Hi,
I'm quite intrigued by this question also myself, I would like to know more about what you mean by "configurable" ?

For instance you can have the window 'declared'

declare window SensorReading30s
    SensorReading() over window:time(30s) from entry-point DEFAULT
end

and also use this custom window name in the accumulate rule.

Do you mean by "configurable" , known at runtime and varying?

A solution I can think of in that case, a specific rule with the housekeeping style; but I'm quite worried about performance issues may arise.

Just my 2c, hope maybe helps?


On Tue, Jun 10, 2014 at 4:18 AM, moonbeam <jplaberge@magenta.ca> wrote:
How can we make the ‘over window:time’ parameter being configurable?

Something similar to the following rule (that does not compile at all).  See
the $windowTime variable.


declare TemperatureThreshold
        windowTime : String = "30s"
        max : long = 70
end

declare SensorReading
        @role( event )
        temperature : String = "40"
end

rule "Sound the alarm in case temperature rises above threshold"
when
   TemperatureThreshold( $max : max, $windowTime : windowTime )
   Number( doubleValue > $max ) from accumulate(
   SensorReading( $temp : temperature ) over window:time( $windowTime ),
   average( $temp ) )
then
   // sound the alarm
end





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