when I was testing the sliding windows, I was blocked becouse this concept doesn't work for me, It's becouse of my misunderstanding of the concept, I looking for the error which I do: for exemple: ==> the rule: */ rule "sliding windows" when $a : Event1() over window:time(2s) then System.out.println("ok"); end /* ==> Events Event1 ev1=new Event1((long)1000,(long)2000); // the event will occur in 1s and finish in 3s Event1 ev2=new Event1((long)3000,(long)4000); // the event will occur in 3s and finish in 4s session.insert(ev1); session.insert(ev2); clock.advanceTime(4, TimeUnit.SECONDS); // we are now in 4s so only event that happen in [2s,4s] have session.fireAllRules(); // to fire -ev2-. // But the probleme that, it gives me 2 ok so the 2 object are fired !! I don't inderstand why ?? -- View this message in context: http://drools.46999.n3.nabble.com/A-problem-in-sliding-windows-tp3781402p... Sent from the Drools: User forum mailing list archive at Nabble.com.