90 lines
2.5 KiB
Python
90 lines
2.5 KiB
Python
# Copyright 2015 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._drivers.zmq_driver import zmq_poller
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zmq = zmq_async.import_zmq()
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LOG = logging.getLogger(__name__)
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class ThreadingPoller(zmq_poller.ZmqPoller):
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def __init__(self):
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self.poller = zmq.Poller()
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self.recv_methods = {}
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def register(self, socket, recv_method=None):
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if socket in self.recv_methods:
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return
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LOG.debug("Registering socket")
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if recv_method is not None:
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self.recv_methods[socket] = recv_method
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self.poller.register(socket, zmq.POLLIN)
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def unregister(self, socket):
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self.recv_methods.pop(socket, None)
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self.poller.unregister(socket)
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def poll(self, timeout=None):
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if timeout is not None and timeout > 0:
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timeout *= 1000 # convert seconds to milliseconds
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sockets = {}
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try:
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sockets = dict(self.poller.poll(timeout=timeout))
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except zmq.ZMQError as e:
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LOG.debug("Polling terminated with error: %s", e)
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if not sockets:
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return None, None
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for socket in sockets:
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if socket in self.recv_methods:
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return self.recv_methods[socket](socket), socket
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else:
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return socket.recv_multipart(), socket
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def close(self):
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pass # Nothing to do for threading poller
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class ThreadingExecutor(zmq_poller.Executor):
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def __init__(self, method):
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self._method = method
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super(ThreadingExecutor, self).__init__(
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threading.Thread(target=self._loop))
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self._stop = threading.Event()
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def _loop(self):
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while not self._stop.is_set():
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self._method()
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def execute(self):
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self.thread.daemon = True
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self.thread.start()
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def stop(self):
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self._stop.set()
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def wait(self):
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pass
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def done(self):
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self._stop.set()
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