Currently XSUB will not send messages unless they contain a subscribe or
unsubscribe prefix (see code fragment below).
It would be useful to pass these "malformed" messages anyway, although they
would not affect subscription status.
I have not yet looked into the scope of the changes required. At this
stage I am wondering if anyone is against the proposal. If nobody is
against it, I will supply an implementation.
I realize that this is not "purist" pub/sub. It is more like
"point-to-multipoint and multipoint-to-point, with a filter on the former"
which is, at least for me, a useful design pattern.
Thanks,
John
// Malformed subscriptions.
if (size < 1 || (*data != 0 && *data != 1)) {
errno = EINVAL;
return -1;
}
On Sun, Dec 9, 2012 at 1:01 PM, Pieter Hintjens <[email protected]> wrote:
> On Sun, Dec 9, 2012 at 6:24 PM, Stefan Radomski
> <[email protected]> wrote:
>
> > And of what use is ZMQ_XPUB_VERBOSE if I can't know the number of
> subscribers?
>
> In any case you're not guaranteed to receive an ubsubscribe, if
> subscribers disappear without sending those.
>
> -Pieter
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>
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