Can we add a SOAP message handler to a deployed webservice

Question

Can we add a SOAP message handler to a deployed webservice, specifically using weblogic server.

i am following a tutorial here: http://www.testearly.com/2008/08/14/creating-soap-message-handlers-in-3-simple-steps-part-1/

but is it possible to attach handler at runtime, without using @HandlerChain(file = "LogMessage_handler.xml") annotation?