e66b6150cb
Remove time.sleep method reference in class and use time.sleep directly. Change-Id: Ib4c02061b29c0d584d603746a78ab50922f781c3 Closes-Bug: 1375698
64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
# Copyright 2013 Mellanox Technologies, Ltd
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#
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# 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 time
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from oslo.config import cfg
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from neutron.openstack.common import log as logging
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from neutron.plugins.mlnx.common import config # noqa
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LOG = logging.getLogger(__name__)
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class RetryDecorator(object):
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"""Retry decorator reruns a method 'retries' times if an exception occurs.
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Decorator for retrying a method if exceptionToCheck exception occurs
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If method raises exception, retries 'retries' times with increasing
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back off period between calls with 'interval' multiplier
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:param exceptionToCheck: the exception to check
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:param interval: initial delay between retries in seconds
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:param retries: number of times to try before giving up
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:raises: exceptionToCheck
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"""
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def __init__(self, exceptionToCheck,
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interval=cfg.CONF.ESWITCH.request_timeout / 1000,
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retries=cfg.CONF.ESWITCH.retries,
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backoff_rate=cfg.CONF.ESWITCH.backoff_rate):
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self.exc = exceptionToCheck
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self.interval = interval
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self.retries = retries
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self.backoff_rate = backoff_rate
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def __call__(self, original_func):
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def decorated(*args, **kwargs):
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sleep_interval = self.interval
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num_of_iter = self.retries
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while num_of_iter > 0:
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try:
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return original_func(*args, **kwargs)
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except self.exc:
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LOG.debug(_("Request timeout - call again after "
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"%s seconds"), sleep_interval)
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time.sleep(sleep_interval)
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num_of_iter -= 1
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sleep_interval *= self.backoff_rate
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return original_func(*args, **kwargs)
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return decorated
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