[rules-users] before/after behavior for negative pattern

[Rob21]

Hi all,
I try to detect the beginning of a scenario which is characterized by an
event happening after no other event of the same type has happened in the
last 90sec.
I can't understand why only the first of those two rules is working.

rule "Detect Scenario beginning"
    when
        $start : RawEvent()
        not RawEvent(id == $start.id, $start after[0ms, 90s] this)
    then
    System.out.println($start);
end

rule "Detect Scenario beginning alt"
    when
        $start : RawEvent()
        not RawEvent(id == $start.id, this before[0ms, 90s] $start)
    then
    System.out.println($start);
end

Moreover if the first sent event is a rawEvent none of them will detect it.
Where am i wrong ? (still a beginner with drools)
PS : I already posted it on the forum, but i forgot to complete all the
subscription steps so it was rejected. Sorry for the double post.



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