Drools - 多个规则触发,即使它们都属于同一个激活组
我有一组规则如下:
rule "Default Margin By Grade"
ruleflow-group "MarginByGrade"
enabled false
when
$mg : MarginByGrade()
$u : PriceUnit( resale==null, trimGrade memberOf $mg.grades )
then
end
rule "Grade Margin By Group, Style" extends "Default Margin By Grade"
activation-group "Margin By Grade"
salience 500
when
MarginByGrade(this == $mg, $u.model memberOf $mg.models, $u.style memberOf $mg.styles)
then
System.out.println("Found match : " + $mg);
end
rule "Grade Margin By Style" extends "Default Margin By Grade"
activation-group "Margin By Grade"
salience 100
when
MarginByGrade(this == $mg, models == null, $u.style memberOf $mg.styles)
then
System.out.println("Found match : " + $mg);
end
rule "Grade Margin By Group" extends "Default Margin By Grade"
activation-group "Margin By Grade"
salience 50
when
MarginByGrade(this == $mg, prefixes memberOf prefixes, styles == null)
then
System.out.println("Found match : " + $mg);
end
rule "Margin by Grade" extends "Default Margin By Grade"
salience 5
activation-group "Margin By Grade"
when
MarginByGrade(this == $mg, prefixes == null, styles == null)
then
System.out.println("Found match : " + $mg);
end
规则是基于规则流触发的(因此是“ruleflow-group”属性)。我的要求是,一旦具有最高显着性的规则触发,具有较低显着性的规则不应触发然而,当我运行提供激活多个规则的事实时,所有激活的规则都会被解雇:
Start Process: Mon Sep 19 15:58:39 EDT 2011
Found match : MarginByGrade( prefixes=null, styles=null, grades=[C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S], margin=26.0000 )
Found match : MarginByGrade( prefixes=[015, 215], styles=[572], grades=[A, B, D], margin=25.5000 )
Found match : MarginByGrade( prefixes=[015, 010], styles=[515, 215, 572], grades=[C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S], margin=24.5000 )
015572 D 015572 D933079 FN 175->null
Dispose Session: Mon Sep 19 15:58:39 EDT 2011
我使用 Drools Expert 5.2.0-Final 做错了什么?
I have a set of rules as follows:
rule "Default Margin By Grade"
ruleflow-group "MarginByGrade"
enabled false
when
$mg : MarginByGrade()
$u : PriceUnit( resale==null, trimGrade memberOf $mg.grades )
then
end
rule "Grade Margin By Group, Style" extends "Default Margin By Grade"
activation-group "Margin By Grade"
salience 500
when
MarginByGrade(this == $mg, $u.model memberOf $mg.models, $u.style memberOf $mg.styles)
then
System.out.println("Found match : " + $mg);
end
rule "Grade Margin By Style" extends "Default Margin By Grade"
activation-group "Margin By Grade"
salience 100
when
MarginByGrade(this == $mg, models == null, $u.style memberOf $mg.styles)
then
System.out.println("Found match : " + $mg);
end
rule "Grade Margin By Group" extends "Default Margin By Grade"
activation-group "Margin By Grade"
salience 50
when
MarginByGrade(this == $mg, prefixes memberOf prefixes, styles == null)
then
System.out.println("Found match : " + $mg);
end
rule "Margin by Grade" extends "Default Margin By Grade"
salience 5
activation-group "Margin By Grade"
when
MarginByGrade(this == $mg, prefixes == null, styles == null)
then
System.out.println("Found match : " + $mg);
end
The rules are triggered based on a Rule Flow (hence the 'ruleflow-group' attribute. My requirement is that once the rule with the highest salience fires, the rules with the lower salience should not fire. Yet when I run provide a fact that activates multiple rules, all activated rules get fired:
Start Process: Mon Sep 19 15:58:39 EDT 2011
Found match : MarginByGrade( prefixes=null, styles=null, grades=[C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S], margin=26.0000 )
Found match : MarginByGrade( prefixes=[015, 215], styles=[572], grades=[A, B, D], margin=25.5000 )
Found match : MarginByGrade( prefixes=[015, 010], styles=[515, 215, 572], grades=[C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S], margin=24.5000 )
015572 D 015572 D933079 FN 175->null
Dispose Session: Mon Sep 19 15:58:39 EDT 2011
What am I doing wrong? I'm using Drools Expert 5.2.0-Final.
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评论(3)
那么您使用的是激活组而不是规则流组,对吧?激活组将导致仅执行一条规则,正如您提到的,如果激活的话,将执行具有更高显着性的规则。
干杯
Well you are using activation-group and not ruleflow-group right?.. The activation-group will cause that only one rule get executed and as you mention the one with higher salience will be executed if it is activated.
Cheers
无状态会话:
如果您正在使用事实集合和无状态会话,请注意激活组,因为只有一个规则会触发,它会跳过其他事实。
最好的解决方案是在事实上使用显着性和已处理的标志
Stateless Session:
Be-aware of activation-group in case you are working with collection of Facts and stateless session, since only one rule will fire, it would skip other facts.
Best solution is to use Salience and a processed flag on facts
激活组将为单个
MarginByGrade
触发一次从控制台输出来看,您至少有 3 个
MarginByGrade
,因此为这 3 个中的每一个触发不同的规则是正确的>按等级保证金
The activation group will fire once for a single
MarginByGrade
From your console output, you have at least 3
MarginByGrade
, so it's correct to fire different rules for each of these 3MarginByGrade