79 lines
2.9 KiB
Python
79 lines
2.9 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 oslo_messaging._drivers.zmq_driver.broker.zmq_base_proxy as base_proxy
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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_serializer
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from oslo_messaging._drivers.zmq_driver import zmq_topic
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from oslo_messaging._i18n import _LI
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zmq = zmq_async.import_zmq()
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LOG = logging.getLogger(__name__)
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class CastProxy(base_proxy.BaseProxy):
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def __init__(self, conf, context):
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super(CastProxy, self).__init__(conf, context)
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self.tcp_frontend = FrontendTcpPull(self.conf, context)
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self.backend_matcher = CastPushBackendMatcher(self.conf, context)
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LOG.info(_LI("Starting cast proxy thread"))
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def run(self):
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message = self.tcp_frontend.receive_incoming()
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if message is not None:
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self.backend_matcher.redirect_to_backend(message)
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class FrontendTcpPull(base_proxy.BaseTcpFrontend):
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def __init__(self, conf, context):
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poller = zmq_async.get_poller(native_zmq=conf.rpc_zmq_native)
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super(FrontendTcpPull, self).__init__(conf, poller, context)
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self.frontend = self.context.socket(zmq.PULL)
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address = zmq_topic.get_tcp_bind_address(conf.rpc_zmq_fanout_port)
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LOG.info(_LI("Binding to TCP PULL %s") % address)
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self.frontend.bind(address)
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self.poller.register(self.frontend)
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def _receive_message(self):
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message = self.poller.poll()
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return message
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class CastPushBackendMatcher(base_proxy.BaseBackendMatcher):
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def __init__(self, conf, context):
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poller = zmq_async.get_poller(native_zmq=conf.rpc_zmq_native)
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super(CastPushBackendMatcher, self).__init__(conf, poller, context)
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self.backend = self.context.socket(zmq.PUSH)
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def _get_topic(self, message):
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topic, server = zmq_serializer.get_topic_from_cast_message(message)
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return zmq_topic.Topic(self.conf, topic, server)
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def _get_ipc_address(self, topic):
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return zmq_topic.get_ipc_address_cast(self.conf, topic)
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def _send_message(self, backend, message, topic):
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backend.send_multipart(message)
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def _create_backend(self, ipc_address):
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LOG.debug("[Cast Proxy] Creating PUSH backend %s", ipc_address)
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self.backend.connect(ipc_address)
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self.backends[str(ipc_address)] = True
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