Created
July 21, 2011 14:09
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import zmq | |
import threading | |
import time | |
from random import choice | |
__author__ = "Felipe Cruz <felipecruz@loogica.net>" | |
__license__ = "MIT/X11" | |
class ClientTask(threading.Thread): | |
"""ClientTask""" | |
def __init__(self): | |
threading.Thread.__init__ (self) | |
def run(self): | |
context = zmq.Context() | |
socket = context.socket(zmq.XREQ) | |
identity = 'worker-%d' % (choice([0,1,2,3,4,5,6,7,8,9])) | |
socket.setsockopt(zmq.IDENTITY, identity ) | |
socket.connect('tcp://localhost:5570') | |
print 'Client %s started' % (identity) | |
poll = zmq.Poller() | |
poll.register(socket, zmq.POLLIN) | |
reqs = 0 | |
while True: | |
for i in xrange(5): | |
sockets = dict(poll.poll(1000)) | |
if socket in sockets: | |
if sockets[socket] == zmq.POLLIN: | |
msg = socket.recv() | |
print 'Client %s received: %s\n' % (identity, msg) | |
del msg | |
reqs = reqs + 1 | |
print 'Req #%d sent..' % (reqs) | |
socket.send('request #%d' % (reqs)) | |
socket.close() | |
context.term() | |
class ServerTask(threading.Thread): | |
"""ServerTask""" | |
def __init__(self): | |
threading.Thread.__init__ (self) | |
def run(self): | |
context = zmq.Context() | |
frontend = context.socket(zmq.XREP) | |
frontend.bind('tcp://*:5570') | |
backend = context.socket(zmq.XREQ) | |
backend.bind('inproc://backend') | |
workers = [] | |
for i in xrange(5): | |
worker = ServerWorker(context) | |
worker.start() | |
workers.append(worker) | |
poll = zmq.Poller() | |
poll.register(frontend, zmq.POLLIN) | |
poll.register(backend, zmq.POLLIN) | |
while True: | |
sockets = dict(poll.poll()) | |
if frontend in sockets: | |
if sockets[frontend] == zmq.POLLIN: | |
_id = frontend.recv() | |
msg = frontend.recv() | |
print 'Server received %s id %s\n' % (msg, _id) | |
backend.send(_id, zmq.SNDMORE) | |
backend.send(msg) | |
if backend in sockets: | |
if sockets[backend] == zmq.POLLIN: | |
_id = backend.recv() | |
msg = backend.recv() | |
print 'Sending to frontend %s id %s\n' % (msg, _id) | |
frontend.send(_id, zmq.SNDMORE) | |
frontend.send(msg) | |
frontend.close() | |
backend.close() | |
context.term() | |
class ServerWorker(threading.Thread): | |
"""ServerWorker""" | |
def __init__(self, context): | |
threading.Thread.__init__ (self) | |
self.context = context | |
def run(self): | |
worker = self.context.socket(zmq.XREQ) | |
worker.connect('inproc://backend') | |
print 'Worker started' | |
while True: | |
_id = worker.recv() | |
msg = worker.recv() | |
print 'Worker received %s from %s' % (msg, _id) | |
replies = choice(xrange(5)) | |
for i in xrange(replies): | |
time.sleep(1/choice(range(1,10))) | |
worker.send(_id, zmq.SNDMORE) | |
worker.send(msg) | |
del msg | |
worker.close() | |
def main(): | |
"""main function""" | |
server = ServerTask() | |
server.start() | |
for i in xrange(3): | |
client = ClientTask() | |
client.start() | |
server.join() | |
if __name__ == "__main__": | |
main() |
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