sample.drl

package org.jboss.ddoyle.drools.rules

import org.jboss.ddoyle.drools.model.SimpleEvent
import org.jboss.ddoyle.drools.model.NoExpirationSimpleEvent

declare SimpleEvent
    @role( event )
    @timestamp( timestamp )
    @expires( 10s )
end

declare NoExpirationSimpleEvent
	@role (event)
	@timestamp ( timestamp )
	@expires ( 100d )
end


rule "rule_1"
    when
       $s: SimpleEvent ()
       not SimpleEvent (this != $s, this after[0, 30s] $s)
    then
       System.out.println("No event within 30 seconds of this event: " + $s.getId());
end