208 lines
7.1 KiB
Python
208 lines
7.1 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 abc
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import logging
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import threading
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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_version
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LOG = logging.getLogger(__name__)
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zmq = zmq_async.import_zmq()
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@six.add_metaclass(abc.ABCMeta)
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class SenderBase(object):
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"""Base request/response sending interface."""
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def __init__(self, conf, use_async=False):
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self.conf = conf
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self.use_async = use_async
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self._lock = threading.Lock()
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self._send_versions = zmq_version.get_method_versions(self, 'send')
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def _get_send_version(self, version):
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send_version = self._send_versions.get(version)
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if send_version is None:
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raise zmq_version.UnsupportedMessageVersionError(version)
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return send_version
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@abc.abstractmethod
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def send(self, socket, message):
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"""Send a message via a socket in a thread-safe manner."""
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class RequestSenderBase(SenderBase):
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pass
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class AckSenderBase(SenderBase):
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pass
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class ReplySenderBase(SenderBase):
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pass
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class RequestSenderProxy(RequestSenderBase):
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def send(self, socket, request):
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assert request.msg_type in zmq_names.REQUEST_TYPES, "Request expected!"
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send_version = self._get_send_version(request.message_version)
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with self._lock:
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send_version(socket, request)
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LOG.debug("->[proxy:%(addr)s] Sending %(msg_type)s message "
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"%(msg_id)s to target %(target)s (v%(msg_version)s)",
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{"addr": list(socket.connections),
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"msg_type": zmq_names.message_type_str(request.msg_type),
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"msg_id": request.message_id,
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"target": request.target,
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"msg_version": request.message_version})
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def _send_v_1_0(self, socket, request):
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socket.send(b'', zmq.SNDMORE)
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socket.send_string('1.0', zmq.SNDMORE)
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socket.send(six.b(str(request.msg_type)), zmq.SNDMORE)
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socket.send(request.routing_key, zmq.SNDMORE)
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socket.send_string(request.message_id, zmq.SNDMORE)
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socket.send_dumped([request.context, request.message])
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class AckSenderProxy(AckSenderBase):
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def send(self, socket, ack):
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assert ack.msg_type == zmq_names.ACK_TYPE, "Ack expected!"
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send_version = self._get_send_version(ack.message_version)
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with self._lock:
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send_version(socket, ack)
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LOG.debug("->[proxy:%(addr)s] Sending %(msg_type)s for %(msg_id)s "
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"(v%(msg_version)s)",
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{"addr": list(socket.connections),
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"msg_type": zmq_names.message_type_str(ack.msg_type),
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"msg_id": ack.message_id,
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"msg_version": ack.message_version})
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def _send_v_1_0(self, socket, ack):
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socket.send(b'', zmq.SNDMORE)
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socket.send_string('1.0', zmq.SNDMORE)
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socket.send(six.b(str(ack.msg_type)), zmq.SNDMORE)
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socket.send(ack.reply_id, zmq.SNDMORE)
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socket.send_string(ack.message_id)
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class ReplySenderProxy(ReplySenderBase):
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def send(self, socket, reply):
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assert reply.msg_type == zmq_names.REPLY_TYPE, "Reply expected!"
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send_version = self._get_send_version(reply.message_version)
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with self._lock:
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send_version(socket, reply)
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LOG.debug("->[proxy:%(addr)s] Sending %(msg_type)s for %(msg_id)s "
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"(v%(msg_version)s)",
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{"addr": list(socket.connections),
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"msg_type": zmq_names.message_type_str(reply.msg_type),
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"msg_id": reply.message_id,
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"msg_version": reply.message_version})
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def _send_v_1_0(self, socket, reply):
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socket.send(b'', zmq.SNDMORE)
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socket.send_string('1.0', zmq.SNDMORE)
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socket.send(six.b(str(reply.msg_type)), zmq.SNDMORE)
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socket.send(reply.reply_id, zmq.SNDMORE)
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socket.send_string(reply.message_id, zmq.SNDMORE)
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socket.send_dumped([reply.reply_body, reply.failure])
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class RequestSenderDirect(RequestSenderBase):
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def send(self, socket, request):
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assert request.msg_type in zmq_names.REQUEST_TYPES, "Request expected!"
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send_version = self._get_send_version(request.message_version)
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with self._lock:
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send_version(socket, request)
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LOG.debug("Sending %(msg_type)s message %(msg_id)s to "
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"target %(target)s (v%(msg_version)s)",
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{"msg_type": zmq_names.message_type_str(request.msg_type),
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"msg_id": request.message_id,
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"target": request.target,
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"msg_version": request.message_version})
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def _send_v_1_0(self, socket, request):
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flags = zmq.NOBLOCK if self.use_async else 0
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socket.send(b'', zmq.SNDMORE | flags)
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socket.send_string('1.0', zmq.SNDMORE | flags)
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socket.send(six.b(str(request.msg_type)), zmq.SNDMORE | flags)
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socket.send_string(request.message_id, zmq.SNDMORE | flags)
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socket.send_dumped([request.context, request.message], flags)
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class AckSenderDirect(AckSenderBase):
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def send(self, socket, ack):
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assert ack.msg_type == zmq_names.ACK_TYPE, "Ack expected!"
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send_version = self._get_send_version(ack.message_version)
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with self._lock:
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send_version(socket, ack)
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LOG.debug("Sending %(msg_type)s for %(msg_id)s (v%(msg_version)s)",
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{"msg_type": zmq_names.message_type_str(ack.msg_type),
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"msg_id": ack.message_id,
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"msg_version": ack.message_version})
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def _send_v_1_0(self, socket, ack):
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raise NotImplementedError()
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class ReplySenderDirect(ReplySenderBase):
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def send(self, socket, reply):
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assert reply.msg_type == zmq_names.REPLY_TYPE, "Reply expected!"
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send_version = self._get_send_version(reply.message_version)
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with self._lock:
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send_version(socket, reply)
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LOG.debug("Sending %(msg_type)s for %(msg_id)s (v%(msg_version)s)",
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{"msg_type": zmq_names.message_type_str(reply.msg_type),
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"msg_id": reply.message_id,
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"msg_version": reply.message_version})
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def _send_v_1_0(self, socket, reply):
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socket.send(reply.reply_id, zmq.SNDMORE)
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socket.send(b'', zmq.SNDMORE)
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socket.send_string('1.0', zmq.SNDMORE)
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socket.send(six.b(str(reply.msg_type)), zmq.SNDMORE)
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socket.send_string(reply.message_id, zmq.SNDMORE)
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socket.send_dumped([reply.reply_body, reply.failure])
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