def ping(self, timeout=1.):
"""Can be used to simply ping the broker to make sure
it's responsive.
Returns the broker PID"""
with self.lock:
send(self.master, 'PING')
while True:
try:
socks = dict(self.poller.poll(timeout * 1000))
break
except zmq.ZMQError as e:
if e.errno != errno.EINTR:
return None
if socks.get(self.master) == zmq.POLLIN:
res = recv(self.master)
try:
res = int(res)
except TypeError:
pass
return res
return None
def _execute(self, job, timeout=None):
if isinstance(job, str):
job = Job(job)
if timeout is None:
timeout = self.timeout_max_overflow
with self.lock:
send(self.master, job.serialize())
while True:
try:
socks = dict(self.poller.poll(timeout))
break
except zmq.ZMQError as e:
if e.errno != errno.EINTR:
raise
if socks.get(self.master) == zmq.POLLIN:
return extract_result(recv(self.master))
raise TimeoutError(timeout / 1000)