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

[Tina Vießmann]

The events contain a field with a source time. Refering this time the 
events can be compared. It has to be done this way, because unlike the 
source times the receive times aren't synchron.

In my case, the testing for missing elements is more complex than:
   $a: EventA()
   not EventB(this after[1d] $a)
Because there may be the events A, C, D, E and F and it should be 
noticed, that there's B missing between A and C. But I have no hint 
about that, because the events are neither numbered nor do I know there 
should be a event B with a time A.time+Xseconds.


> You can use it without time.. but each time that you have an EventA 
> and not an EventB the will be activated
>
> 2010/10/22 Tina Vießmann <tviessmann at stud.hs-bremen.de 
> <mailto:tviessmann at stud.hs-bremen.de>>
>
>     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
>>         _______________________________________________
>>         rules-users mailing list
>>         rules-users at lists.jboss.org <mailto:rules-users at lists.jboss.org>
>>         https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>
>>
>>     -- 
>>      - CTO @ http://www.plugtree.com
>>      - MyJourney @ http://salaboy.wordpress.com
>>      - Co-Founder @ http://www.jbug.com.ar
>>
>>      - Salatino "Salaboy" Mauricio -
>>
>>
>>     _______________________________________________
>>     rules-users mailing list
>>     rules-users at lists.jboss.org  <mailto:rules-users at lists.jboss.org>
>>     https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>     _______________________________________________
>     rules-users mailing list
>     rules-users at lists.jboss.org <mailto:rules-users at lists.jboss.org>
>     https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
> -- 
>  - CTO @ http://www.plugtree.com
>  - MyJourney @ http://salaboy.wordpress.com
>  - Co-Founder @ http://www.jbug.com.ar
>
>  - Salatino "Salaboy" Mauricio -
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20101024/d8f18872/attachment.html