Any help with the query below would be much appreciated. I am assuming that event retraction is not automatic using the pattern below, however I am trying to come by an approach to ensuring only one event exists on an entry point at any moment in time. One thought was that when a rule inserts a new event, it first retracts the previous event, although I think that a rule cannot have state and can therefore not maintain a handle to the previously inserted event?

What would be a good approach to achieving this? Many thanks, James jwillans2 wrote: > > Hello, > > I am using sliding windows in the form: > > Obj(..) over window:length(1) from entry-point EP1 > > Where many events are being inserted into EP1. Reading the documentation > I expected Drools to infer from the window length that all events on EP1 > apart from the latest one can be retracted, is this correct? The reason I > ask is that I am not seeing retraction of events from EP1 when I debug the > session, and I am see behaviour which suggests the rule is firing against > old events on the entry point. > > Basically I want to get to simulate that an entry point can only contain > one event at any point in time and that this event is the latest one to > arrive. > > Thanks, > > James > -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Sliding-windows-and-e... Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users