ff78b92048
* Remove dependency on ansible and libvirt libraries * Bump python 3 version to 3.6 * Fix python warnings in the code Change-Id: If7b495e9c3b2f5031d535954c3c3280e247871a6
99 lines
3.0 KiB
Python
99 lines
3.0 KiB
Python
# 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 inspect
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import os
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import sys
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from oslo_utils import importutils
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import os_faults
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from os_faults.api import base_driver
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from os_faults.api import error
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DRIVERS = {}
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def _import_modules_from_package():
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folder = os.path.dirname(os_faults.__file__)
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library_root = os.path.normpath(os.path.join(folder, os.pardir))
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drivers_folder = os.path.join(folder, 'drivers')
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for root, dirs, files in os.walk(drivers_folder):
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for filename in files:
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if (filename.startswith('__') or
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filename.startswith('test') or
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not filename.endswith('.py')):
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continue
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relative_path = os.path.relpath(os.path.join(root, filename),
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library_root)
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name = os.path.splitext(relative_path)[0] # remove extension
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module_name = '.'.join(name.split(os.sep)) # convert / to .
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if module_name not in sys.modules:
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module = importutils.import_module(module_name)
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sys.modules[module_name] = module
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else:
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module = sys.modules[module_name]
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yield module
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def _list_drivers():
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modules = _import_modules_from_package()
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for module in modules:
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class_info_list = inspect.getmembers(module, inspect.isclass)
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for class_info in class_info_list:
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klazz = class_info[1]
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if not issubclass(klazz, base_driver.BaseDriver):
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continue
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if 'NAME' not in vars(klazz): # driver must have a name
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continue
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if klazz.NAME == 'base': # skip base class
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continue
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yield klazz
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def get_drivers():
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global DRIVERS
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if not DRIVERS:
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DRIVERS = {}
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for k in _list_drivers():
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driver_name = k.get_driver_name()
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if driver_name in DRIVERS:
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orig_k = DRIVERS[driver_name]
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orig_path = orig_k.__module__ + '.' + orig_k.__name__
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dup_path = k.__module__ + '.' + k.__name__
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raise error.OSFDriverWithSuchNameExists(
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'Driver "%s" already defined in %s. '
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'Found a duplicate in %s ' % (
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driver_name, orig_path, dup_path))
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DRIVERS[driver_name] = k
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return DRIVERS
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def get_driver(name):
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all_drivers = get_drivers()
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if name not in all_drivers:
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raise error.OSFDriverNotFound('Driver %s is not found' % name)
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return all_drivers[name]
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