[rules-users] [FUSION] Detect the absence of an event when you don't know that the event is missing.

[Tina Vießmann]

Yeah, normally I would solve it that way. But you're using a time (1d) 
which I unfortunately don't know off in my scenario.

I'm afraid that there will be no other solution than that I have to use 
a time...

Thanks anyway :)


> Sounds that you can use the Not Conditional Element for that right?
> something like
>
> $a: EventA()
> not EventB(this after[1d] $a)
>
>
>
> On Fri, Oct 22, 2010 at 5:49 PM, Tina Vießmann 
> <tviessmann at stud.hs-bremen.de <mailto:tviessmann at stud.hs-bremen.de>> 
> wrote:
>
>     Hi,
>
>     I'm working on a use case where I want to know if 20 events with a
>     specific value are contained in at maximum the last 150 events. So
>     far I
>     know what have to do. ;-)
>     My problem is that as extension to my condition, the rule shall also
>     trigger if one ore more events are missing. But I don't know the time
>     interval with which the events arrive, so that I don't know when a new
>     event should arrive and by implication I don't know about the
>     absence of
>     an event.
>
>     In our environment events arrive in "counts" and not in a specific
>     time
>     interval as e.g. ever 1 second.  So we talk about the last two or 150
>     counts if we talk about the last two ore 150 data packages received.
>     Yes, behind a count always is a time interval, but only the data
>     source
>     knows about the time interval. My recipient doesn't
>     Also the data of a data package is inserted in the working memory
>     independently, so that I have e.g. 10 data events instead of a single
>     package event.
>     (Now that you know that, my first sentence would be correctly: I
>     want to
>     know if 20 counts of the max. last 150 counts have contained a
>     specific
>     event.)
>
>     If my explanation (or my attempt to explain) is difficult to
>     understand,
>     please ask me what you want to know.
>
>     I would be very happy about any ideas.
>
>     Thank you.
>     Tina
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>
>
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