96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
#
|
|
# Copyright 2013 Red Hat, 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.
|
|
#
|
|
|
|
"""
|
|
Base RPC client and server common to all services.
|
|
"""
|
|
|
|
from oslo.config import cfg
|
|
|
|
from nova.openstack.common import jsonutils
|
|
from nova.openstack.common import rpc
|
|
import nova.openstack.common.rpc.proxy as rpc_proxy
|
|
|
|
|
|
CONF = cfg.CONF
|
|
rpcapi_cap_opt = cfg.StrOpt('baseapi',
|
|
help='Set a version cap for messages sent to the base api in any '
|
|
'service')
|
|
CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')
|
|
|
|
_NAMESPACE = 'baseapi'
|
|
|
|
|
|
class BaseAPI(rpc_proxy.RpcProxy):
|
|
"""Client side of the base rpc API.
|
|
|
|
API version history:
|
|
|
|
1.0 - Initial version.
|
|
1.1 - Add get_backdoor_port
|
|
"""
|
|
|
|
#
|
|
# NOTE(russellb): This is the default minimum version that the server
|
|
# (manager) side must implement unless otherwise specified using a version
|
|
# argument to self.call()/cast()/etc. here. It should be left as X.0 where
|
|
# X is the current major API version (1.0, 2.0, ...). For more information
|
|
# about rpc API versioning, see the docs in
|
|
# openstack/common/rpc/dispatcher.py.
|
|
#
|
|
BASE_RPC_API_VERSION = '1.0'
|
|
|
|
VERSION_ALIASES = {
|
|
# baseapi was added in havana
|
|
}
|
|
|
|
def __init__(self, topic):
|
|
version_cap = self.VERSION_ALIASES.get(CONF.upgrade_levels.baseapi,
|
|
CONF.upgrade_levels.baseapi)
|
|
super(BaseAPI, self).__init__(topic=topic,
|
|
default_version=self.BASE_RPC_API_VERSION,
|
|
version_cap=version_cap)
|
|
self.namespace = _NAMESPACE
|
|
|
|
def ping(self, context, arg, timeout=None):
|
|
arg_p = jsonutils.to_primitive(arg)
|
|
msg = self.make_namespaced_msg('ping', self.namespace, arg=arg_p)
|
|
return self.call(context, msg, timeout=timeout)
|
|
|
|
def get_backdoor_port(self, context, host):
|
|
msg = self.make_namespaced_msg('get_backdoor_port', self.namespace)
|
|
return self.call(context, msg,
|
|
topic=rpc.queue_get_for(context, self.topic, host),
|
|
version='1.1')
|
|
|
|
|
|
class BaseRPCAPI(object):
|
|
"""Server side of the base RPC API."""
|
|
|
|
RPC_API_NAMESPACE = _NAMESPACE
|
|
RPC_API_VERSION = '1.1'
|
|
|
|
def __init__(self, service_name, backdoor_port):
|
|
self.service_name = service_name
|
|
self.backdoor_port = backdoor_port
|
|
|
|
def ping(self, context, arg):
|
|
resp = {'service': self.service_name, 'arg': arg}
|
|
return jsonutils.to_primitive(resp)
|
|
|
|
def get_backdoor_port(self, context):
|
|
return self.backdoor_port
|