Java JAX-WS web-service client: how log request & response xml?

I created an implementation of LoggingHandler that implements SOAPHandler<SOAPMessageContext>

It should log whenever handleMessage triggers (and it is never called in my case)

MyService service = new MyService();
MyServicePort port = service.getPortType();

now I try this:

BindingProvider bindingProvider = (BindingProvider)port;
bindingProvider.getBinding().getHandlerChain().add(new LoggingHandler());

I do not see any request / response xml though.

Can you suggest any solution? Maybe there's another way to see output and request XML?