69 lines
2.2 KiB
Python
69 lines
2.2 KiB
Python
# Copyright 2016 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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import threading
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from oslo_messaging._drivers.zmq_driver import zmq_async
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from oslo_messaging._i18n import _LW
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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class ReplyWaiter(object):
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def __init__(self, conf):
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self.conf = conf
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self.replies = {}
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self.poller = zmq_async.get_poller()
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self.executor = zmq_async.get_executor(self.run_loop)
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self.executor.execute()
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self._lock = threading.Lock()
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def track_reply(self, reply_future, message_id):
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with self._lock:
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self.replies[message_id] = reply_future
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def untrack_id(self, message_id):
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with self._lock:
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self.replies.pop(message_id)
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def poll_socket(self, socket):
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self.poller.register(socket, recv_method=self.receive_method)
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def receive_method(self, socket):
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empty = socket.recv()
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assert empty == b'', "Empty expected!"
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envelope = socket.recv_pyobj()
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assert envelope is not None, "Invalid envelope!"
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reply = socket.recv_pyobj()
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LOG.debug("Received reply %s", envelope)
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return reply
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def run_loop(self):
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reply, socket = self.poller.poll(
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timeout=self.conf.rpc_poll_timeout)
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if reply is not None:
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call_future = self.replies.get(reply.message_id)
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if call_future:
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call_future.set_result(reply)
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else:
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LOG.warning(_LW("Received timed out reply: %s"),
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reply.message_id)
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def cleanup(self):
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self.poller.close()
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