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>
84 lines
2.6 KiB
Python
Executable File
84 lines
2.6 KiB
Python
Executable File
# Copyright 2015 Huawei Technologies Co., Ltd.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import six
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from oslo_messaging import Serializer
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ATTR_NOT_SPECIFIED = object()
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class Mapping(object):
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def __init__(self, mapping):
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self.direct_mapping = mapping
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self.reverse_mapping = {}
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for key, value in six.iteritems(mapping):
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self.reverse_mapping[value] = key
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_SINGLETON_MAPPING = Mapping({
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ATTR_NOT_SPECIFIED: "@@**ATTR_NOT_SPECIFIED**@@",
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})
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class TricircleSerializer(Serializer):
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def __init__(self, base=None):
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super(TricircleSerializer, self).__init__()
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self._base = base
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def serialize_entity(self, context, entity):
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if isinstance(entity, dict):
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for key, value in six.iteritems(entity):
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entity[key] = self.serialize_entity(context, value)
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elif isinstance(entity, list):
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for i, item in enumerate(entity):
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entity[i] = self.serialize_entity(context, item)
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elif entity in _SINGLETON_MAPPING.direct_mapping:
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entity = _SINGLETON_MAPPING.direct_mapping[entity]
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if self._base is not None:
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entity = self._base.serialize_entity(context, entity)
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return entity
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def deserialize_entity(self, context, entity):
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if isinstance(entity, dict):
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for key, value in six.iteritems(entity):
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entity[key] = self.deserialize_entity(context, value)
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elif isinstance(entity, list):
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for i, item in enumerate(entity):
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entity[i] = self.deserialize_entity(context, item)
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elif entity in _SINGLETON_MAPPING.reverse_mapping:
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entity = _SINGLETON_MAPPING.reverse_mapping[entity]
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if self._base is not None:
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entity = self._base.deserialize_entity(context, entity)
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return entity
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def serialize_context(self, context):
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if self._base is not None:
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context = self._base.serialize_context(context)
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return context
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def deserialize_context(self, context):
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if self._base is not None:
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context = self._base.deserialize_context(context)
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return context
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