[rules-users] Drools Fusion: Finding an event that occuring after an event but not before it

I am trying to track when an event object Foo with a distinguishing identifier of Status. I want to try and identify a list of events when a Foo event with Status 2 happens after an event with Status 1 but at the same time a Status 1 has not happened before. fight now I've come up with: $foo1 : Foo($status : Status) not(Foo(Status == $status. this before $foo1)) $foos : ArrayList (size>0) from collect ( Foo(Status != $status, this after $foo1)) Part of the problem I am having, is that a Foo event with the same Status can happen at the same timestamp. How do I get it to work so the rule only triggers once for multiple events on the same timestamp? -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Fusion-Finding-an-event-that-occ... Sent from the Drools: User forum mailing list archive at Nabble.com.