def test_eintr_retry_zmq(itimer, signo, socket, addr):
push = socket(zmq.PUSH)
pull = socket(zmq.PULL)
link_sockets(addr, push, [pull])
interrupted_frames = []
def handler(signo, frame):
interrupted_frames.append(frame)
prev_handler = signal.signal(signo, handler)
prev_itimer = signal.setitimer(itimer, 0.001, 0.001)
for x in itertools.count():
eintr_retry_zmq(push.send, bytes(x))
assert eintr_retry_zmq(pull.recv) == bytes(x)
if len(interrupted_frames) > 100:
break
signal.setitimer(itimer, *prev_itimer)
signal.signal(signo, prev_handler)
def recv(socket, flags=0, capture=(lambda msgs: None)):
"""Receives header, payload, and topics through a ZeroMQ socket.
:param socket: a zmq socket.
:param flags: zmq flags to receive messages.
:param capture: a function to capture received messages.
"""
msgs = eintr_retry_zmq(socket.recv_multipart, flags)
capture(msgs)
return parse(msgs)
def send(socket, header, payload, topics=(), flags=0):
"""Sends header, payload, and topics through a ZeroMQ socket.
:param socket: a zmq socket.
:param header: a list of byte strings which represent a message header.
:param payload: the serialized byte string of a payload.
:param topics: a chain of topics.
:param flags: zmq flags to send messages.
"""
msgs = []
msgs.extend(topics)
msgs.append(SEAM)
msgs.extend(header)
msgs.append(payload)
return eintr_retry_zmq(socket.send_multipart, msgs, flags)
def recv(socket, flags=0, capture=(lambda msgs: None)):
"""Receives header, payload, and topics through a ZeroMQ socket.
:param socket: a zmq socket.
:param flags: zmq flags to receive messages.
:param capture: a function to capture received messages.
"""
msgs = eintr_retry_zmq(socket.recv_multipart, flags)
capture(msgs)
try:
seam = msgs.index(SEAM)
except ValueError:
raise EOFError("no seam after topics")
if seam == len(msgs) - 1:
raise EOFError("neither header nor payload")
topics = msgs[:seam]
header = msgs[seam + 1 : -1]
payload = msgs[-1]
return header, payload, topics