32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
# Copyright 2013 Mirantis, 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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from stevedore import extension
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_PLUGIN_MANAGER = None
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def get_plugin(plugin):
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global _PLUGIN_MANAGER
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plugin_manager = _PLUGIN_MANAGER
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if plugin_manager is None:
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PLUGINS_NAMESPACE = 'plugins'
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plugin_manager = extension.ExtensionManager(PLUGINS_NAMESPACE,
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invoke_on_load=True)
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_PLUGIN_MANAGER = plugin_manager
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return _PLUGIN_MANAGER[plugin].obj
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