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# Copyright 2015-2016 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.
from oslo_messaging._drivers import common
from oslo_messaging._drivers.zmq_driver.client import zmq_client_base
from oslo_messaging._drivers.zmq_driver import zmq_async
from oslo_messaging._drivers.zmq_driver import zmq_names
zmq = zmq_async.import_zmq()
class WrongClientException(common.RPCException):
"""Raised if client type doesn't match configuration"""
class ZmqClientMixDirectPubSub(zmq_client_base.ZmqClientBase):
"""Client for using with direct connections and fanout over proxy:
use_pub_sub = true
use_router_proxy = false
"""
def __init__(self, conf, matchmaker=None, allowed_remote_exmods=None):
if conf.oslo_messaging_zmq.use_router_proxy or not \
conf.oslo_messaging_zmq.use_pub_sub:
raise WrongClientException()
publisher = self._create_publisher_direct_dynamic(conf, matchmaker) \
if conf.oslo_messaging_zmq.use_dynamic_connections else \
self._create_publisher_direct(conf, matchmaker)
publisher_proxy = self._create_publisher_proxy_dynamic(conf,
matchmaker) \
if conf.oslo_messaging_zmq.use_dynamic_connections else \
self._create_publisher_proxy(conf, matchmaker)
super(ZmqClientMixDirectPubSub, self).__init__(
conf, matchmaker, allowed_remote_exmods,
publishers={
zmq_names.CAST_FANOUT_TYPE: publisher_proxy,
zmq_names.NOTIFY_TYPE: publisher_proxy,
"default": publisher
}
)
class ZmqClientDirect(zmq_client_base.ZmqClientBase):
"""This kind of client (publishers combination) is to be used for
direct connections only:
use_pub_sub = false
use_router_proxy = false
"""
def __init__(self, conf, matchmaker=None, allowed_remote_exmods=None):
if conf.oslo_messaging_zmq.use_pub_sub or \
conf.oslo_messaging_zmq.use_router_proxy:
raise WrongClientException()
publisher = self._create_publisher_direct_dynamic(conf, matchmaker) \
if conf.oslo_messaging_zmq.use_dynamic_connections else \
self._create_publisher_direct(conf, matchmaker)
super(ZmqClientDirect, self).__init__(
conf, matchmaker, allowed_remote_exmods,
publishers={
"default": publisher
}
)
class ZmqClientProxy(zmq_client_base.ZmqClientBase):
"""Client for using with proxy:
use_pub_sub = true
use_router_proxy = true
or
use_pub_sub = false
use_router_proxy = true
"""
def __init__(self, conf, matchmaker=None, allowed_remote_exmods=None):
if not conf.oslo_messaging_zmq.use_router_proxy:
raise WrongClientException()
super(ZmqClientProxy, self).__init__(
conf, matchmaker, allowed_remote_exmods,
publishers={
"default": self._create_publisher_proxy(conf, matchmaker)
}
)
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