[avahi] Mono apps don't get notified of ClientState.Running
cpinto at yimports.com
Sun Apr 30 20:47:38 PDT 2006
Hi again guys,
the Connect() method doesn't work because the Client.OnClientCallback
method is invoked while avahi_client_new, which means that the Client
object still has an invalid Handle and Avahi.EntryGroup barfs on it.
I'm attaching the patch if you care to take a look (it prints a couple
of debug messages to stdout).
You'll see that the output "OnClientCallback invoked for state Running"
is printed before the "Got handle" message.
Celso Pinto wrote:
> Hi everyone,
> I'm programming an application that uses Avahi's Mono bindings and I
> think I found an ugly problem: when a Mono app creates an instance of
> Avahi.Client, the constructor of this class invokes the native
> avahi_client_new method, which receives a parameter for the client_state
> While still in construction, the Avahi.Client class gets notified that
> the ClientState is now Running, so the Client.OnClientCallback method is
> invoked but the StateChanged event still doesn't contain any Handlers
> because this is all happening during construction of the Avahi.Client
> This means that applications, like my own, that are waiting on the
> StateChanged event with a ClientState.Running value to start publishing
> their services never get notified, therefore never get to publish anything.
> The only way to fix this problem is to create a Client.Connect() method.
> This allows us to first create an instance of Avahi.Client, then add a
> delegate to the StateChanged event and finally call the
> Avahi.Client.Connect() method. Only then our callbacks get notified of
> the running state.
> The big question is: because this will break the current behaviour of
> the Avahi.Client class (meaning that the client connects to the daemon
> during construction), will you guys make the necessary changes?
> avahi mailing list
> avahi at lists.freedesktop.org
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