Hi

I just try to uses jboss rules in our projects. I met a question. for example

package sample

rule "rule 1"
when 
  $o:Order (amount>100 and amount<200);
 then 
$o.setPrice($o.getPrice()-10);
end

rule "rule 2"
when 
  $o:Order (amount>200);
 then 
$o.setPrice($o.getPrice()-20);
end

if the fact , order's amount is 210. then the rule2 will be executed, then the rule1 will be fired . I want to stop the session once some rule is executed or how to control the rule flow. 
thanks in advance

-Yong