Re: [rules-users] is there any 'followed by' in Drools as we have in esper

As Wolfgang pointed out, the fist and third pattern can be matched by the same event, leading to your self-joined activations. I would add: eventReq2 : EventRecord( id != $eventReq.id, ..... ) As for the reason why the "cross" join does not lead to an activation: could you please post the "declare @event" too? is timestamp assigned by Drools or by you, and/or are you linking the fusion timestamp to that field? Given the activations you get, it seems that Request2 is given a timestamp preceeding the timestamp of Request1. You could write a debug rule that reacts to a single event and prints its timestamp... when EventRecord( $t : timeStamp ) then //print $t Davide p.s. the explicit check on the timestamp together with the use of "after" seems a bit redundant... -- View this message in context: http://drools.46999.n3.nabble.com/is-there-any-followed-by-in-Drools-as-w... Sent from the Drools: User forum mailing list archive at Nabble.com.