[zeromq-dev] Adding new zmq_getsockopt() to retrieve number of subscriptions from XPUB socket

Bill Torpey wallstprog at gmail.com
Tue Nov 15 22:57:02 CET 2022

The problem with all the socket monitor stuff is that it’s async — that makes it dangerous to act on.  It’s great for monitoring/debugging -- for real-time control not so much.

Arnaud’s PR sounds useful — more visibility can only be a good thing.


> On Nov 15, 2022, at 10:43 AM, Arnaud Loonstra <arnaud at sphaero.org> wrote:
> On 15-11-2022 15:57, Francesco wrote:
>> Hi zeromq team,
>> For "observability" / debugging I think it would be really really
>> useful to be able to retrieve the number of subscriptions recorded by
>> the 'mtrie_t' object inside a (X)PUB socket.
>> Would you accept a PR adding such option?
>> Thanks,
>> Francesco
> Isn't that possible through the socket monitor?
> http://api.zeromq.org/4-1:zmq-socket-monitor
> Rg,
> Arnaud
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