90 lines
3.4 KiB
Python
90 lines
3.4 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 common as rpc_common
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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 RouterConsumer(object):
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def __init__(self, conf, poller, server):
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self.conf = conf
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self.poller = poller
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self.server = server
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try:
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self.context = zmq.Context()
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self.socket = self.context.socket(zmq.ROUTER)
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self.address = zmq_address.get_tcp_random_address(conf)
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self.port = self.socket.bind_to_random_port(self.address)
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self.poller.register(self.socket, self._receive_message)
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LOG.info(_LI("Run ROUTER consumer on %(addr)s:%(port)d"),
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{"addr": self.address,
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"port": self.port})
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except zmq.ZMQError as e:
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errmsg = _LE("Failed binding to port %(port)d: %(e)s")\
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% (self.port, e)
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LOG.error(errmsg)
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raise rpc_common.RPCException(errmsg)
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def listen(self, target):
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LOG.info(_LI("Listen to target %s") % str(target))
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# Do nothing here because we have single socket
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def cleanup(self):
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if not self.socket.closed:
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self.socket.setsockopt(zmq.LINGER, 0)
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self.socket.close()
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def _receive_message(self, socket):
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try:
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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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msg_type = socket.recv_string()
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assert msg_type is not None, 'Bad format: msg type expected'
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context = socket.recv_json()
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message = socket.recv_json()
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LOG.info(_LI("Received %(msg_type)s message %(msg)s")
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% {"msg_type": msg_type,
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"msg": str(message)})
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if msg_type == zmq_names.CALL_TYPE:
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return zmq_incoming_message.ZmqIncomingRequest(
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self.server, context, message, socket, reply_id,
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self.poller)
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elif msg_type in zmq_names.CAST_TYPES:
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return zmq_incoming_message.ZmqCastMessage(
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self.server, context, message, socket, self.poller)
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elif msg_type in zmq_names.NOTIFY_TYPES:
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return zmq_incoming_message.ZmqNotificationMessage(
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self.server, context, message, socket, self.poller)
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else:
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LOG.error(_LE("Unknown message type: %s") % 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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