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
|
# 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
from oslo_messaging._drivers import common as rpc_common
from oslo_messaging._drivers.zmq_driver.rpc.client import zmq_cast_publisher
from oslo_messaging._drivers.zmq_driver.rpc.client.zmq_request import Request
from oslo_messaging._drivers.zmq_driver import zmq_async
from oslo_messaging._drivers.zmq_driver import zmq_serializer
from oslo_messaging._drivers.zmq_driver import zmq_target
from oslo_messaging._i18n import _LE, _LI
LOG = logging.getLogger(__name__)
zmq = zmq_async.import_zmq()
class CastRequest(Request):
msg_type = zmq_serializer.CAST_TYPE
def __call__(self, *args, **kwargs):
self.send_request()
def send_request(self):
self.socket.send(b'', zmq.SNDMORE)
super(CastRequest, self).send_request()
def receive_reply(self):
# Ignore reply for CAST
pass
class FanoutRequest(CastRequest):
msg_type = zmq_serializer.FANOUT_TYPE
def __init__(self, *args, **kwargs):
self.hosts_count = kwargs.pop("hosts_count")
super(FanoutRequest, self).__init__(*args, **kwargs)
def send_request(self):
for _ in range(self.hosts_count):
super(FanoutRequest, self).send_request()
class DealerCastPublisher(zmq_cast_publisher.CastPublisherBase):
def __init__(self, conf, matchmaker):
super(DealerCastPublisher, self).__init__(conf)
self.matchmaker = matchmaker
def cast(self, target, context,
message, timeout=None, retry=None):
if str(target) in self.outbound_sockets:
dealer_socket, hosts = self.outbound_sockets[str(target)]
else:
dealer_socket = zmq.Context().socket(zmq.DEALER)
hosts = self.matchmaker.get_hosts(target)
for host in hosts:
self._connect_to_host(dealer_socket, host)
self.outbound_sockets[str(target)] = (dealer_socket, hosts)
if target.fanout:
request = FanoutRequest(self.conf, target, context, message,
dealer_socket, timeout, retry,
hosts_count=len(hosts))
else:
request = CastRequest(self.conf, target, context, message,
dealer_socket, timeout, retry)
request.send_request()
def _connect_to_host(self, socket, host):
address = zmq_target.get_tcp_direct_address(host)
try:
LOG.info(_LI("Connecting DEALER to %s") % address)
socket.connect(address)
except zmq.ZMQError as e:
errmsg = _LE("Failed connecting DEALER to %(address)s: %(e)s")\
% (address, e)
LOG.error(errmsg)
raise rpc_common.RPCException(errmsg)
def cleanup(self):
for socket, hosts in self.outbound_sockets.values():
socket.setsockopt(zmq.LINGER, 0)
socket.close()
|
