Cfengine3 Messaging

> what would be killer is a combination of the latest cfengine
> (with promise theory) and 0mq.

http://lists.zeromq.org/pipermail/zeromq-dev/2011-February/009491.html

0mq

ZeroMQ comes with 5 basic patterns

• Synchronous Request/Response
• Asynchronous Request/Response
• Publish/Subscribe
• Push/Pull
• Exclusive Pair

Synchronous Request/Response

Client Requests

socket = context.socket(zmq.REQ)
socket.connect("tcp://wbhs-pkg.webhuis.nl:8080")

#  Do 10 requests, waiting each time for a response
print("Sending request %s ..." % request)
socket.send(b"Hello")

#  Get the reply.
message = socket.recv()
print("Received reply %s [ %s ]" % (request, message))

Server Replies

socket = context.socket(zmq.REP)
socket.bind("tcp://10.68.71.184:8080")

#  Wait for next request from client
message = socket.recv()
print("Received request: %s" % message)

#  Send reply back to client
socket.send(b"World")

Publish/Subscribe

socket = context.socket(zmq.PUB)
socket.bind("tcp://10.68.71.184:8080")

#  Wait for next request from client
message = socket.recv()
print("Received request: %s" % message)

#  Send reply back to client
socket.send(b"World")