Re: [rules-dev] modify (expr) catch 22

OK, answers my question :)

It is on the "to do" list already. On 8 April 2011 13:11, Mark Proctor <mproctor(a)codehaus.org <mailto:mproctor@codehaus.org>> wrote: On 08/04/2011 12:39, Geoffrey De Smet wrote: > Related to the modify expression, > I 've always wondered about this code: > > rule "MyRule" > when > $p : Person(name = "Yoda") > then > modify ($p) { > setAge(300) > } > end > > Doesn't this create an infinite loop? (In my experience it does or at > least it takes a lot longer) > Because the modify ($p) schedules any rule using a Person back on the > agenda to be re-evaluated, > so also that rule, which is evaluated and executed again, modifying $p > again, ... hence the infinite loop? It would, unless you have slot specific - which Jess does. Slot specific is something I really want to add, I think it will resolve a lot of recursion problems and make Drools a lot easier to use. I took the slot specific problem and genericsed it further for "slot listeners". I discussed this here: http://blog.athico.com/2010/07/slot-specific-and-refraction.html. I think Laune added some refinements to this in a mailing list entry somewhere. Mark _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org <mailto:rules-dev@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-dev _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev