Re: [rules-users] Count matching facts

Try that: rule XYZ when $p : Process( $name : name ) Number( $count : intValue) from accumulate( $i : Process( name == $name, this != $p ), count( $i ) ) then System.out.println( "There are "+$count+" instances of processes named "+$name ); end []s Edson 2008/1/29, cfili <cfilippelli(a)cerner.com&gt;: > > > I am having a hard time finding an example of what I am trying to do, so > maybe someone here could help me. What I am trying to do is determine > how > many facts fall into the same category. > > My facts are 'processes' and one of their attributes is a 'name'. My > goal > is to determine how many processes with the same name are running. The > problem is I do not know ahead of time the process names available, I > want > to determine that set at runtime. Also, once I determine the count for > a > given name, I do not want to run it again for the other processes that > fall > in that name category. > > I think "from collect" is probably what I want to use here, but I am not > sure how to grab the names in my Pattern from the fact I am currently > iterating on. > > Thanks. > -- > View this message in context: > http://www.nabble.com/Count-matching-facts-tp15160392p15160392.html > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli JBoss Drools Core Development Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com