010bc61cc9
The aim of this patchset is to change the default strategy and set invoke_on_load to False. Change-Id: I0e374993614f465b11a22e33008f7026642154ee
50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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#
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# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.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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#
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import abc
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from oslo_log import log
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import six
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from watcher.decision_engine.strategy.strategies.dummy_strategy import \
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DummyStrategy
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LOG = log.getLogger(__name__)
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@six.add_metaclass(abc.ABCMeta)
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class BaseStrategyLoader(object):
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default_strategy_cls = DummyStrategy
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@abc.abstractmethod
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def load_available_strategies(self):
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raise NotImplementedError()
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def load(self, strategy_to_load=None):
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strategy_selected = None
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try:
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available_strategies = self.load_available_strategies()
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LOG.debug("Available strategies: %s ", available_strategies)
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strategy_cls = available_strategies.get(
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strategy_to_load, self.default_strategy_cls
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)
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strategy_selected = strategy_cls()
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except Exception as exc:
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LOG.exception(exc)
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return strategy_selected
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