112 lines
3.8 KiB
Python
112 lines
3.8 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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from concurrent import futures
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import logging
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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, _LW
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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class AckManagerBase(object):
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def __init__(self, publisher):
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self.publisher = publisher
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self.conf = publisher.conf
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self.sender = publisher.sender
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self.receiver = publisher.receiver
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def send_call(self, request):
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return self.publisher.send_call(request)
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def send_cast(self, request):
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self.publisher.send_cast(request)
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def send_fanout(self, request):
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self.publisher.send_fanout(request)
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def send_notify(self, request):
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self.publisher.send_notify(request)
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def cleanup(self):
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self.publisher.cleanup()
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class AckManagerDirect(AckManagerBase):
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pass
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class AckManagerProxy(AckManagerBase):
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def __init__(self, publisher):
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super(AckManagerProxy, self).__init__(publisher)
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self._pool = zmq_async.get_pool(
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size=self.conf.oslo_messaging_zmq.rpc_thread_pool_size
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)
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def _wait_for_ack(self, ack_future):
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request, socket = ack_future.args
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retries = \
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request.retry or self.conf.oslo_messaging_zmq.rpc_retry_attempts
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timeout = self.conf.oslo_messaging_zmq.rpc_ack_timeout_base
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done = False
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while not done:
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try:
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reply_id, response = ack_future.result(timeout=timeout)
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done = True
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assert response is None, "Ack expected!"
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assert reply_id == request.routing_key, \
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"Ack from recipient expected!"
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except AssertionError:
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LOG.error(_LE("Message format error in ack for %s"),
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request.message_id)
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except futures.TimeoutError:
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LOG.warning(_LW("No ack received within %(tout)s seconds "
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"for %(msg_id)s"),
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{"tout": timeout,
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"msg_id": request.message_id})
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if retries is None or retries != 0:
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if retries is not None and retries > 0:
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retries -= 1
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self.sender.send(socket, request)
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timeout *= \
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self.conf.oslo_messaging_zmq.rpc_ack_timeout_multiplier
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else:
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LOG.warning(_LW("Exhausted number of retries for %s"),
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request.message_id)
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done = True
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self.receiver.untrack_request(request)
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def _get_ack_future(self, request):
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socket = self.publisher.connect_socket(request)
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self.receiver.register_socket(socket)
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ack_future = self.receiver.track_request(request)[zmq_names.ACK_TYPE]
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ack_future.args = request, socket
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return ack_future
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def send_cast(self, request):
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self.publisher.send_cast(request)
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self._pool.submit(self._wait_for_ack, self._get_ack_future(request))
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def cleanup(self):
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self._pool.shutdown(wait=True)
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super(AckManagerProxy, self).cleanup()
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