CODEWITHSUNDEEP
c++multithreadingzeromq
Alex
Alex

Reputation: 2541

ZeroMQ How can server mantain connections with all clients?

I have the following task:

Clients connect to a server on 1 port (e.g. 8080). The server should remember them and after completing calculation it should send results to the clients. After that server gets some results again and again sends it to all clients. And so on.

How can server mantain connections with all clients?

Upvotes: 0

Views: 825

Answers (2)

Alex
Alex

Reputation: 2541

I've found some code uses PUB\SUB model and works with NAT here http://grokbase.com/t/zeromq/zeromq-dev/112q9934vg/nat-firewall-pub-sub-traversal:

Publisher that connects, rather than binds:

import zmq
ctxt = zmq.Context()
pub = ctxt.socket(zmq.PUB)
pub.connect("tcp://127.0.0.1:2000")
while 1:
pub.send(os.urandom(5))

Subscriber that binds, rather than connects:

import zmq
ctxt = zmq.Context()
sub = ctxt.socket(zmq.SUB)
sub.bind("tcp://127.0.0.1:2000")
while 1:
sub.rcv()

Upvotes: 0

Oleksii Kachaiev
Oleksii Kachaiev

Reputation: 6232

Do you actually need to maintain all connections from clients? I think, that "publish/subscribe" messaging model will satisfy described conditions. The server should "publish" results and clients should "subscribe" on this updates. Simplest example for such "server" you can find in zguide code samples: wuserver.cpp

Upvotes: 1

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