[rules-users] firing rules twice in single session on single object

hi , I am able to fire the rules in drools...But i want to fire the rules after modification of same data ie.., i want to fire the rules twice in the same session for example: i have some stock of different items, if the particular stock item quantity is less than minimum quantity i want fire a rule that order that quantity after that the stock is added to that previous count(stock), i want to recheck the stock positions and again need to fire rules is it possible to fire the rules twice or more in Drools if, please provide me some sample code.... I want to know that Drools can fire a rule multiple times in one session or not???? please let me know if possible and guide me in this scenario thanks in advance