The Rules is very simple as if the name of the customer is "Ashish' then set the phone to some value as given in the rule . public static void main(String[] args) { Properties properties = new Properties(); try { properties.load(new FileInputStream("C:\\Dev\\MyTest\\src\\com\\mytest\\MyRules.properties")); } catch (IOException e) { } RuleAgent ruleAgent = RuleAgent.newRuleAgent(properties); RuleBase rb = ruleAgent.getRuleBase(); StatefulSession session = rb.newStatefulSession(); session.addEventListener( new DebugAgendaEventListener() ); session.addEventListener( new DebugWorkingMemoryEventListener() ); WorkingMemoryFileLogger logger = new WorkingMemoryFileLogger( session ); Customer customer = new Customer(); customer.setName("Ashish"); logger.setFileName( "C:\\Dev\\MyTest\\src\\com\\mytest\\helloworld.txt" ); session.insert(customer); session.fireAllRules(); logger.writeToDisk(); session.dispose(); Properties File newInstance=true url= http://localhost:8080/drools-jbrms/org.drools.brms.JBRMS/package/AshwinPK... poll=30 name=MyConfig Regards, Ashish soni