80a82024ea
Added decorator to check that required class variables are present. Change-Id: I6b90a7fccd4dca5675322ea2b9457c0fd0dcc658
74 lines
2.3 KiB
Python
74 lines
2.3 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 functools
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import logging
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import threading
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import traceback
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from os_faults.api import error
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def run(target, mac_addresses_list):
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tw = ThreadsWrapper(target)
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for mac_address in mac_addresses_list:
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tw.start_thread(mac_address=mac_address)
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tw.join_threads()
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if tw.errors:
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raise error.PowerManagementError(
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'There are some errors when working the driver. '
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'Please, check logs for more details.')
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class ThreadsWrapper(object):
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def __init__(self, target):
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self.target = target
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self.threads = []
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self.errors = []
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def _target(self, **kwargs):
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try:
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self.target(**kwargs)
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except Exception as exc:
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logging.error(traceback.format_exc())
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self.errors.append(exc)
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def start_thread(self, **kwargs):
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thread = threading.Thread(target=self._target, kwargs=kwargs)
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thread.start()
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self.threads.append(thread)
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def join_threads(self):
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for thread in self.threads:
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thread.join()
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def require_variables(*variables):
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"""Class method decorator to check that required variables are present"""
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def decorator(fn):
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@functools.wraps(fn)
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def wrapper(self, *args, **kawrgs):
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missing_vars = []
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for var in variables:
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if not hasattr(self, var):
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missing_vars.append(var)
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if missing_vars:
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missing_vars = ', '.join(missing_vars)
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msg = '{} required for {}.{}'.format(
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missing_vars, self.__class__.__name__, fn.__name__)
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raise NotImplementedError(msg)
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return fn(self, *args, **kawrgs)
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return wrapper
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return decorator
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