74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
# 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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Client side of the senlin engine RPC API.
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"""
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from oslo_config import cfg
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from senlin.common import consts
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from senlin.common import messaging
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from senlin.objects import base as object_base
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_CLIENT = None
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def get_engine_client():
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global _CLIENT
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if not _CLIENT:
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_CLIENT = EngineClient()
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return _CLIENT
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class EngineClient(object):
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"""Client side of the senlin engine rpc API.
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Version History:
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1.0 - Initial version (Mitaka 1.0 release)
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1.1 - Add cluster-collect call.
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"""
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def __init__(self):
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serializer = object_base.VersionedObjectSerializer()
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self._client = messaging.get_rpc_client(consts.CONDUCTOR_TOPIC,
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cfg.CONF.host,
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serializer=serializer)
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@staticmethod
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def make_msg(method, **kwargs):
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return method, kwargs
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def call(self, ctxt, method, req, version=None):
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"""The main entry for invoking engine service.
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:param ctxt: The request context object.
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:param method: The name of the method to be invoked.
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:param req: A dict containing a request object.
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:param version: The engine RPC API version requested.
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"""
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if version is not None:
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client = self._client.prepare(version=version)
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else:
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client = self._client
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return client.call(ctxt, method, req=req)
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def cast(self, ctxt, msg, version=None):
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method, kwargs = msg
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if version is not None:
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client = self._client.prepare(version=version)
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else:
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client = self._client
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return client.cast(ctxt, method, **kwargs)
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