Re: [rules-users] Monitoring sensor parameter change

rule "first Reading" when    $r: Reading()    not LastReading( this == $r ) then    insert( new LastReading( $r ) ); end ________________________________ From: Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; To: Rules Users List <rules-users(a)lists.jboss.org&gt; Sent: Tuesday, June 11, 2013 12:07 PM Subject: Re: [rules-users] Monitoring sensor parameter change Basically a good approach. declare LastReading   last : Reading end // fire once, to set up LastReading with the very first Reading rule "first Reading" when    $r: Reading()    not LastReading() then    insert( new LastReading( $r ) ); end // based on the existence of a previous reading... rule "next Reading" when   $lr: LastReading( $last: last )   Reading( this == $last, $pp: power ) then end // ...detect and handle an increment beyond the threshold rule "next Reading, big increment" extends "next Reading" when   $new: Reading( $np: power > $pp + 2 ) then   update( $lr ){ setLast( $new ) }   ... code for big increment end // ...detect and handle an increment below the threshold rule "next Reading, small increment" extends "next Reading" when    $new: Reading( this != $last, $np: power <= $pp + 2 ) then   update( $lr ){ setLast( $new ) } end All of this is untested and may contain syntax errors. - The additional constraint (this != $last) in the last rule avoids looping. -W On 11 June 2013 14:46, rjr201 <rich.j.riley(a)gmail.com&gt; wrote: If I understand your question right, you could create a class called _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users