66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 Nicira Networks, Inc
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# All Rights Reserved.
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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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# @author: Somik Behera, Nicira Networks, Inc.
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"""
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Quantum's Manager class is responsible for parsing a config file and
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instantiating the correct plugin that concretely implement quantum_plugin_base
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class.
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The caller should make sure that QuantumManager is a singleton.
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"""
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import gettext
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import os
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gettext.install('quantum', unicode=1)
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import os
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from common import utils
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from quantum_plugin_base import QuantumPluginBase
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CONFIG_FILE = "plugins.ini"
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def find_config(basepath):
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for root, dirs, files in os.walk(basepath):
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if CONFIG_FILE in files:
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return os.path.join(root, CONFIG_FILE)
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return None
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class QuantumManager(object):
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def __init__(self, config=None):
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if config == None:
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self.configuration_file = find_config(
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os.path.abspath(os.path.dirname(__file__)))
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else:
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self.configuration_file = config
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plugin_location = utils.getPluginFromConfig(self.configuration_file)
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print "PLUGIN LOCATION:%s" % plugin_location
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plugin_klass = utils.import_class(plugin_location)
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if not issubclass(plugin_klass, QuantumPluginBase):
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raise Exception("Configured Quantum plug-in " \
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"didn't pass compatibility test")
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else:
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print("Successfully imported Quantum plug-in." \
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"All compatibility tests passed\n")
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self.plugin = plugin_klass()
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def get_manager(self):
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return self.plugin
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