/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/zmq_driver/proxy/central/zmq_central_proxy.py is in python-oslo.messaging 5.35.0-0ubuntu1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | # Copyright 2015-2016 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 logging
from oslo_messaging._drivers.zmq_driver.proxy.central \
import zmq_publisher_proxy
from oslo_messaging._drivers.zmq_driver.proxy \
import zmq_base_proxy
from oslo_messaging._drivers.zmq_driver.proxy import zmq_sender
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_updater
from oslo_messaging._i18n import _LI
LOG = logging.getLogger(__name__)
zmq = zmq_async.import_zmq()
class SingleRouterProxy(zmq_base_proxy.ProxyBase):
PROXY_TYPE = "ROUTER"
def __init__(self, conf, context, matchmaker):
super(SingleRouterProxy, self).__init__(conf, context, matchmaker)
port = conf.zmq_proxy_opts.frontend_port
self.fe_router_socket = zmq_base_proxy.create_socket(
conf, context, port, zmq.ROUTER)
self.poller.register(self.fe_router_socket, self._receive_message)
self.publisher = zmq_publisher_proxy.PublisherProxy(conf, matchmaker)
self.router_sender = zmq_sender.CentralRouterSender()
self.ack_sender = zmq_sender.CentralAckSender()
self._router_updater = self._create_router_updater()
def run(self):
message, socket = self.poller.poll()
if message is None:
return
message_type = int(message[zmq_names.MESSAGE_TYPE_IDX])
if self.conf.oslo_messaging_zmq.use_pub_sub and \
message_type in zmq_names.MULTISEND_TYPES:
self.publisher.send_request(message)
if socket is self.fe_router_socket and \
self.conf.zmq_proxy_opts.ack_pub_sub:
self.ack_sender.send_message(socket, message)
else:
self.router_sender.send_message(
self._get_socket_to_dispatch_on(socket), message)
def _create_router_updater(self):
return RouterUpdater(
self.conf, self.matchmaker, self.publisher.host,
self.fe_router_socket.connect_address,
self.fe_router_socket.connect_address)
def _get_socket_to_dispatch_on(self, socket):
return self.fe_router_socket
def cleanup(self):
super(SingleRouterProxy, self).cleanup()
self._router_updater.cleanup()
self.fe_router_socket.close()
self.publisher.cleanup()
class DoubleRouterProxy(SingleRouterProxy):
PROXY_TYPE = "ROUTER-ROUTER"
def __init__(self, conf, context, matchmaker):
port = conf.zmq_proxy_opts.backend_port
self.be_router_socket = zmq_base_proxy.create_socket(
conf, context, port, zmq.ROUTER)
super(DoubleRouterProxy, self).__init__(conf, context, matchmaker)
self.poller.register(self.be_router_socket, self._receive_message)
def _create_router_updater(self):
return RouterUpdater(
self.conf, self.matchmaker, self.publisher.host,
self.fe_router_socket.connect_address,
self.be_router_socket.connect_address)
def _get_socket_to_dispatch_on(self, socket):
return self.be_router_socket \
if socket is self.fe_router_socket \
else self.fe_router_socket
def cleanup(self):
super(DoubleRouterProxy, self).cleanup()
self.be_router_socket.close()
class RouterUpdater(zmq_updater.UpdaterBase):
"""This entity performs periodic async updates
from router proxy to the matchmaker.
"""
def __init__(self, conf, matchmaker, publisher_address, fe_router_address,
be_router_address):
self.publisher_address = publisher_address
self.fe_router_address = fe_router_address
self.be_router_address = be_router_address
super(RouterUpdater, self).__init__(
conf, matchmaker, self._update_records,
conf.oslo_messaging_zmq.zmq_target_update)
def _update_records(self):
self.matchmaker.register_publisher(
(self.publisher_address, self.fe_router_address),
expire=self.conf.oslo_messaging_zmq.zmq_target_expire)
LOG.info(_LI("[PUB:%(pub)s, ROUTER:%(router)s] Update PUB publisher"),
{"pub": self.publisher_address,
"router": self.fe_router_address})
self.matchmaker.register_router(
self.be_router_address,
expire=self.conf.oslo_messaging_zmq.zmq_target_expire)
LOG.info(_LI("[Backend ROUTER:%(router)s] Update ROUTER"),
{"router": self.be_router_address})
def cleanup(self):
super(RouterUpdater, self).cleanup()
self.matchmaker.unregister_publisher(
(self.publisher_address, self.fe_router_address))
self.matchmaker.unregister_router(
self.be_router_address)
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