Hi, You have different way to do this, example: you add a new class public class DroolsLogger { public static KnowledgeRuntimeLogger fileLogger =null; public static void verifyLogger (StatefulKnowledgeSession ksession){ if(fileLogger==null) fileLogger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "drools/logs"); } public static void closeLogger(){ if(fileLogger!=null) fileLogger.close(); } } In your main class: DroolsLogger.verifyLogger(session) session.fireAllRules(); DroolsLogger.closeLogger(); I hope I was clear Regards -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Append-the-Logs-For-t... Sent from the Drools - Dev mailing list archive at Nabble.com.