🚀 go-pugleaf

I am working on a Corba client/server application over a slow network.
I would like to avoid that the user click everywhere during long Corba
calls (users are so impatient !) by displaying some kind of modal
message ("Please wait...") during the server treatments.
I've spent several days on that problem !
I've tried to use a JDialog, but it blocks the main thread so it can't
be automatically closed at the end of the treatment.
I've also tried to use the JFrame's GlassPane to discard mouse and
keyboard events, but these events are buffered and triggered when the
treatment is finished.
I don't want to disable/enable all components in my application because
it's a big mess to manage (some fields are disabled before the Corba
call and must not be enabled after).

I guess this is a very common problem in client/server programming so
there *must* be a simple solution.
Any suggestion ???