How to recognize and verify a simple sequence of events with drools fusion

Question

I'm unable to find the best way (the drools fusion way actually) to count "A" events between "B" events (STREAM mode). An example of sequence could be:

B A A A B A A B A...

A use case could be

verify a sequence validity i.e there is always 3 "A" events between each "B" event

I don't know if the "window over" concept is appropriate in such a situation. Thanks for your help, I still have some difficulties to think in CEP way.

Answer 1

Two Drools versions cause two different behaviors (same Unit Test). So I think my misunderstood comes from a bug in "windows" behavior. I can't be more specific this time.