35 lines
778 B
Python
35 lines
778 B
Python
# standard imports
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import time
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# local imports
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from .error import BackendError
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BASE_DELAY = 0.01
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BASE_DELAY_LIMIT = 10.0
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class StoreLock:
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def __init__(self, delay=BASE_DELAY, delay_limit=BASE_DELAY_LIMIT, error=BackendError, description=None):
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self.base_delay = delay
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self.delay = delay
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self.delay_limit = delay_limit
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self.error = error
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self.description = description
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def again(self, e=None):
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if self.delay > self.delay_limit:
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err = None
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if e != None:
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err = str(e)
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else:
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err = self.description
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raise self.error(err)
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time.sleep(self.delay)
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self.delay *= 2
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def reset(self):
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self.delay = self.base_delay
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