when
> healthInsuredbindings : HealthInsured( alcoholConsumptionFrequencyPerWeek
> == "2-3" )
>
>  then
> healthInsuredbindings.setAlcoholConsumptionClass("B");
>  System.out.println("AlcoholConsumptionClassRule");
> list.add("To derive the alcohol consumption class based on consumption
> frequencyalcoholConsumptionFrequencyPerWeek==2-3 -> (AlcoholConsumptionClass
> = B)"); end
>
>
> rule "UnderwritingFactorRule"
>  no-loop true
>  when
> healthInsuredbindings : HealthInsured( alcoholConsumptionClass =="B" )
>
>  then
>  healthInsuredbindings.setUnderwritingFactor(1);
>  System.out.println("UnderwritingFactorRule");
>      list.add("To derive UnderwritingFactor from
>  alcoholConsumptionClass==B -> (UnderwritingFactor = 1)");end
>
> this my initial fact HealthInsured healthInsured = new HealthInsured();
>  healthInsured.setAge(25);
> healthInsured.setGender("Male");
>  healthInsured.setWeight(140);
> healthInsured.setHeight("4ft 10in");
>  healthInsured.setTobaccoUser("No");
> healthInsured.setMotorcycleRider("No");
>  healthInsured.setRelationToInsured("Insured");
> healthInsured.setUnderwritingFactor(0);
>  healthInsured.setPolicyTier("Preferred");
> healthInsured.setAlcoholConsumptionFrequencyPerWeek("2-3");
>  healthInsured.setAlcoholConsumptionClass("A");
> Based on the above fact PolicyTierClassification, AlcoholConsumptionClassRule
> are eligible  to fire. AlcoholConsumptionClassRule  is setting a property
> alcoholConsumptionClass to B based on which UnderwritingFactorRule rule
> becomes eligible fire but in this case the dependent rule is not firing. I
> think we can use update in  AlcoholConsumptionClassRule  but I think if we
> have to manage those dependencies it will be more error prone and the
> results are might be more inconsistent.
>
> I have tested it Using RETEOO in drools 3.x and 4.x which yields me the
> same results. But when I used LEAPS algorithm then i even got the dependent
> rule i.e UnderwritingFactorRule  rule  also fired.
>
> Thanks in Advance,
>
> sudhir.
>
>
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>
>


-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com
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