82 lines
2.8 KiB
Python
82 lines
2.8 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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import logging
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import uuid
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import six
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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._drivers.zmq_driver import zmq_socket
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from oslo_messaging._i18n import _LI, _LE
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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def check_message_format(func):
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def _check_message_format(socket):
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try:
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return func(socket)
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except Exception as e:
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LOG.error(_LE("Received message with wrong format: %r. "
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"Dropping invalid message"), e)
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# NOTE(gdavoian): drop the left parts of a broken message, since
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# they most likely will break the order of next messages' parts
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if socket.getsockopt(zmq.RCVMORE):
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socket.recv_multipart()
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return _check_message_format
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def create_socket(conf, context, port, socket_type):
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host = conf.zmq_proxy_opts.host
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identity = six.b(host) + b"/zmq-proxy/" + six.b(str(uuid.uuid4()))
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if port != 0:
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return zmq_socket.ZmqFixedPortSocket(conf, context, socket_type,
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host, port, identity=identity)
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else:
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return zmq_socket.ZmqRandomPortSocket(conf, context, socket_type,
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host, identity=identity)
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class ProxyBase(object):
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PROXY_TYPE = "UNDEFINED"
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def __init__(self, conf, context, matchmaker):
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self.conf = conf
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self.context = context
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self.matchmaker = matchmaker
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LOG.info(_LI("Running %s proxy") % self.PROXY_TYPE)
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self.poller = zmq_async.get_poller()
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@staticmethod
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@check_message_format
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def _receive_message(socket):
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message = socket.recv_multipart()
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assert message[zmq_names.EMPTY_IDX] == b'', "Empty delimiter expected!"
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message_type = int(message[zmq_names.MESSAGE_TYPE_IDX])
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assert message_type in zmq_names.MESSAGE_TYPES, \
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"Known message type expected!"
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assert len(message) > zmq_names.MESSAGE_ID_IDX, \
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"At least %d parts expected!" % (zmq_names.MESSAGE_ID_IDX + 1)
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return message
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def cleanup(self):
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self.poller.close()
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