Hello Drools Experts,

I have a question on activation group and trying to understand the mechanism.

I have the following rules in a .drl file :

import function com.test.utils.StringUtil.isEmpty;
import function com.test.utils.Logger.log;

rule "r1"
salience 10
activation-group "fireOnlyOnce"
when
     SomeObject($s: someStringKey)
     eval(isEmpty($s) // static java method imported as function
then
      log("doSomething");
end

rule "r2"
activation-group "fireOnlyOnce"
when
     SomeObject($s: someStringKey)
     eval(checkWithDB($s) // Make a call to the DB to validate someStringKeyis valid
then
      log("doSomething");
end

In "r1" I am checking for 'someStringKey' is not null or empty. In "r2" , I am making a call to the DB to check 'someStringKey' is a valid id. During the debug, I found out that both "r1" and "r2" is fired but only one consequence is executed depending on the outcome of the r1. I want "r2" to fire only when "r1" evaluates to false. How can I achieve this in Drools?

Thanks for your time and appreciate your help.