In java, I can check to see if a 2 variables references the same instance as such: Object a = new Object(); Object b = a; a == b Is there a way to do this in Drools? For instance, if there is an object in working memory and it is a specific instance, I do not want to fire the rule again. ie: rule "User Lookup UserKey" salience 10000 when com.kronos.taws.model.User(empId == null, $key:empIdKey) then System.out.println("Firing 2!"); insert($key); end I want to ensure that $key is not already in working memory. But mind you, there might be other $keys that are in working memory that do not belong to this particular com.kronos.taws.model.User instance. I do not want this rule to fire because I have subsequent rules that will make empId a value other than null. I attempted to do this: rule "User Lookup UserKey" when com.kronos.taws.model.User(empId == null, $key:empIdKey) not UserKey(this == $key) then System.out.println("Firing 2!"); insert($key); end However, I still think this is doing an equality check because once the $key object is updated in another rule, this rule is fired again! Thanks in advance! Eric _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users