Ha, thanks a lot Greg. I need new glasses... he is actually comparing
with the parameter "second", but when creating the win fact, using the
parameter "first".
not Win(first == m.second)
insert(new Win(m.first));
Yes, in this case the engine is working exactly as it should.
Anyway, I added the (fixed) test case to the codebase, just in case. :)
Thanks,
Edson
2009/4/16 Greg Barton <greg_barton(a)yahoo.com>
You don't have to worry. The engine is acting as it should.
The rule Paul had was this, a bit simplified for clarity:
rule "direct"
when
m : Move()
not Win(first == m.second)
then
insert(new Win(m.first));
end
If the insertion order is [Move(1,2), Move(2,3)] then the rule matches
first on Move(2,3) and Win(2) is inserted. No other rule fires because now
Move(1,2) and Win(2) match up, removing the instantiation with Move(1,2)
from the agenda.
If the insertion order is [Move(2,3), Move(1,2)] then the order is this:
matched Move(1,2) insert Win(1)
matched Move(2,3) insert Win(2)
The insertion of Win(1) in the first firing does NOT prevent the
instantiation with Move(2,3) from then firing.
So it's all good. :) Sample code and output attached.
--- On Thu, 4/16/09, Greg Barton <greg_barton(a)yahoo.com> wrote:
> From: Greg Barton <greg_barton(a)yahoo.com>
> Subject: Re: [rules-users] Negation semantics in Drools
> To: "Rules Users List" <rules-users(a)lists.jboss.org>
> Date: Thursday, April 16, 2009, 8:50 PM
> It is on the latest snapshot release,
> 5.0.0.20090417.005612-483
>
> --- On Thu, 4/16/09, Edson Tirelli <tirelli(a)post.com>
> wrote:
>
> > We need to investigate if that is still happening
> in
> > latest trunk.
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
>
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JBoss Drools Core Development
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