109 lines
3.8 KiB
Python
109 lines
3.8 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 concurrent import futures
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import futurist
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import oslo_messaging
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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.dealer \
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import zmq_reply_waiter
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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._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 DealerCallPublisher(object):
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"""Thread-safe CALL publisher
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Used as faster and thread-safe publisher for CALL
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instead of ReqPublisher.
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"""
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def __init__(self, conf, matchmaker, sockets_manager, sender=None,
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reply_waiter=None):
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super(DealerCallPublisher, self).__init__()
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self.conf = conf
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self.matchmaker = matchmaker
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self.reply_waiter = reply_waiter or zmq_reply_waiter.ReplyWaiter(conf)
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self.sockets_manager = sockets_manager
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self.sender = sender or CallSender(self.sockets_manager,
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self.reply_waiter)
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def send_request(self, request):
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reply_future = self.sender.send_request(request)
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try:
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reply = reply_future.result(timeout=request.timeout)
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LOG.debug("Received reply %s", request.message_id)
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except AssertionError:
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LOG.error(_LE("Message format error in reply %s"),
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request.message_id)
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return None
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except futures.TimeoutError:
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raise oslo_messaging.MessagingTimeout(
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"Timeout %(tout)s seconds was reached for message %(id)s" %
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{"tout": request.timeout,
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"id": request.message_id})
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finally:
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self.reply_waiter.untrack_id(request.message_id)
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if reply.failure:
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raise rpc_common.deserialize_remote_exception(
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reply.failure,
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request.allowed_remote_exmods)
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else:
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return reply.reply_body
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def cleanup(self):
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self.reply_waiter.cleanup()
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self.sender.cleanup()
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class CallSender(zmq_publisher_base.QueuedSender):
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def __init__(self, sockets_manager, reply_waiter):
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super(CallSender, self).__init__(sockets_manager,
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self._do_send_request)
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assert reply_waiter, "Valid ReplyWaiter expected!"
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self.reply_waiter = reply_waiter
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def _do_send_request(self, socket, request):
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envelope = request.create_envelope()
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# DEALER socket specific envelope empty delimiter
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socket.send(b'', zmq.SNDMORE)
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socket.send_pyobj(envelope, zmq.SNDMORE)
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socket.send_pyobj(request)
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LOG.debug("Sent message_id %(message)s to a target %(target)s",
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{"message": request.message_id,
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"target": request.target})
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def send_request(self, request):
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reply_future = futurist.Future()
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self.reply_waiter.track_reply(reply_future, request.message_id)
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self.queue.put(request)
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return reply_future
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def _connect_socket(self, target):
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socket = self.outbound_sockets.get_socket(target)
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self.reply_waiter.poll_socket(socket)
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return socket
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