Being interested in NameOwnerChanged for a namespace, not one name

[Marcel Holtmann]

Hi Will,

> Mission Control, a Telepathy component, watches for new Telepathy 
> Connection Managers appearing by binding to NameOwnerChanged and looking 
> for names starting with "org.freedesktop.Telepathy.ConnectionManager.".
> 
> So obviously this is a bad idea. ryan lortie rightly called me out for 
> this at GuadeKademy last summer, and I started implementing support for 
> argXprefix in match rules: 
> <http://git.collabora.co.uk/?p=user/wjt/dbus.git;a=commitdiff;h=refs/heads/argx-prefix-matching>. 
> I haven't worked on it since then, but have just been reminded of it.
> 
> Any opinions on whether:
> 
> • this is a good general approach to solving this problem;
> • this is a good specific approach to solving this problem;
> • support for this should be negotiated at connection time, or inferred 
> by the error reply from AddMatch, or included in a list of features 
> pushed to the client by the bus just after connection (as suggested by 
> Alban on IRC), or...?

what is wrong with just adding glob style pattern matching to the arg0
argument? Or to AddMatch arguments in general. It seems a bit more
straight forward to me. Just doing prefix matching also seems a bit
short sighted to me. What is if some application requires suffix
matching or wants some specific middle part?

Regards

Marcel