Firstly, We very much appreciate Drools and it's developers. Thanks in advance for the community for any help . To add to my colleague's points, 1. STREAM mode is turned on. 2. We have tried the before operator and it works as expected. 3. We have also tried the auto timestamp as opposed to using a property of the event itself for timestamping. To test sliding time window, we put sleeps between insert of objects to get gaps between the inserts. It would be great if anyone can share some light on what we may be doing wrong. Thanks and Regards, Venkat. -- View this message in context: http://n3.nabble.com/Re-Using-Sliding-Time-Window-usage-in-Drools-Fusion-... Sent from the Drools - User mailing list archive at Nabble.com.

Dear Edson: Thank you very much for your reply and I appreciate you taking the time to do it in such a short time. 1. Let my phrase the following from my understanding from your reply and infer a couple more points. a. The sliding window alone can't be used as a main filter. b. In other words what goes inside the brackets( MyEvent(<filters here>) can only filter the events. c. The sliding window operator results and Event filter results are ORed to provide the final result. Example situation: Event1 9:00:01 Event2 9:00:02 Event3 9:00:03 Event4 9:00:04 Event5 9:00:05 The expression $event: MyEvent() over window:time( 2s ) from entry-point "My Stream" will mean the following for time 9:00:05: a1. Pickup event 1 - 5 since there is no filter supplied within MyEvent()" a2. Pickup event 4-5 since they qualify under sliding window. a3. Create a union of items from Step a1 + a2 to resulting in Event1-5. d. Sliding window is mainly suitable to use as part accumulate functions. I would appreciate your response validating my understanding above. Also it would be useful to know Is there another way to achieve what we are looking for here? Meaning that we simply want to loop over events occurred during some last x period? I am thinking the following may work (After inserting/updating the CurrentTime event every second: declare CurrentTime @role( event ) end declare MyEvent @role( event ) @timestamp(eventDateTime) end rule "Rule1" when $now: CurrentTime() from entry-point "My Stream" //The following should fetch all events occurred in the last 2 seconds) $event: MyEvent(this before[2s, 2s] $now) from entry-point "My Stream" then System.out.println($event.getEventName() + ": Event Occured!!!" + $event.getEventDateTime().toString()); end I greatly appreciate your thoughts as well as others on this. Thanks again for this great piece of software and you taking the time to read, Regards, Venkat. -- View this message in context: http://n3.nabble.com/Re-Using-Sliding-Time-Window-usage-in-Drools-Fusion-... Sent from the Drools - User mailing list archive at Nabble.com.