68 lines
2.5 KiB
Python
68 lines
2.5 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.zmq_driver.client.publishers \
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import zmq_publisher_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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zmq = zmq_async.import_zmq()
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LOG = logging.getLogger(__name__)
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class DealerPublisherProxy(object):
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def __init__(self, conf, matchmaker, poller):
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super(DealerPublisherProxy, self).__init__()
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self.conf = conf
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self.matchmaker = matchmaker
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self.poller = poller
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self.sockets_manager = zmq_publisher_base.SocketsManager(
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conf, matchmaker, zmq.ROUTER, zmq.DEALER)
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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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if envelope.is_mult_send:
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raise zmq_publisher_base.UnsupportedSendPattern(envelope.msg_type)
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if not envelope.target_hosts:
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raise Exception("Target hosts are expected!")
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dealer_socket = self.sockets_manager.get_socket_to_hosts(
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envelope.target, envelope.target_hosts)
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self.poller.register(dealer_socket.handle, self.receive_reply)
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LOG.debug("Sending message %(message)s to a target %(target)s"
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% {"message": envelope.message_id,
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"target": envelope.target})
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# Empty delimiter - DEALER socket specific
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dealer_socket.send(b'', zmq.SNDMORE)
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dealer_socket.send_pyobj(envelope, zmq.SNDMORE)
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dealer_socket.send(multipart_message[zmq_names.MULTIPART_IDX_BODY])
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def receive_reply(self, socket):
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empty = socket.recv()
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assert empty == b'', "Empty expected!"
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envelope = socket.recv_pyobj()
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assert envelope is not None, "Invalid envelope!"
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reply = socket.recv()
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LOG.debug("Received reply %s", reply)
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return [envelope, reply]
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def cleanup(self):
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self.sockets_manager.cleanup()
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