[zeromq-dev] PUB/SUB with multiple publishers

Dmitri Toubelis dmitri.toubelis at alkeron.com
Sat Jul 17 03:05:24 CEST 2010

I've abandoned this idea for now, it seems easier to implement my own
broker, then try to make ZMQ to what it is not designed to do. It would be
nice to see this feature in a future releases though. It is not a classical
PUB/SUB pattern but I think it is way more powerful. Can I suggest it as a
feature request? It should be rather straightforward fix.

-----Original Message-----
From: zeromq-dev-bounces at lists.zeromq.org
[mailto:zeromq-dev-bounces at lists.zeromq.org] On Behalf Of david starkweather
Sent: July 16, 2010 8:42 PM
To: 0MQ development list
Subject: Re: [zeromq-dev] PUB/SUB with multiple publishers

I recently tried something similar.  My aim was to have a main publisher
socket in the main thread, and then each worker thread have a another
publisher socket.  I would then have a pipe between the worker sockets
and a sub socket in the main thread.  It is my understanding that the
forwarder device is supposed to work for this scenario - i.e. forward
from the sub skt to the main pub skt.  I recieved no errors, but none of
the messages got delivered to the other sub skts that subscribed.

I managed to implement my own queue in which I forward all messages, and
then have one publisher thread to just publish messages.  I have only
been able to get the pub/sub mechanism to work when there is just one
publisher.  If anyone has any alternate ideas, I'd be interested.

Grant Starkweather

On Fri, 2010-07-16 at 13:34 -0400, Dmitri Toubelis wrote:
> I have a scenario when I need to use PUB/SUB scheme with multiple
> publishers. Is it possible to do with "inproc" transport? 
> Here is what I tried:
> - create PUB socket and bind it to "inproc://pipe" endpoint
> - create another PUB socket and connect it to the same "inproc://pipe"
> endpoint
> - create SUB socket for each subscriber and connect them to thre
> "inproc://pipe" endpoint.
> - publish message using second publisher.
> I'm getting no error, but message is not getting delivered to
> subscribers. Am I doing something wrong?
> Any help is appreciated.
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> zeromq-dev mailing list
> zeromq-dev at lists.zeromq.org
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