[rules-dev] A dazzling feature - not in Drools!

[Tihomir Surdilovic]

  Added -> https://jira.jboss.org/browse/JBRULES-2677

Thanks.
On 8/26/10 1:15 PM, Mark Proctor wrote:
> On 26/08/2010 17:51, Raphael Duarte Paiva wrote:
>> I totally agree with Wolfgang here.
>>
>> On Thu, Aug 26, 2010 at 11:21, Wolfgang Laun <wolfgang.laun at gmail.com 
>> <mailto:wolfgang.laun at gmail.com>> wrote:
>>
>>     I am surprised, all the more so because (cf. Expert):
>>
>>      "Each rule has a salience attribute that can be assigned an
>>     integer /*number*/,"
>>
>>     This does not event remotely indicate that you can use an
>>     /*expression*/ involving bound variables.
>>
>>     If it isn't documented, nobody will use it. Being in front of the
>>     when part where the bindings occur, it is counter-intuitive to
>>     other bound variable references, and so I didn't even try.
>>
>>     However: good to know, and thanks!
>>
> I'll give write permission to docs to anyone that wants to assist :)
>
> Wolfgang you already have write permissions I believe? :)
>
> I would recommend xmlmind as the authoring tool.
> http://www.xmlmind.com/xmleditor/
>
> Mark
>>
>>
>>     -W
>>
>>
>>
>>     On 26 August 2010 15:21, Edson Tirelli <tirelli at post.com
>>     <mailto:tirelli at post.com>> wrote:
>>     >     Wolfgang,
>>     >     Not sure I understand what you mean, but Drools supports
>>     dynamic
>>     > salience:
>>     > rule "fire in rank order 1,2,..."
>>     >       salience( -$rank )
>>     > when
>>     >       Element( $rank : rank,... )
>>     >       ...
>>     > then
>>     >      ...
>>     > end
>>     >     Edson
>>     >
>>     > 2010/8/26 Wolfgang Laun <wolfgang.laun at gmail.com
>>     <mailto:wolfgang.laun at gmail.com>>
>>     >>
>>     >> Just FYI, but who knows ;-)
>>     >>
>>     >> Our proprietary vintage RBS has a feature is (admittedly)
>>     rarely used
>>     >> but could come in handy, every now and then.
>>     >>
>>     >> Given this class
>>     >>
>>     >>   class Element {
>>     >>       int rank; // rank > 0
>>     >>   }
>>     >>
>>     >> and to fire a rule in ascending rank order, you can write (using
>>     >> modified Drools syntax)
>>     >>
>>     >> rule "fire in rank order 1,2,..."
>>     >> when
>>     >>       Element( $rank : rank,... )
>>     >>       // ...
>>     >> salience -$rank    ### <=
>>     >> then
>>     >>      // ...
>>     >> end
>>     >>
>>     >> The dynamically set salience does all the work. (Of course,
>>     you can
>>     >> achieve the same order
>>     >> in Drools easily enough.)
>>     >>
>>     >> This is possible since salience is a value that must be
>>     carried over
>>     >> into the activation.
>>     >> There is at least one other rule attribute that shares this
>>     property,
>>     >> but I'm not sure
>>     >> whether anything useful can be done with dynamic agenda groups.
>>     >>
>>     >> Cheers
>>     >> -W
>>     >> _______________________________________________
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>>     >> https://lists.jboss.org/mailman/listinfo/rules-dev
>>     >
>>     >
>>     >
>>     > --
>>     >   Edson Tirelli
>>     >   JBoss Drools Core Development
>>     >   JBoss by Red Hat @ www.jboss.com <http://www.jboss.com>
>>     >
>>     > _______________________________________________
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>>     >
>>     >
>>
>>
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>>
>>
>>
>> -- 
>> Abraços
>> Raphael Duarte Paiva
>> Graduando em Ciência da Computação
>>
>> "For millions of years, mankind lived just like the animals. Then 
>> something happened which unleashed the power of our imagination. We 
>> learned to talk [...]" - Stephen Hawking, 1993
>>
>>
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