Chained Rules
by djb
Hi all,
I know there are some basic ways to chain rules together, by setting flags
in consequences that are checked in the conditions of other rules...
but in a large system based on rule templates, where thousands of rules are
generated, it is not feasible to chain rules in this manner, especially when
they are chained in a somewhat arbitrary fashion
(eg. True if Rule 130 AND Rule 200 AND Rule 480 fire)
has anyone had this situation before? would I need to execute this as a
post-processing step? or, is there any design pattern that will allow rules
to be chained, preferably in a manageable way?
regards,
Daniel
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15 years, 5 months
I'd like to get Drools 5.0
by 多田丈晃
Hi,
Does anyone know where I can get older version Drools archive?
On my work, I need to use Drools 5.0.
but In Drools download page only have latest version.
Please let me know where is older version archive download page.
15 years, 6 months
Re: [rules-users] Incorrect allowable comparison when using Guvnor GUI Rules - known bug?
by Alex.Porras＠dds.net
Stephen Mcgruer <s0840449 <at> sms.ed.ac.uk> wrote:
> Now, I want to match on the fooBar's barInt property being less than a
hundred. So, I click on fooBar,
> and choose the 'barInt' subfield. It appears, *BUT* there is no option
for "is greater than" or "is
> less than", only "is equals to" and "is not equals to"!
I recently downloaded drools 5.1.1 and am experiencing the same issue.
Anyone else?
Cheers,
Alex
15 years, 6 months
Re: [rules-users] RuleFlowProcessFactory - no XML output?
by Jeff Parks
I should have mentioned that I am using Drools 5.1.1
From: Jeff Parks [mailto:jeff.parks@comcast.net]
Sent: Tuesday, August 31, 2010 4:33 PM
To: 'rules-users(a)lists.jboss.org'
Subject: RuleFlowProcessFactory - no XML output?
I like the idea of creating a Drools Process via the Process API. It fits my
usage model very well . What surprises me is that I have not seen a way to
take the RuleFlowProcess and create a Process in XML format, which I would
think to be a natural extension. I have to think I am missing something -
can someone share me some code snippet that accomplishes my goal?
thanks
15 years, 6 months
Multiple StatefulKnowledgeSessions at a time?
by skasab2s
Hello,
(I'm sorry if this question already has been asked.) My company uses Drools
for answering questions. For every asked question, a new
StateFulknowledgeSession is created and after the question has been answerd
by Drools, the StateFulknowledgeSession is being disposed. Now we have the
situation that multiple questions can be asked at the same point of time.
That's why we have to decide if we should have only one
StatefulKnowledgeSession at a time (i.e execute the questions sequentially)
or allow parallelism (i.e. have many instances of StateFulknowledgeSession
at one time). Which from the both alternatives would you propose to use? On
what could depend our decision?
Many thanks and best regards,
Svetlomir Kasabov.
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15 years, 6 months
Getting rule's body to application.
by tom ska
Hello,
what I want to do, is to get rule's body(rule's code written in DRL). For
example: I have a ConsequenceException, and I can get rule's name, and
package this way:
.
.
.
catch (ConsequenceException e) {
e.getRule().getName();
e.getRule().getPackageName();
}
But for me it is not enough. I want to see rule's code. haw can I get it?
Thanks,
tom.
15 years, 6 months
How can I know, how many facts are processed by stateFulSession?
by tom ska
Hello,
I have a class and rule:
class CTestObj
{
private double value;
void setValue(double v) {
this.value = v;
}
double getValue() {
return this.value;
}
}
rule "r1"
when
p : CTestObj
then
p.setValue( 1 / p.getValue() );
end
As you can see, in this rule, there is risk, to put into stateFulSession
object with value set 0. I can't validate this, because, this problem has a
variation where I put into stateFulSession object with set no 0, but the
rule will modify it...
So - I can't validate this = fact with value 0 is correct.
But I process with stateFulSession many, many facts... For example 1000.
And, after 900 facts it occurs, that fact number 901 has value set on 0. In
effect I get an exception: org.drools.runtime.rule.ConsequenceException:
java.lang.ArithmeticException: / by zero. And ksession stops processing
facts. But, 900 facts are processed! I don't want to process them second
time.
And this is my question:
How can I know, which fact is first no-processed fact? Which one stoped
fireAllRules method?
Beacuse I don't want to process them another time.
Greetings :)
tom.
15 years, 6 months
RuleFlowProcessFactory - no XML output?
by Jeff Parks
I like the idea of creating a Drools Process via the Process API. It fits my
usage model very well . What surprises me is that I have not seen a way to
take the RuleFlowProcess and create a Process in XML format, which I would
think to be a natural extension. I have to think I am missing something -
can someone share me some code snippet that accomplishes my goal?
thanks
15 years, 6 months
