For a pair of events, the performance will be the same with before/after. If you have more than 2, though, best would be to use sliding windows.
Edson 2010/9/14 Tina Vießmann <tviessm...@stud.hs-bremen.de>: > Hi, > > I've mentioned the test case I'm working on before. It's: If a certain value > exceeds a limit more than X times within Y minutes/hours, do something. > ~> Count = X , time = Y > > During a talk with other developers it came up that by intuition the men > would have chosen a other approach than the women. We can not agree if in > Drools both approaches are the same in performance or if one is more > performant. > > Male approach: If a new event with a limit violation is received, check if > within the last time Y already X events with limit violations are contained > in the knowledge base . > > Female approach: If a new event with a limit violation is received, check if > the following events contain X events with limit violation. This is limited > to a monitoring time of maximal Y. (If there have been X events registered, > before the time Y is elapsed, the window will be closed right away.) > > In code with Y = 1h it would be: > Male: > > // determine new event as $triggeringEvent > $otherEvent : Value (this before[0ms,1h] $triggeringEvent) > > Female: > > // determine event that opened the window as $triggeringEvent > $otherEvent : Value (this after[0ms,1h] $triggeringEvent) > > This is just a extract so that that the comments are in fact meaningless. > The focus lies on before and after. > > > Is one solution more efficient? > > > Thanks! :) > Tina > > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
