[zeromq-dev] High water mark notification for publisher
edwinamsler at thinkboxsoftware.com
Sat Sep 22 03:22:16 CEST 2012
Completely agree here Justin. It would probably be best to work like
normalish sockets (where there's one sender, one receiver) where if it's
set to blocking, it would block when all queues are full, but if
non-blocking it would return false on send and set errno to EAGAIN when
all queues are full. I definitely agree that when there are no receivers
it should also return false or block, but perhaps use a different errno.
I think this is a common enough use case, and we'd also be backward
compatible. For example, if a user set the socket to non-blocking and
ignored the return value, it would behave exactly as the current
In my case I'm using the epgm protocol here, so there's really no way
for me to know who's listening, but this functionality would work for
both types of PUBs. Either way, I'd like to add this functionality to
ZeroMQ, I just need a mentor to give me a hand with it.
On 21/09/2012 7:26 PM, Justin Karneges wrote:
> In my previous message I suggested that writes to a pub socket should block if
> all subscribers' queues were full.
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