94 lines
3.7 KiB
Python
94 lines
3.7 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 import common as rpc_common
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from oslo_messaging._drivers.zmq_driver.rpc.server import zmq_base_consumer
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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 as topic_utils
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from oslo_messaging._i18n import _LE
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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class ZmqIncomingRequest(base.IncomingMessage):
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def __init__(self, listener, context, message, socket, rep_id, poller):
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super(ZmqIncomingRequest, self).__init__(listener, context, message)
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self.reply_socket = socket
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self.reply_id = rep_id
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self.received = None
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self.poller = poller
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def reply(self, reply=None, failure=None, log_failure=True):
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if failure is not None:
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failure = rpc_common.serialize_remote_exception(failure,
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log_failure)
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message_reply = {zmq_serializer.FIELD_REPLY: reply,
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zmq_serializer.FIELD_FAILURE: failure,
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zmq_serializer.FIELD_LOG_FAILURE: log_failure}
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LOG.debug("Replying %s REP", (str(message_reply)))
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self.received = True
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self.reply_socket.send(self.reply_id, zmq.SNDMORE)
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self.reply_socket.send(b'', zmq.SNDMORE)
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self.reply_socket.send_json(message_reply)
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self.poller.resume_polling(self.reply_socket)
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def acknowledge(self):
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pass
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def requeue(self):
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pass
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class CallResponder(zmq_base_consumer.ConsumerBase):
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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 separator 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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topic = socket.recv_string()
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assert topic is not None, 'Bad format: topic string expected'
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msg_id = socket.recv_string()
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assert msg_id is not None, 'Bad format: message ID expected'
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context = socket.recv_json()
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message = socket.recv_json()
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LOG.debug("[Server] REP Received message %s" % str(message))
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incoming = ZmqIncomingRequest(self.listener,
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context,
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message, socket,
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reply_id,
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self.poller)
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return incoming
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except zmq.ZMQError as e:
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LOG.error(_LE("Receiving message failed ... {}"), e)
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def listen(self, target):
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topic = topic_utils.Topic.from_target(self.conf, target)
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ipc_rep_address = topic_utils.get_ipc_address_call(self.conf, topic)
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rep_socket = self.context.socket(zmq.REP)
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rep_socket.bind(ipc_rep_address)
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self.sockets_per_topic[str(topic)] = rep_socket
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self.poller.register(rep_socket, self._receive_message)
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