6:19 a.m.
Edison, first of all, thanks for your quick reply!
Those initial words caught my attention, although: “By default, Drools does not start any
internal thread”…
What do you mean “by default”?
I know there are ways to force the event to be expired but I’m looking for a solution that
doesn’t involve to write new rules.
For example, I’m using this kind of solution:
declare A
@role( event )
@expires( 1h )
end
rule "internal - expiring A"
timer(int:1h)
when
$a : A() from entry-point "incoming"
then
retract($a);
end
Although this solution works (from Drools 5.1), I’m forced to write a rule to expire an
event that’s supposed to be expired initially.
There’s a simpler way to do this? I’m thinking correctly?
Once again, thanks!
Vítor Mendonça Moreira
Analista / Programador
Direcção de Investigação e Desenvolvimento
Rua Dr. Francisco Sá Carneiro, nº. 4 r/c esq.
2500 - 206 - Caldas da Rainha
Tel: (+351) 262 832 196
Fax: (+351) 262 186 455
Web: www.makewise.pt<http://www.makewise.pt>
Uma empresa: Grupo Sousa Pedro<http://www.sousapedro.com>
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From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On
Behalf Of Edson Tirelli
Sent: quarta-feira, 16 de Março de 2011 18:38
To: Rules Users List
Subject: Re: [rules-users] Basic doubt regarding Drools Fusion - @expires
By default, Drools does not start any internal thread, so that you can embed it in
non-multithread applications or in JEE containers. That means that the actual release of
events in such cases depends on triggers. In your example, after 1h has passed, whenever
something happens to the session (a new rule is fired, a new event is inserted, the
session clock is advanced, etc), the event will be expired as part of the action. Remember
though that it only happens when running in STREAM mode. In CLOUD mode, event garbage
collection does not make sense and will not happen.
Edson
2011/3/16 Makewise - Vitor Rui Mendonça
<Vitor.Mendonca@brisa.pt<mailto:Vitor.Mendonca@brisa.pt>>
Hi all!
I’ve got a really basic doubt… I’ve read several documentation regarding it but I think I
need some advice here…
Imagine that I have an event:
declare A
@role( event )
@expires( 1h )
end
On my Java code, I call “fireAllRules()” method every time that I put an event into the
working memory.
My doubt: When does event A expires?
a) One hour after it was inserted (time-based and without the “fireAllRules()” method
call) or
b) by calling “fireAllRules()” method (event-based)
T.I.A.
Vítor Mendonça Moreira
Analista / Programador
Direcção de Investigação e Desenvolvimento
Rua Dr. Francisco Sá Carneiro, nº. 4 r/c esq.
2500 - 206 - Caldas da Rainha
Tel: (+351) 262 832 196
Fax: (+351) 262 186 455
Web: www.makewise.pt<http://www.makewise.pt>
Uma empresa: Grupo Sousa Pedro<http://www.sousapedro.com>
[cid:image002.jpg@01CBE493.E9E167A0]
________________________________
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responsável pela sua entrega ao destinatário) e recebeu a mesma por engano, fica
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parte desta mensagem e ficheiros anexos.Por favor reencaminhe a mensagem para o
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The information contained in this message, and any files attached, is privileged and
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Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com<http://www.jboss.com>
