122 lines
4.5 KiB
Python
122 lines
4.5 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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from oslo_messaging._drivers import base
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from oslo_messaging._drivers.zmq_driver.server.consumers\
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import zmq_consumer_base
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from oslo_messaging._drivers.zmq_driver.server import zmq_incoming_message
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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._i18n import _LE, _LI
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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class RouterIncomingMessage(base.IncomingMessage):
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def __init__(self, listener, context, message, socket, reply_id, msg_id,
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poller):
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super(RouterIncomingMessage, self).__init__(listener, context, message)
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self.socket = socket
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self.reply_id = reply_id
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self.msg_id = msg_id
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self.message = message
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poller.resume_polling(socket)
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def reply(self, reply=None, failure=None, log_failure=True):
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"""Reply is not needed for non-call messages"""
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def acknowledge(self):
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LOG.debug("Not sending acknowledge for %s", self.msg_id)
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def requeue(self):
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"""Requeue is not supported"""
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class RouterConsumer(zmq_consumer_base.SingleSocketConsumer):
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def __init__(self, conf, poller, server):
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super(RouterConsumer, self).__init__(conf, poller, server, zmq.ROUTER)
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self.matchmaker = server.matchmaker
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self.targets = []
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self.host = zmq_address.combine_address(self.conf.rpc_zmq_host,
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self.port)
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LOG.info(_LI("[%s] Run ROUTER consumer"), self.host)
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def listen(self, target):
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LOG.info(_LI("[%(host)s] Listen to target %(target)s"),
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{'host': self.host, 'target': target})
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self.targets.append(target)
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self.matchmaker.register(target, self.host,
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zmq_names.socket_type_str(zmq.ROUTER))
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def cleanup(self):
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super(RouterConsumer, self).cleanup()
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for target in self.targets:
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self.matchmaker.unregister(target, self.host,
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zmq_names.socket_type_str(zmq.ROUTER))
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def _receive_request(self, socket):
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reply_id = socket.recv()
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empty = socket.recv()
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assert empty == b'', 'Bad format: empty delimiter expected'
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request = socket.recv_pyobj()
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return request, reply_id
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def receive_message(self, socket):
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try:
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request, reply_id = self._receive_request(socket)
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LOG.debug("[%(host)s] Received %(type)s, %(id)s, %(target)s",
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{"host": self.host,
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"type": request.msg_type,
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"id": request.message_id,
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"target": request.target})
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if request.msg_type == zmq_names.CALL_TYPE:
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return zmq_incoming_message.ZmqIncomingRequest(
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self.server, socket, reply_id, request, self.poller)
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elif request.msg_type in zmq_names.NON_BLOCKING_TYPES:
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return RouterIncomingMessage(
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self.server, request.context, request.message, socket,
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reply_id, request.message_id, self.poller)
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else:
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LOG.error(_LE("Unknown message type: %s"), request.msg_type)
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except zmq.ZMQError as e:
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LOG.error(_LE("Receiving message failed: %s"), str(e))
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class RouterConsumerBroker(RouterConsumer):
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def __init__(self, conf, poller, server):
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super(RouterConsumerBroker, self).__init__(conf, poller, server)
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def _receive_request(self, socket):
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reply_id = socket.recv()
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empty = socket.recv()
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assert empty == b'', 'Bad format: empty delimiter expected'
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envelope = socket.recv_pyobj()
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request = socket.recv_pyobj()
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if zmq_names.FIELD_REPLY_ID in envelope:
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request.proxy_reply_id = envelope[zmq_names.FIELD_REPLY_ID]
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return request, reply_id
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