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

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! -W On 26 August 2010 15:21, Edson Tirelli <tirelli(a)post.com&gt; 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(a)gmail.com&gt; >> >> 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 >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev > > > > -- > Edson Tirelli > JBoss Drools Core Development > JBoss by Red Hat @ www.jboss.com > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev