/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/zmq_driver/server/consumers/zmq_dealer_consumer.py is in python-oslo.messaging 5.10.0-2.
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 | # Copyright 2016 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 uuid
import six
from oslo_messaging._drivers import common as rpc_common
from oslo_messaging._drivers.zmq_driver.client import zmq_senders
from oslo_messaging._drivers.zmq_driver.client import zmq_sockets_manager
from oslo_messaging._drivers.zmq_driver.server.consumers \
import zmq_consumer_base
from oslo_messaging._drivers.zmq_driver.server import zmq_incoming_message
from oslo_messaging._drivers.zmq_driver.server import zmq_ttl_cache
from oslo_messaging._drivers.zmq_driver import zmq_address
from oslo_messaging._drivers.zmq_driver import zmq_async
from oslo_messaging._drivers.zmq_driver import zmq_names
from oslo_messaging._drivers.zmq_driver import zmq_updater
from oslo_messaging._i18n import _LE, _LI, _LW
LOG = logging.getLogger(__name__)
zmq = zmq_async.import_zmq()
class DealerConsumer(zmq_consumer_base.SingleSocketConsumer):
def __init__(self, conf, poller, server):
self.ack_sender = zmq_senders.AckSenderProxy(conf)
self.reply_sender = zmq_senders.ReplySenderProxy(conf)
self.received_messages = zmq_ttl_cache.TTLCache(
ttl=conf.oslo_messaging_zmq.rpc_message_ttl
)
self.sockets_manager = zmq_sockets_manager.SocketsManager(
conf, server.matchmaker, zmq.ROUTER, zmq.DEALER)
self.host = None
super(DealerConsumer, self).__init__(conf, poller, server, zmq.DEALER)
self.connection_updater = ConsumerConnectionUpdater(
conf, self.matchmaker, self.socket)
LOG.info(_LI("[%s] Run DEALER consumer"), self.host)
def _generate_identity(self):
return six.b(self.conf.oslo_messaging_zmq.rpc_zmq_host + "/" +
zmq_address.target_to_key(self.target) + "/" +
str(uuid.uuid4()))
def subscribe_socket(self, socket_type):
try:
socket = self.sockets_manager.get_socket_to_routers(
self._generate_identity())
self.sockets.append(socket)
self.host = socket.handle.identity
self.poller.register(socket, self.receive_message)
return socket
except zmq.ZMQError as e:
LOG.error(_LE("Failed connecting to ROUTER socket %(e)s") % e)
raise rpc_common.RPCException(str(e))
def _receive_request(self, socket):
empty = socket.recv()
assert empty == b'', 'Bad format: empty delimiter expected'
reply_id = socket.recv()
msg_type = int(socket.recv())
message_id = socket.recv_string()
context, message = socket.recv_loaded()
return reply_id, msg_type, message_id, context, message
def receive_message(self, socket):
try:
reply_id, msg_type, message_id, context, message = \
self._receive_request(socket)
if msg_type == zmq_names.CALL_TYPE or \
msg_type in zmq_names.NON_BLOCKING_TYPES:
ack_sender = self.ack_sender \
if self.conf.oslo_messaging_zmq.rpc_use_acks else None
reply_sender = self.reply_sender \
if msg_type == zmq_names.CALL_TYPE else None
message = zmq_incoming_message.ZmqIncomingMessage(
context, message, reply_id, message_id, socket,
ack_sender, reply_sender
)
# drop duplicate message
if message_id in self.received_messages:
LOG.warning(
_LW("[%(host)s] Dropping duplicate %(msg_type)s "
"message %(msg_id)s"),
{"host": self.host,
"msg_type": zmq_names.message_type_str(msg_type),
"msg_id": message_id}
)
message.acknowledge()
return None
self.received_messages.add(message_id)
LOG.debug(
"[%(host)s] Received %(msg_type)s message %(msg_id)s",
{"host": self.host,
"msg_type": zmq_names.message_type_str(msg_type),
"msg_id": message_id}
)
return message
else:
LOG.error(_LE("Unknown message type: %s"),
zmq_names.message_type_str(msg_type))
except (zmq.ZMQError, AssertionError, ValueError) as e:
LOG.error(_LE("Receiving message failure: %s"), str(e))
def cleanup(self):
LOG.info(_LI("[%s] Destroy DEALER consumer"), self.host)
self.received_messages.cleanup()
self.connection_updater.cleanup()
super(DealerConsumer, self).cleanup()
class ConsumerConnectionUpdater(zmq_updater.ConnectionUpdater):
def _update_connection(self):
routers = self.matchmaker.get_routers()
for router_address in routers:
self.socket.connect_to_host(router_address)
|