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# 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
# 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.
# copy and modify from OpenStack Nova
Base RPC client and server common to all services.
from oslo_config import cfg
import oslo_messaging as messaging
from oslo_serialization import jsonutils
from tricircle.common import rpc
rpcapi_cap_opt = cfg.StrOpt('baseclientapi',
help='Set a version cap for messages sent to the'
'base api in any service')
CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')
_NAMESPACE = 'baseclientapi'
class BaseClientAPI(object):
"""Client side of the base rpc API.
API version history:
1.0 - Initial version.
# baseapi was added in the first version of Tricircle
def __init__(self, topic):
super(BaseClientAPI, self).__init__()
target = messaging.Target(topic=topic,
version_cap = self.VERSION_ALIASES.get(CONF.upgrade_levels.baseapi,
self.client = rpc.get_client(target, version_cap=version_cap)
def ping(self, context, arg, timeout=None):
arg_p = jsonutils.to_primitive(arg)
cctxt = self.client.prepare(timeout=timeout)
return, 'ping', arg=arg_p)
class BaseServerRPCAPI(object):
"""Server side of the base RPC API."""
target = messaging.Target(namespace=_NAMESPACE, version='1.0')
def __init__(self, service_name):
self.service_name = service_name
def ping(self, context, arg):
resp = {'service': self.service_name, 'arg': arg}
return jsonutils.to_primitive(resp)