My rules are  as follows.
rule "rule1"
    salience -2
    dialect "mvel"
    when
    stud : Student ( field == "ARTS", state.equals("WA"))
then
    java.util.List subList = new java.util.ArrayList();
    Subject subject = new Subject();
    subject.setName("ABC");
    subject.setFees(33454);
    subject.duration(4);
    subList.add(subject);

    subject = new Subject();
    subject.setName("XYZ");
    subject.setFees(33454);
    subject.duration(4);
    subList.add(subject);

    stud.setSubjects(subList);
end
rule "rule2"
    salience -100
    dialect "mvel"
    when
    stud : Student ( field == "ARTS", state.equals("WA") , city == "SEATTLE"))
then
    java.util.List subList = new java.util.ArrayList();
    Subject subject = new Subject();
    subject.setName("ABC");
    subject.setFees(33454);
    subject.duration(4);
    subList.add(subject);

    subject = new Subject();
    subject.setName("XYZ");
    subject.setFees(33454);
    subject.duration(4);
    subList.add(subject);

    stud.setSubjects(subList);
end



Student is the main object and it contains List of Subjects. here the way I am using the salience because
if the input us shweta, ARTS, WA,Olympia it matched rule1
but if the input is shweta, ARTS, WA, Seattle it matches 1 and 2 but i want the rule 2 to be executed  so salience.

I am using StatelessKnowledge Session and also the resource change scanner.
I execute one rule at a time and the scanner poll interval is 1 hour.
When I started with 100 rules I was using "PK" as my source in changeSet.xml but when the rules grew to 20K I was not able to build the rules in Guvnor UI and hence I started using "DRL" as source.

The way I generate drl is using a script which converts the csv to drl format.
I copy the drl to the text area in techincal rules and save it. ( this copy is also paiful so I asked that if there is an upload drl file unlike the import drl file)
In changeset I give the path to the url in webdav /guvnor/org.drools.guvnor.Guvnor/webdav/packages/StudentRules/StudentRules.drl

I am not sure if I am doing it the right way. Please suggest.

Thanks,
Shweta

On Mon, Jan 9, 2012 at 11:58 PM, laune [via Drools] <[hidden email]> wrote:
Salience is just one way to force the evaluation of a condition before others. In fact, using salience throughout is just a way of re-creating a sequence of plain old if statements using a rules engine.

I'm not going to waste my time and yours by elaborating on possible alternatives unless you come up with a detailed description of your rules, and how you run your rules engine: fact insertion, calls to fire, etc.

-W

2012/1/10 Shweta1986 <[hidden email]>
I am not sure I understand that. What is the other option for this case. Why would simple rules not work for 20 K rules. Am I missing something. I cannot use database to store my rules. Drools also gives me salience which I need for my usecase.

On Thu, Jan 5, 2012 at 11:29 PM, laune [via Drools] <[hidden email]> wrote:
2012/1/6 Shweta1986 <[hidden email]>

And my rules are very simple it is like if string comparison then set that's it..

This doesn't really warrant the use of a rule based system. If keeping this logic out of the application or an easy maintenance of these if-then's are your main goals, there are other ways. I've already hinted at this, with the idea of providing the information embedded in similar rules as data.
-W

 

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