A timer should accomplish this. If the event disappears for some other reason, this activation is cancelled, too.

rule kill
timer( 20s )
when
    $e:Event(connectionEventType == ConnectionEventType.CLOSE)
then
   retract( $e );
end

-W


On 3 October 2012 19:59, gboro54 <gboro54@gmail.com> wrote:
Based on testing expiring an event does no remove it from working memory.
What is the best way to manage working memory in the case that after a
period of X seconds you want the event removed? Would you simply write a
rule that would do a retract after a certain window i.e


rule "Closed Connection Occured"
        when
                $e:Event(connectionEventType == ConnectionEventType.CLOSE this after [20s]
this)
        then
                retract($e);
end



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