144 lines
5.3 KiB
Python
144 lines
5.3 KiB
Python
# Copyright 2015-2016 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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from oslo_messaging._drivers.zmq_driver.proxy.central \
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import zmq_publisher_proxy
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from oslo_messaging._drivers.zmq_driver.proxy \
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import zmq_base_proxy
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from oslo_messaging._drivers.zmq_driver.proxy import zmq_sender
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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_names
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from oslo_messaging._drivers.zmq_driver import zmq_updater
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from oslo_messaging._i18n import _LI
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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class SingleRouterProxy(zmq_base_proxy.ProxyBase):
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PROXY_TYPE = "ROUTER"
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def __init__(self, conf, context, matchmaker):
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super(SingleRouterProxy, self).__init__(conf, context, matchmaker)
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port = conf.zmq_proxy_opts.frontend_port
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self.fe_router_socket = zmq_base_proxy.create_socket(
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conf, context, port, zmq.ROUTER)
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self.poller.register(self.fe_router_socket, self._receive_message)
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self.publisher = zmq_publisher_proxy.PublisherProxy(conf, matchmaker)
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self.router_sender = zmq_sender.CentralRouterSender()
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self.ack_sender = zmq_sender.CentralAckSender()
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self._router_updater = self._create_router_updater()
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def run(self):
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message, socket = self.poller.poll()
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if message is None:
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return
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message_type = int(message[zmq_names.MESSAGE_TYPE_IDX])
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if self.conf.oslo_messaging_zmq.use_pub_sub and \
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message_type in zmq_names.MULTISEND_TYPES:
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self.publisher.send_request(message)
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if socket is self.fe_router_socket and \
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self.conf.zmq_proxy_opts.ack_pub_sub:
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self.ack_sender.send_message(socket, message)
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else:
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self.router_sender.send_message(
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self._get_socket_to_dispatch_on(socket), message)
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def _create_router_updater(self):
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return RouterUpdater(
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self.conf, self.matchmaker, self.publisher.host,
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self.fe_router_socket.connect_address,
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self.fe_router_socket.connect_address)
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def _get_socket_to_dispatch_on(self, socket):
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return self.fe_router_socket
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def cleanup(self):
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super(SingleRouterProxy, self).cleanup()
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self._router_updater.cleanup()
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self.fe_router_socket.close()
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self.publisher.cleanup()
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class DoubleRouterProxy(SingleRouterProxy):
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PROXY_TYPE = "ROUTER-ROUTER"
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def __init__(self, conf, context, matchmaker):
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port = conf.zmq_proxy_opts.backend_port
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self.be_router_socket = zmq_base_proxy.create_socket(
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conf, context, port, zmq.ROUTER)
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super(DoubleRouterProxy, self).__init__(conf, context, matchmaker)
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self.poller.register(self.be_router_socket, self._receive_message)
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def _create_router_updater(self):
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return RouterUpdater(
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self.conf, self.matchmaker, self.publisher.host,
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self.fe_router_socket.connect_address,
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self.be_router_socket.connect_address)
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def _get_socket_to_dispatch_on(self, socket):
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return self.be_router_socket \
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if socket is self.fe_router_socket \
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else self.fe_router_socket
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def cleanup(self):
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super(DoubleRouterProxy, self).cleanup()
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self.be_router_socket.close()
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class RouterUpdater(zmq_updater.UpdaterBase):
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"""This entity performs periodic async updates
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from router proxy to the matchmaker.
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"""
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def __init__(self, conf, matchmaker, publisher_address, fe_router_address,
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be_router_address):
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self.publisher_address = publisher_address
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self.fe_router_address = fe_router_address
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self.be_router_address = be_router_address
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super(RouterUpdater, self).__init__(
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conf, matchmaker, self._update_records,
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conf.oslo_messaging_zmq.zmq_target_update)
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def _update_records(self):
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self.matchmaker.register_publisher(
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(self.publisher_address, self.fe_router_address),
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expire=self.conf.oslo_messaging_zmq.zmq_target_expire)
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LOG.info(_LI("[PUB:%(pub)s, ROUTER:%(router)s] Update PUB publisher"),
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{"pub": self.publisher_address,
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"router": self.fe_router_address})
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self.matchmaker.register_router(
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self.be_router_address,
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expire=self.conf.oslo_messaging_zmq.zmq_target_expire)
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LOG.info(_LI("[Backend ROUTER:%(router)s] Update ROUTER"),
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{"router": self.be_router_address})
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def cleanup(self):
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super(RouterUpdater, self).cleanup()
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self.matchmaker.unregister_publisher(
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(self.publisher_address, self.fe_router_address))
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self.matchmaker.unregister_router(
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self.be_router_address)
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