100 lines
4.1 KiB
Python
100 lines
4.1 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 uuid
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import six
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from oslo_messaging._drivers.zmq_driver.client.publishers.dealer \
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import zmq_dealer_publisher_base
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from oslo_messaging._drivers.zmq_driver.client import zmq_receivers
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from oslo_messaging._drivers.zmq_driver.client import zmq_routing_table
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from oslo_messaging._drivers.zmq_driver.client import zmq_senders
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from oslo_messaging._drivers.zmq_driver import zmq_address
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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 _LW
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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class DealerPublisherProxy(zmq_dealer_publisher_base.DealerPublisherBase):
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"""DEALER-publisher via proxy."""
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def __init__(self, conf, matchmaker):
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sender = zmq_senders.RequestSenderProxy(conf)
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if conf.oslo_messaging_zmq.rpc_use_acks:
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receiver = zmq_receivers.AckAndReplyReceiverProxy(conf)
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else:
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receiver = zmq_receivers.ReplyReceiverProxy(conf)
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super(DealerPublisherProxy, self).__init__(conf, matchmaker, sender,
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receiver)
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self.socket = self.sockets_manager.get_socket_to_publishers(
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self._generate_identity())
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self.routing_table = zmq_routing_table.RoutingTable(self.conf,
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self.matchmaker)
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self.connection_updater = \
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PublisherConnectionUpdater(self.conf, self.matchmaker, self.socket)
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def _generate_identity(self):
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return six.b(self.conf.oslo_messaging_zmq.rpc_zmq_host + "/" +
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str(uuid.uuid4()))
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def _check_received_data(self, reply_id, reply, request):
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super(DealerPublisherProxy, self)._check_received_data(reply_id, reply,
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request)
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assert reply_id == request.routing_key, \
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"Reply from recipient expected!"
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def _get_routing_keys(self, request):
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if request.msg_type in zmq_names.DIRECT_TYPES:
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return [self.routing_table.get_routable_host(request.target)]
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else:
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return \
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[zmq_address.target_to_subscribe_filter(request.target)] \
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if self.conf.oslo_messaging_zmq.use_pub_sub else \
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self.routing_table.get_all_hosts(request.target)
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def _send_request(self, request):
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routing_keys = [routing_key
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for routing_key in self._get_routing_keys(request)
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if routing_key is not None]
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if not routing_keys:
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LOG.warning(_LW("Matchmaker contains no records for specified "
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"target %(target)s. Dropping message %(msg_id)s.")
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% {"target": request.target,
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"msg_id": request.message_id})
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return None
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for routing_key in routing_keys:
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request.routing_key = routing_key
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self.sender.send(self.socket, request)
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return self.socket
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def cleanup(self):
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super(DealerPublisherProxy, self).cleanup()
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self.connection_updater.stop()
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self.socket.close()
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class PublisherConnectionUpdater(zmq_updater.ConnectionUpdater):
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def _update_connection(self):
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publishers = self.matchmaker.get_publishers()
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for pub_address, router_address in publishers:
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self.socket.connect_to_host(router_address)
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