Yes, It creates the exact same infinite loop that this code does:
rule "MyRule"
when
$p : Person(name = "Yoda")
then
$p.setAge(300);
update($p);
end
As far as I know, the results are the same. The modify() is a more compact
way to do a lot of set() invocations and an update(). Maybe there are also
some other advantages of using modify(), like optimization for example.
Best Regards,
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Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
On Fri, Apr 8, 2011 at 8:39 AM, Geoffrey De Smet <ge0ffrey.s...@gmail.com>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?
>
> --
> With kind regards,
> Geoffrey De Smet
>
>
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