/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/zmq_driver/server/consumers/zmq_consumer_base.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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | # 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 abc
import logging
import threading
import time
import six
from oslo_messaging._drivers import common as rpc_common
from oslo_messaging._drivers.zmq_driver import zmq_async
from oslo_messaging._drivers.zmq_driver import zmq_names
from oslo_messaging._drivers.zmq_driver import zmq_socket
from oslo_messaging._i18n import _LE
LOG = logging.getLogger(__name__)
zmq = zmq_async.import_zmq()
@six.add_metaclass(abc.ABCMeta)
class ConsumerBase(object):
def __init__(self, conf, poller, server):
self.conf = conf
self.poller = poller
self.server = server
self.sockets = []
self.context = zmq.Context()
@abc.abstractmethod
def listen(self, target):
"""Associate new sockets with targets here"""
@abc.abstractmethod
def receive_message(self, target):
"""Method for poller - receiving message routine"""
def cleanup(self):
for socket in self.sockets:
if not socket.handle.closed:
socket.close()
self.sockets = []
class SingleSocketConsumer(ConsumerBase):
def __init__(self, conf, poller, server, socket_type):
super(SingleSocketConsumer, self).__init__(conf, poller, server)
self.socket = self.subscribe_socket(socket_type)
def subscribe_socket(self, socket_type):
try:
socket = zmq_socket.ZmqRandomPortSocket(
self.conf, self.context, socket_type)
self.sockets.append(socket)
self.poller.register(socket, self.receive_message)
LOG.debug("Run %(stype)s consumer on %(addr)s:%(port)d",
{"stype": zmq_names.socket_type_str(socket_type),
"addr": socket.bind_address,
"port": socket.port})
return socket
except zmq.ZMQError as e:
errmsg = _LE("Failed binding to port %(port)d: %(e)s")\
% (self.port, e)
LOG.error(_LE("Failed binding to port %(port)d: %(e)s"),
(self.port, e))
raise rpc_common.RPCException(errmsg)
@property
def address(self):
return self.socket.bind_address
@property
def port(self):
return self.socket.port
class TargetsManager(object):
def __init__(self, conf, matchmaker, host, socket_type):
self.targets = []
self.conf = conf
self.matchmaker = matchmaker
self.host = host
self.socket_type = socket_type
self.targets_lock = threading.Lock()
self.updater = zmq_async.get_executor(method=self._update_targets) \
if conf.zmq_target_expire > 0 else None
if self.updater:
self.updater.execute()
def _update_targets(self):
with self.targets_lock:
for target in self.targets:
self.matchmaker.register(
target, self.host,
zmq_names.socket_type_str(self.socket_type))
# Update target-records once per half expiration time
time.sleep(self.conf.zmq_target_expire / 2)
def listen(self, target):
with self.targets_lock:
self.targets.append(target)
self.matchmaker.register(
target, self.host,
zmq_names.socket_type_str(self.socket_type))
def cleanup(self):
if self.updater:
self.updater.stop()
for target in self.targets:
self.matchmaker.unregister(
target, self.host,
zmq_names.socket_type_str(self.socket_type))
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