CODEWITHSUNDEEP
drools
Manish Mulani
Manish Mulani

Reputation: 7375

Firing selective rules from drool file

Is it possible to fire rules in drool file by rule names ? My requirement is, my rule file will contain list of all rules (S). But I've a separate config which contains list of rule names to be fired (A). Note (A) is a subset of (S). At run time, I want to fire only rules with names (A) from (S).

Thanks.

Upvotes: 2

Views: 9878

Answers (1)

Toni Rikkola
Toni Rikkola

Reputation: 983

You can use AgendaFilters for this.

Here is how you set it:

StatelessSession session = ruleBase.newStatelessSesssion();

session.setAgendaFilter( new RuleNameMatches("<regexp to your rule name here>") );

This will allow only one rule with the specified name to fire.

In your case you will need to write your own AgendaFilter:

public class CustomAgendaFilter extends AgendaFilter{

  private final Set<String> ruleNamesThatAreAllowedToFire;

  public CustomAgendaFilter(Set<String> ruleNamesThatAreAllowedToFire){
    this.ruleNamesThatAreAllowedToFire=ruleNamesThatAreAllowedToFire;
  }

  boolean accept(Activation activation){
    return ruleNamesThatAreAllowedToFire.contains(activation.getRule().getName());
  }
}

Upvotes: 8

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