Hahaha - yes - that is what I was thinking. <div><br></div><div>Dyanmic salience was added some time back - but its one of those "did it and forgot about it" things. </div><div>Also - historically salience has been "abused" more than "used" - so perhaps there is less excitement to talk about what you can do with it. </div>
<div><br></div><div>But the case wolfgang mentioned is a good one - if you know you need it you can probably safely use it. </div><div><br><div class="gmail_quote">On Thu, Aug 26, 2010 at 11:21 PM, Edson Tirelli <span dir="ltr"><<a href="mailto:tirelli@post.com">tirelli@post.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div> Wolfgang,</div><div><br></div><div> Not sure I understand what you mean, but Drools supports dynamic salience:</div>
<div class="im"><div><br></div><div>rule "fire in rank order 1,2,..."</div></div><div> salience( -$rank )<br>
when<br> Element( $rank : rank,... )<br></div><div> ...</div><div>then</div><div> ...</div><div>end</div><div><br></div><div> Edson</div><div><br><br><div class="gmail_quote">2010/8/26 Wolfgang Laun <span dir="ltr"><<a href="mailto:wolfgang.laun@gmail.com" target="_blank">wolfgang.laun@gmail.com</a>></span><div>
<div></div><div class="h5"><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Just FYI, but who knows ;-)<br>
<br>
Our proprietary vintage RBS has a feature is (admittedly) rarely used<br>
but could come in handy, every now and then.<br>
<br>
Given this class<br>
<br>
class Element {<br>
int rank; // rank > 0<br>
}<br>
<br>
and to fire a rule in ascending rank order, you can write (using<br>
modified Drools syntax)<br>
<br>
rule "fire in rank order 1,2,..."<br>
when<br>
Element( $rank : rank,... )<br>
// ...<br>
salience -$rank ### <=<br>
then<br>
// ...<br>
end<br>
<br>
The dynamically set salience does all the work. (Of course, you can<br>
achieve the same order<br>
in Drools easily enough.)<br>
<br>
This is possible since salience is a value that must be carried over<br>
into the activation.<br>
There is at least one other rule attribute that shares this property,<br>
but I'm not sure<br>
whether anything useful can be done with dynamic agenda groups.<br>
<br>
Cheers<br>
-W<br>
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</blockquote></div></div></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss by Red Hat @ <a href="http://www.jboss.com" target="_blank">www.jboss.com</a><br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Michael D Neale<br>home: <a href="http://www.michaelneale.net">www.michaelneale.net</a><br>blog: <a href="http://michaelneale.blogspot.com">michaelneale.blogspot.com</a><br>
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