def __init__(
self,
when=None,
max_attempts=None,
on_exception=None,
stop=None,
backoff=None,
):
if stop is None:
if max_attempts is not None:
stop = stop_mod.after_attempt(max_attempts)
else:
stop = stop_mod.NEVER
if on_exception is not None:
when = when_mod.raises(on_exception) | when
if when is None:
when = self._DEFAULT_PREDICATE
if backoff is None:
backoff = backoff_mod.jittered()
if not isinstance(backoff, backoff_mod.RetryBackoff):
backoff = backoff_mod.from_iterable_factory(backoff)
self._when = when
self._backoff = backoff
self._stop = stop
def test_jittered_backoff():
iterator = backoff.jittered()()
first = next(iterator)
assert 0 <= first <= 1
second = next(iterator)
assert 0 <= second <= 2
third = next(iterator)
assert 0 <= third <= 4
fourth = next(iterator)
assert 0 <= fourth <= 8
fifth = next(iterator)
assert 0 <= fifth <= 16
def __init__(
self,
when=None,
max_attempts=None,
on_exception=None,
stop=None,
backoff=None,
):
if stop is not None:
self._stop = stop
elif max_attempts is not None:
self._stop = stop_mod.after_attempt(max_attempts)
else:
self._stop = stop_mod.DISABLE
self._predicate = when
if on_exception is not None:
self._predicate = when_mod.raises(on_exception) | self._predicate
if self._predicate is None:
self._predicate = self._DEFAULT_PREDICATE
self._backoff = backoff_mod.jittered() if backoff is None else backoff