81b45f2c1d
The statless design was developed in the experiment branch, the experiment shows advantage in removing the status synchronization, uuid mapping compared to the stateful design, and also fully reduce the coupling with OpenStack services like Nova, Cinder. The overhead query latency for resources also acceptable. It's time to move the statless design to the master branch BP: https://blueprints.launchpad.net/tricircle/+spec/implement-stateless Change-Id: I51bbb60dc07da5b2e79f25e02209aa2eb72711ac Signed-off-by: Chaoyi Huang <joehuang@huawei.com>
76 lines
2.3 KiB
Python
Executable File
76 lines
2.3 KiB
Python
Executable File
#
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# Copyright 2013 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# copy and modify from OpenStack Nova
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"""
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Base RPC client and server common to all services.
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"""
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from oslo_config import cfg
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import oslo_messaging as messaging
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from oslo_serialization import jsonutils
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from tricircle.common import rpc
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CONF = cfg.CONF
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rpcapi_cap_opt = cfg.StrOpt('baseclientapi',
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help='Set a version cap for messages sent to the'
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'base api in any service')
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CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')
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_NAMESPACE = 'baseclientapi'
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class BaseClientAPI(object):
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"""Client side of the base rpc API.
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API version history:
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1.0 - Initial version.
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"""
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VERSION_ALIASES = {
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# baseapi was added in the first version of Tricircle
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}
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def __init__(self, topic):
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super(BaseClientAPI, self).__init__()
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target = messaging.Target(topic=topic,
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namespace=_NAMESPACE,
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version='1.0')
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version_cap = self.VERSION_ALIASES.get(CONF.upgrade_levels.baseapi,
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CONF.upgrade_levels.baseapi)
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self.client = rpc.get_client(target, version_cap=version_cap)
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def ping(self, context, arg, timeout=None):
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arg_p = jsonutils.to_primitive(arg)
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cctxt = self.client.prepare(timeout=timeout)
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return cctxt.call(context, 'ping', arg=arg_p)
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class BaseServerRPCAPI(object):
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"""Server side of the base RPC API."""
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target = messaging.Target(namespace=_NAMESPACE, version='1.0')
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def __init__(self, service_name):
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self.service_name = service_name
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def ping(self, context, arg):
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resp = {'service': self.service_name, 'arg': arg}
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return jsonutils.to_primitive(resp)
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