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api: Add delay_cap as class variable of CountingBackoff class.

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orientor 2020-03-05 04:17:35 +05:30 committed by Tim Abbott
parent 62555f97a0
commit 056963bedd
1 changed files with 4 additions and 3 deletions
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7
zulip/zulip/__init__.py
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@ -56,12 +56,13 @@ requests_json_is_function = callable(requests.Response.json)
API_VERSTRING = "v1/" API_VERSTRING = "v1/"
class CountingBackoff(object): class CountingBackoff(object):
def __init__(self, maximum_retries=10, timeout_success_equivalent=None): def __init__(self, maximum_retries=10, timeout_success_equivalent=None, delay_cap=90.0):
# type: (int, Optional[float]) -> None # type: (int, Optional[float], float) -> None
self.number_of_retries = 0 self.number_of_retries = 0
self.maximum_retries = maximum_retries self.maximum_retries = maximum_retries
self.timeout_success_equivalent = timeout_success_equivalent self.timeout_success_equivalent = timeout_success_equivalent
self.last_attempt_time = 0.0 self.last_attempt_time = 0.0
self.delay_cap = delay_cap
def keep_going(self): def keep_going(self):
# type: () -> bool # type: () -> bool
@ -94,7 +95,7 @@ class RandomExponentialBackoff(CountingBackoff):
# Exponential growth with ratio sqrt(2); compute random delay # Exponential growth with ratio sqrt(2); compute random delay
# between x and 2x where x is growing exponentially # between x and 2x where x is growing exponentially
delay_scale = int(2 ** (self.number_of_retries / 2.0 - 1)) + 1 delay_scale = int(2 ** (self.number_of_retries / 2.0 - 1)) + 1
delay = delay_scale + random.randint(1, delay_scale) delay = min(delay_scale + random.randint(1, delay_scale), delay_cap)
message = "Sleeping for %ss [max %s] before retrying." % (delay, delay_scale * 2) message = "Sleeping for %ss [max %s] before retrying." % (delay, delay_scale * 2)
try: try:
logger.warning(message) logger.warning(message)