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52 lines
1.3 KiB
Python
52 lines
1.3 KiB
Python
"""pure Python monitored_queue function
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For use when Cython extension is unavailable (PyPy).
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Authors
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-------
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* MinRK
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"""
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# Copyright (C) PyZMQ Developers
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# Distributed under the terms of the Modified BSD License.
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from typing import Callable
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import zmq
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from zmq.backend import monitored_queue as _backend_mq
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def _relay(ins, outs, sides, prefix, swap_ids):
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msg = ins.recv_multipart()
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if swap_ids:
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msg[:2] = msg[:2][::-1]
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outs.send_multipart(msg)
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sides.send_multipart([prefix] + msg)
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def _monitored_queue(
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in_socket, out_socket, mon_socket, in_prefix=b'in', out_prefix=b'out'
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):
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swap_ids = in_socket.type == zmq.ROUTER and out_socket.type == zmq.ROUTER
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poller = zmq.Poller()
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poller.register(in_socket, zmq.POLLIN)
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poller.register(out_socket, zmq.POLLIN)
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while True:
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events = dict(poller.poll())
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if in_socket in events:
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_relay(in_socket, out_socket, mon_socket, in_prefix, swap_ids)
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if out_socket in events:
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_relay(out_socket, in_socket, mon_socket, out_prefix, swap_ids)
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monitored_queue: Callable
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if _backend_mq is not None:
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monitored_queue = _backend_mq # type: ignore
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else:
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# backend has no monitored_queue
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monitored_queue = _monitored_queue
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__all__ = ['monitored_queue']
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