[rules-users] Accumulate function

[Matteo Cusmai]

Hi Vincent,
i have an rfid reader and i am collecting tagid from that sensor.
I would like to raise an event when the number of different tags in a time
interval is greater than 20 (for example).



On Tue, May 22, 2012 at 2:33 PM, Vincent LEGENDRE <
vincent.legendre at eurodecision.com> wrote:

> No.
> You can't use $obs before you bind it (2nd pattern)
> The binding done for accumulate pattern must be used in some accumulate
> fonction in order to be seen outside.
>
> Instead of trying to fix your rule, may be you can describe (with simple
> phrases) what you are trying to do ?
>
> ------------------------------
> *De: *"Matteo Cusmai" <cusmaimatteo at gmail.com>
> *À: *"Rules Users List" <rules-users at lists.jboss.org>
> *Envoyé: *Mardi 22 Mai 2012 12:33:16
> *Objet: *[rules-users] Accumulate function
>
>
> Hi all,
> i am going to use a custom accumulate function like that:
>
> rule "CrowdInAreaEvent-event"
>     no-loop
>     when
>         $RFIDReader : SensorFixed(type == Sensor.SENSOR_TYPE_RFID,
> $coverageArea : areaOfInterest )
>         not CrowdInAreaEvent( sensor == $RFIDReader, this meets[ 5s ] $obs
> )
>         $count : Integer( intValue > 10 )
>             from accumulate( $obs : RFIDObservation( $tagid : tagid,
> sensor == $RFIDReader )
>             over window:time( 60s ) from entry-point lowLevelSensorStream,
> countDistinct( $tagid ) );
>     then
>         insert( SituationManager.createCrowdInAreaEvent( "Crowd, number
> people: " + $count, Event.THREAT_LOW, $coverageArea, $RFIDReader, $count,
> 60, 10 ) );
> end
>
> I need to refer $obs object in order to compare timing of new observation
> with last event. Is it possible to do that?
>
> Thanks a lot,
> Matteo.
>
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