/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/zmq_driver/client/publishers/dealer/zmq_dealer_call_publisher.py is in python-oslo.messaging 4.6.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | # Copyright 2015 Mirantis, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
import threading
from concurrent import futures
import futurist
import oslo_messaging
from oslo_messaging._drivers import common as rpc_common
from oslo_messaging._drivers.zmq_driver.client.publishers \
import zmq_publisher_base
from oslo_messaging._drivers.zmq_driver import zmq_async
from oslo_messaging._drivers.zmq_driver import zmq_names
from oslo_messaging._i18n import _LW
LOG = logging.getLogger(__name__)
zmq = zmq_async.import_zmq()
class DealerCallPublisher(object):
"""Thread-safe CALL publisher
Used as faster and thread-safe publisher for CALL
instead of ReqPublisher.
"""
def __init__(self, conf, matchmaker):
super(DealerCallPublisher, self).__init__()
self.conf = conf
self.matchmaker = matchmaker
self.reply_waiter = ReplyWaiter(conf)
sockets_manager = zmq_publisher_base.SocketsManager(
conf, matchmaker, zmq.ROUTER, zmq.DEALER)
def _do_send_request(socket, request):
# DEALER socket specific envelope empty delimiter
socket.send(b'', zmq.SNDMORE)
socket.send_pyobj(request)
LOG.debug("Sent message_id %(message)s to a target %(target)s",
{"message": request.message_id,
"target": request.target})
self.sender = CallSender(sockets_manager, _do_send_request,
self.reply_waiter)
def send_request(self, request):
reply_future = self.sender.send_request(request)
try:
reply = reply_future.result(timeout=request.timeout)
except futures.TimeoutError:
raise oslo_messaging.MessagingTimeout(
"Timeout %s seconds was reached" % request.timeout)
finally:
self.reply_waiter.untrack_id(request.message_id)
LOG.debug("Received reply %s", reply)
if reply[zmq_names.FIELD_FAILURE]:
raise rpc_common.deserialize_remote_exception(
reply[zmq_names.FIELD_FAILURE],
request.allowed_remote_exmods)
else:
return reply[zmq_names.FIELD_REPLY]
def cleanup(self):
self.reply_waiter.cleanup()
self.sender.cleanup()
class CallSender(zmq_publisher_base.QueuedSender):
def __init__(self, sockets_manager, _do_send_request, reply_waiter):
super(CallSender, self).__init__(sockets_manager, _do_send_request)
assert reply_waiter, "Valid ReplyWaiter expected!"
self.reply_waiter = reply_waiter
def send_request(self, request):
reply_future = futurist.Future()
self.reply_waiter.track_reply(reply_future, request.message_id)
self.queue.put(request)
return reply_future
def _connect_socket(self, target):
socket = self.outbound_sockets.get_socket(target)
self.reply_waiter.poll_socket(socket)
return socket
class ReplyWaiter(object):
def __init__(self, conf):
self.conf = conf
self.replies = {}
self.poller = zmq_async.get_poller()
self.executor = zmq_async.get_executor(self.run_loop)
self.executor.execute()
self._lock = threading.Lock()
def track_reply(self, reply_future, message_id):
self._lock.acquire()
self.replies[message_id] = reply_future
self._lock.release()
def untrack_id(self, message_id):
self._lock.acquire()
self.replies.pop(message_id)
self._lock.release()
def poll_socket(self, socket):
def _receive_method(socket):
empty = socket.recv()
assert empty == b'', "Empty expected!"
reply = socket.recv_pyobj()
LOG.debug("Received reply %s", reply)
return reply
self.poller.register(socket, recv_method=_receive_method)
def run_loop(self):
reply, socket = self.poller.poll(
timeout=self.conf.rpc_poll_timeout)
if reply is not None:
reply_id = reply[zmq_names.FIELD_MSG_ID]
call_future = self.replies.get(reply_id)
if call_future:
call_future.set_result(reply)
else:
LOG.warning(_LW("Received timed out reply: %s"), reply_id)
def cleanup(self):
self.poller.close()
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