/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/zmq_driver/poller/green_poller.py is in python-oslo.messaging 4.6.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | # Copyright 2015 Mirantis, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import threading
import eventlet
from oslo_messaging._drivers.zmq_driver import zmq_poller
class GreenPoller(zmq_poller.ZmqPoller):
def __init__(self):
self.incoming_queue = eventlet.queue.LightQueue()
self.green_pool = eventlet.GreenPool()
self.thread_by_socket = {}
def register(self, socket, recv_method=None):
if socket not in self.thread_by_socket:
self.thread_by_socket[socket] = self.green_pool.spawn(
self._socket_receive, socket, recv_method)
def _socket_receive(self, socket, recv_method=None):
while True:
if recv_method:
incoming = recv_method(socket)
else:
incoming = socket.recv_multipart()
self.incoming_queue.put((incoming, socket))
eventlet.sleep()
def poll(self, timeout=None):
try:
return self.incoming_queue.get(timeout=timeout)
except eventlet.queue.Empty:
return (None, None)
def close(self):
for thread in self.thread_by_socket.values():
thread.kill()
self.thread_by_socket = {}
class HoldReplyPoller(GreenPoller):
def __init__(self):
super(HoldReplyPoller, self).__init__()
self.event_by_socket = {}
self._is_running = threading.Event()
def register(self, socket, recv_method=None):
super(HoldReplyPoller, self).register(socket, recv_method)
self.event_by_socket[socket] = threading.Event()
def resume_polling(self, socket):
pause = self.event_by_socket[socket]
pause.set()
def _socket_receive(self, socket, recv_method=None):
pause = self.event_by_socket[socket]
while not self._is_running.is_set():
pause.clear()
if recv_method:
incoming = recv_method(socket)
else:
incoming = socket.recv_multipart()
self.incoming_queue.put((incoming, socket))
pause.wait()
def close(self):
self._is_running.set()
for pause in self.event_by_socket.values():
pause.set()
eventlet.sleep()
super(HoldReplyPoller, self).close()
class GreenExecutor(zmq_poller.Executor):
def __init__(self, method):
self._method = method
super(GreenExecutor, self).__init__(None)
self._done = threading.Event()
def _loop(self):
while not self._done.is_set():
self._method()
eventlet.sleep()
def execute(self):
self.thread = eventlet.spawn(self._loop)
def wait(self):
if self.thread is not None:
self.thread.wait()
def stop(self):
if self.thread is not None:
self.thread.kill()
def done(self):
self._done.set()
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