124 lines
4.9 KiB
Python
124 lines
4.9 KiB
Python
# Copyright 2016 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.client.publishers\
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import zmq_publisher_base
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from oslo_messaging._drivers.zmq_driver.client import zmq_response
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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 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 DealerIncomingMessage(base.RpcIncomingMessage):
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def __init__(self, context, message, msg_id):
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super(DealerIncomingMessage, self).__init__(context, message)
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self.msg_id = msg_id
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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 DealerIncomingRequest(base.RpcIncomingMessage):
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def __init__(self, socket, request, envelope):
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super(DealerIncomingRequest, self).__init__(request.context,
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request.message)
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self.reply_socket = socket
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self.request = request
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self.envelope = envelope
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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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response = zmq_response.Response(type=zmq_names.REPLY_TYPE,
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message_id=self.request.message_id,
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reply_id=self.envelope.reply_id,
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reply_body=reply,
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failure=failure,
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log_failure=log_failure)
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LOG.debug("Replying %s", (str(self.request.message_id)))
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self.envelope.routing_key = self.envelope.reply_id
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self.envelope.msg_type = zmq_names.REPLY_TYPE
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self.reply_socket.send(b'', zmq.SNDMORE)
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self.reply_socket.send_pyobj(self.envelope, zmq.SNDMORE)
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self.reply_socket.send_pyobj(response)
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def requeue(self):
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"""Requeue is not supported"""
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class DealerConsumer(zmq_consumer_base.ConsumerBase):
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def __init__(self, conf, poller, server):
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super(DealerConsumer, self).__init__(conf, poller, server)
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self.matchmaker = server.matchmaker
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self.target = server.target
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self.sockets_manager = zmq_publisher_base.SocketsManager(
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conf, self.matchmaker, zmq.ROUTER, zmq.DEALER)
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self.socket = self.sockets_manager.get_socket_to_publishers()
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self.poller.register(self.socket, self.receive_message)
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self.host = self.socket.handle.identity
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self.target_updater = zmq_consumer_base.TargetUpdater(
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conf, self.matchmaker, self.target, self.host,
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zmq.DEALER)
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LOG.info(_LI("[%s] Run DEALER consumer"), self.host)
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def _receive_request(self, socket):
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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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return request, envelope
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def receive_message(self, socket):
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try:
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request, envelope = 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 DealerIncomingRequest(socket, request, envelope)
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elif request.msg_type in zmq_names.NON_BLOCKING_TYPES:
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return DealerIncomingMessage(request.context, request.message,
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request.message_id)
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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, AssertionError) as e:
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LOG.error(_LE("Receiving message failure: %s"), str(e))
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