136 lines
5.1 KiB
Python
136 lines
5.1 KiB
Python
# 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 random
|
|
import uuid
|
|
|
|
import six
|
|
|
|
from oslo_messaging._drivers.zmq_driver.client.publishers.dealer \
|
|
import zmq_dealer_publisher_base
|
|
from oslo_messaging._drivers.zmq_driver.client import zmq_receivers
|
|
from oslo_messaging._drivers.zmq_driver.client import zmq_routing_table
|
|
from oslo_messaging._drivers.zmq_driver.client import zmq_senders
|
|
from oslo_messaging._drivers.zmq_driver.matchmaker import zmq_matchmaker_base
|
|
from oslo_messaging._drivers.zmq_driver import zmq_address
|
|
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
|
|
|
|
|
|
zmq = zmq_async.import_zmq()
|
|
|
|
|
|
class DealerPublisherProxy(zmq_dealer_publisher_base.DealerPublisherBase):
|
|
"""DEALER-publisher via proxy."""
|
|
|
|
def __init__(self, conf, matchmaker):
|
|
sender = zmq_senders.RequestSenderProxy(conf)
|
|
receiver = zmq_receivers.ReceiverProxy(conf)
|
|
super(DealerPublisherProxy, self).__init__(conf, matchmaker,
|
|
sender, receiver)
|
|
|
|
self.socket = self.sockets_manager.get_socket_to_publishers(
|
|
self._generate_identity())
|
|
self.routing_table = zmq_routing_table.RoutingTableAdaptor(
|
|
conf, matchmaker, zmq.DEALER)
|
|
self.connection_updater = PublisherConnectionUpdater(
|
|
self.conf, self.matchmaker, self.socket)
|
|
|
|
def _generate_identity(self):
|
|
return six.b(self.conf.oslo_messaging_zmq.rpc_zmq_host + "/" +
|
|
str(uuid.uuid4()))
|
|
|
|
def _check_reply(self, reply, request):
|
|
super(DealerPublisherProxy, self)._check_reply(reply, request)
|
|
assert reply.reply_id == request.routing_key, \
|
|
"Reply from recipient expected!"
|
|
|
|
def _get_routing_keys(self, request):
|
|
if request.msg_type in zmq_names.DIRECT_TYPES:
|
|
return [self.routing_table.get_round_robin_host(request.target)]
|
|
else:
|
|
return \
|
|
[zmq_address.target_to_subscribe_filter(request.target)] \
|
|
if self.conf.oslo_messaging_zmq.use_pub_sub else \
|
|
self.routing_table.get_fanout_hosts(request.target)
|
|
|
|
def acquire_connection(self, request):
|
|
return self.socket
|
|
|
|
def send_request(self, socket, request):
|
|
for routing_key in self._get_routing_keys(request):
|
|
request.routing_key = routing_key
|
|
self.sender.send(socket, request)
|
|
|
|
def cleanup(self):
|
|
self.connection_updater.stop()
|
|
self.routing_table.cleanup()
|
|
self.socket.close()
|
|
super(DealerPublisherProxy, self).cleanup()
|
|
|
|
|
|
class PublisherConnectionUpdater(zmq_updater.ConnectionUpdater):
|
|
|
|
def _update_connection(self):
|
|
publishers = self.matchmaker.get_publishers()
|
|
for pub_address, fe_router_address in publishers:
|
|
self.socket.connect_to_host(fe_router_address)
|
|
|
|
|
|
class DealerPublisherProxyDynamic(
|
|
zmq_dealer_publisher_base.DealerPublisherBase):
|
|
|
|
def __init__(self, conf, matchmaker):
|
|
sender = zmq_senders.RequestSenderProxy(conf)
|
|
receiver = zmq_receivers.ReceiverDirect(conf)
|
|
super(DealerPublisherProxyDynamic, self).__init__(conf, matchmaker,
|
|
sender, receiver)
|
|
|
|
self.publishers = set()
|
|
self.updater = DynamicPublishersUpdater(conf, matchmaker,
|
|
self.publishers)
|
|
self.updater.update_publishers()
|
|
|
|
def acquire_connection(self, request):
|
|
if not self.publishers:
|
|
raise zmq_matchmaker_base.MatchmakerUnavailable()
|
|
socket = self.sockets_manager.get_socket()
|
|
socket.connect_to_host(random.choice(tuple(self.publishers)))
|
|
return socket
|
|
|
|
def send_request(self, socket, request):
|
|
request.routing_key = \
|
|
zmq_address.target_to_subscribe_filter(request.target)
|
|
self.sender.send(socket, request)
|
|
|
|
def cleanup(self):
|
|
self.updater.cleanup()
|
|
super(DealerPublisherProxyDynamic, self).cleanup()
|
|
|
|
|
|
class DynamicPublishersUpdater(zmq_updater.UpdaterBase):
|
|
|
|
def __init__(self, conf, matchmaker, publishers):
|
|
super(DynamicPublishersUpdater, self).__init__(
|
|
conf, matchmaker, self.update_publishers,
|
|
sleep_for=conf.oslo_messaging_zmq.zmq_target_update
|
|
)
|
|
self.publishers = publishers
|
|
|
|
def update_publishers(self):
|
|
publishers = self.matchmaker.get_publishers()
|
|
for pub_address, fe_router_address in publishers:
|
|
self.publishers.add(fe_router_address)
|