0ef0f165cb
Since our code will only support py3. So remove six is necessary. Change-Id: I3738118b1898421ee41e9e2902c255ead73f3915
69 lines
2.2 KiB
Python
69 lines
2.2 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2016 b<>com
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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 abc
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from watcher.common import service
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class Loadable(object, metaclass=abc.ABCMeta):
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"""Generic interface for dynamically loading a driver/entry point.
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This defines the contract in order to let the loader manager inject
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the configuration parameters during the loading.
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"""
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def __init__(self, config):
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super(Loadable, self).__init__()
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self.config = config
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@classmethod
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@abc.abstractmethod
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def get_config_opts(cls):
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"""Defines the configuration options to be associated to this loadable
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:return: A list of configuration options relative to this Loadable
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:rtype: list of :class:`oslo_config.cfg.Opt` instances
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"""
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raise NotImplementedError
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LoadableSingletonMeta = type(
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"LoadableSingletonMeta", (abc.ABCMeta, service.Singleton), {})
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class LoadableSingleton(object, metaclass=LoadableSingletonMeta):
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"""Generic interface for dynamically loading a driver as a singleton.
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This defines the contract in order to let the loader manager inject
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the configuration parameters during the loading. Classes inheriting from
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this class will be singletons.
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"""
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def __init__(self, config):
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super(LoadableSingleton, self).__init__()
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self.config = config
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@classmethod
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@abc.abstractmethod
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def get_config_opts(cls):
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"""Defines the configuration options to be associated to this loadable
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:return: A list of configuration options relative to this Loadable
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:rtype: list of :class:`oslo_config.cfg.Opt` instances
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"""
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raise NotImplementedError
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