Drools Execution, get number of retracted

Question

I'm trying to return the numbers of retracts that a drools session execution have.

I can obtain the number of executions:

...
final Command fireAllRulesCmd = CommandFactory.newFireAllRules("executed-rules");
cmds.add(fireAllRulesCmd);
...
session.execute(CommandFactory.newBatchExecution(cmds));
final Integer executedRules = (Integer) execute.getValue("executed-rules");
....

Are there a similar way to obtain all "retracted-rules"?

Thanks!!

Regards

Answer 1

Implement org.kie.api.event.kiebase.KieBaseEventListener, and in method afterRuleRemoved count the events:

class MyKieBaseEventListener implements KieBaseEventListener {
    private int removedRules;
    public void afterRuleRemoved(AfterRuleRemovedEvent event){
        removedRules++;
    }
    public int getRemovedRules(){
        return removedRules;
    }
    // other methods
}

You have to attach this listener to the KieBase.

kieBase.addEventListener( new MyKieBaseEventListener() );