[rules-users] How to create logfile when using ruleAgent and statefulSession

Hi, Can anyone give me a code example how to create a logfile when using a rule agent (rulebase) and statefulsession? The goals is to replace all system.out.println(); statements in de rules with Log(); (the rules are made with the Guvnor GUI, and I am using Guvnor 5.1 with a oc4j server) The text that is in de Log() should then appear in an existing logfile. Thanx in advance.