Hello, "incrementExecutionCount()" threadSafe here or does drools make threadSafe call to external functions? Please someone clarify. Thanks. global SampleDao dao; rule "1" when "some condition on fact" then Rule r = dao.getRule("1"); r.incrementExecutionCount(); end -- View this message in context: http://www.nabble.com/is-threadSafe-required-for-external-func-call--tp20... Sent from the drools - user mailing list archive at Nabble.com.