I currently investigate the use of Drools for the OSGi Bundle Resolver algorithm. To that respect I wonder what is the recommended way to count a certain fact. I'd like to fire an action if there is exactly one fact for a given constraint | rule "Use WireCandidate" | when | $import : ImportPackage( exporter == null ) | $wc : WireCandidate( importPackage == $import ) | // TODO: only do this if there is exactly one WireCandidate | then | System.out.println("Use WireCandidate " + $wc.getImportPackage() + " --> " + $wc.getExportPackage()); | modify ( $wc.getImportPackage() ) { setExporter( $wc.getExportPackage() ) }; | retract ( $wc ); | end | | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4264893#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...