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##############################################################################
# Copyright (c) 2015 Huawei Technologies Co.,Ltd and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
import stevedore
class VswitchPluginManager(object):
def __init__(self):
self.plugin = None
self.mgr = stevedore.extension.ExtensionManager(namespace="vswitch.plugins", invoke_on_load=True)
def clean(self):
if self.plugin:
self.plugin.clean()
self.plugin = None
for plugin in self.mgr.names():
self.mgr[plugin].obj.clean()
return True
def get_vs_plugin(self, plugin):
if plugin in self.mgr.names():
ext = self.mgr[plugin]
self.plugin = ext.obj
return self.plugin
else:
raise Exception("unsupported vswitch plugin: %s" % plugin)
def get_supported_plugins(self):
return self.mgr.names()
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