[rules-users] Fire rule only when all the fact objects sent during a specific period match the WHEN part

[Edson Tirelli]

   Ok, your case seems clearly a case where you need either a
StatefulSession or your application needs to send previous readings to
drools.
   If you are using a StatefulSession AND you always use the same SystemInfo
object (just use update on it), you could use "duration" on your rule:

rule "Start_New_Process_If_System_is_70%_Idle_Continuously_for_60_Seconds"
   duration 60000
when
    SystemInfo (idle >= 70)  //Idle continuously for 60 seconds
then
    // start new process
end

   Using StatelessSession, you must have an update rule for your object

rule "System_is_70%_Idle"
    salience 10
when
    $si : SystemInfo (idle >= 70)
then
    $si.setIdleCounter( $si.getIdleCounter() + 1 );
end

rule "Start_New_Process_If_System_is_70%_Idle_Continuously_for_60_Seconds"
when
    SystemInfo( idleCounter >= 12)
then
    // start new process
end

   []s
   Edson

2008/8/19 ganesh.p <ganesh_patkar at hotmail.com>

>
> I need to create a rule with following requirements:
>
> There is a fact class called SystemInfo which contains idle information of
> a
> sytem
>
> public class SystemInfo {
>        private double idle; //System idle percentage
>
>        public void setIdle(double idle) {
>                this.idle = idle;
>        }
>
>        public double getIdle() {
>                return this.idle;
>        }
> }
>
>
> The SystemInfo objects are continuously sent to DROOLS (StatelessSession)
> with 5 second delay.
>
> I need to create a rule
>
>
> rule "Start_New_Process_If_System_is_70%_Idle_Continuously_for_60_Seconds"
>
> when SystemInfo (idle >= 70)  //Idle continuously for 60 seconds
> then
>  // start new process
>
> end
>
>
> I need to fire this rule only if all the 12 SystemInfo objects which are
> sent with 5 seconds delay for 60 seconds, match the condition "idle >= 70".
> Even if a single SystemInfo doesn't match this condition then this rule
> shouldn't be fired.
>
> I am using DROOLS 4.0. Please help me in implementing the WHEN condition.
>
> Thanks
> -Ganesh
> --
> View this message in context:
> http://www.nabble.com/Fire-rule-only-when-all-the-fact-objects-sent-during-a-specific-period-match-the-WHEN-part-tp19029247p19029247.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>



-- 
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20080819/0229c3db/attachment.html