I think Gang Liu wrote: > hi, > > thanks for any help in advance! > > I have several questions: > > Q1:multiple threads or users: > > I only create one Rete instance. It is shared by multiple > threads. Are there any potencial issues I want to consider during a > design phase besides using an unique id to keep all fact distinct?
Just the normal Java threading issues regarding any Java code you use outside of Jess. > Q2: scope of variables in rules: > > If we use the same variable names in different rules, does it matter? Those > variables are not global. For example, > (defrule rule1 (xxx ?id) =>) > (defrule rule2 (yyy ?id) =>) > I hope ?id's scope is within that rule. Yes, LHS variable names don't interfere across rules. > > If we use the same variable name in a LHS of a rule, it does matter. For > example, > (defrule test1 (xx ?n) (yy ?n) =>) > > Only if 2 facts exist : (xx ?a), (yy ?b) and ?a equals to ?b, RHS is fired. > > Right? > Yes. --------------------------------------------------------- Ernest Friedman-Hill Distributed Systems Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 Org. 8920, MS 9012 [EMAIL PROTECTED] PO Box 969 http://herzberg.ca.sandia.gov Livermore, CA 94550 -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
