88 lines
3.1 KiB
Python
88 lines
3.1 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.zmq_driver.client.publishers.dealer \
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import zmq_dealer_publisher
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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 _LI, _LW
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zmq = zmq_async.import_zmq()
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LOG = logging.getLogger(__name__)
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class DealerPublisherProxy(zmq_dealer_publisher.DealerPublisher):
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def __init__(self, conf, matchmaker, reply_receiver):
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super(DealerPublisherProxy, self).__init__(conf, matchmaker)
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self.reply_receiver = reply_receiver
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def send_request(self, multipart_message):
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envelope = multipart_message[zmq_names.MULTIPART_IDX_ENVELOPE]
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LOG.debug("Envelope: %s", envelope)
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target = envelope[zmq_names.FIELD_TARGET]
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dealer_socket = self._check_hosts_connections(
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target, zmq_names.socket_type_str(zmq.ROUTER))
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if not dealer_socket.connections:
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# NOTE(ozamiatin): Here we can provide
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# a queue for keeping messages to send them later
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# when some listener appears. However such approach
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# being more reliable will consume additional memory.
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LOG.warning(_LW("Request %s was dropped because no connection"),
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envelope[zmq_names.FIELD_MSG_TYPE])
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return
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self.reply_receiver.track_socket(dealer_socket.handle)
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LOG.debug("Sending message %(message)s to a target %(target)s"
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% {"message": envelope[zmq_names.FIELD_MSG_ID],
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"target": envelope[zmq_names.FIELD_TARGET]})
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if envelope[zmq_names.FIELD_MSG_TYPE] in zmq_names.MULTISEND_TYPES:
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for _ in range(dealer_socket.connections_count()):
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self._send_request(dealer_socket, multipart_message)
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else:
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self._send_request(dealer_socket, multipart_message)
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def _send_request(self, socket, multipart_message):
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socket.send(b'', zmq.SNDMORE)
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socket.send_pyobj(
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multipart_message[zmq_names.MULTIPART_IDX_ENVELOPE],
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zmq.SNDMORE)
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socket.send(multipart_message[zmq_names.MULTIPART_IDX_BODY])
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class ReplyReceiver(object):
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def __init__(self, poller):
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self.poller = poller
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LOG.info(_LI("Reply waiter created in broker"))
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def _receive_reply(self, socket):
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return socket.recv_multipart()
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def track_socket(self, socket):
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self.poller.register(socket, self._receive_reply)
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def cleanup(self):
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self.poller.close()
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