SWAMPy

✎ CARVE FLESH

EDITING: backoff.py

import random
from abc import ABC, abstractmethod

class AbstractBackoff(ABC):
    """Backoff interface"""

def reset(self):
        """
        Reset internal state before an operation.
        `reset` is called once at the beginning of
        every call to `Retry.call_with_retry`
        """
        pass

@abstractmethod
    def compute(self, failures):
        """Compute backoff in seconds upon failure"""
        pass

class ConstantBackoff(AbstractBackoff):
    """Constant backoff upon failure"""

def __init__(self, backoff):
        """`backoff`: backoff time in seconds"""
        self._backoff = backoff

def compute(self, failures):
        return self._backoff

class NoBackoff(ConstantBackoff):
    """No backoff upon failure"""

def __init__(self):
        super().__init__(0)

class ExponentialBackoff(AbstractBackoff):
    """Exponential backoff upon failure"""

def __init__(self, cap, base):
        """
        `cap`: maximum backoff time in seconds
        `base`: base backoff time in seconds
        """
        self._cap = cap
        self._base = base

def compute(self, failures):
        return min(self._cap, self._base * 2**failures)

class FullJitterBackoff(AbstractBackoff):
    """Full jitter backoff upon failure"""

def __init__(self, cap, base):
        """
        `cap`: maximum backoff time in seconds
        `base`: base backoff time in seconds
        """
        self._cap = cap
        self._base = base

def compute(self, failures):
        return random.uniform(0, min(self._cap, self._base * 2**failures))

class EqualJitterBackoff(AbstractBackoff):
    """Equal jitter backoff upon failure"""

def __init__(self, cap, base):
        """
        `cap`: maximum backoff time in seconds
        `base`: base backoff time in seconds
        """
        self._cap = cap
        self._base = base

def compute(self, failures):
        temp = min(self._cap, self._base * 2**failures) / 2
        return temp + random.uniform(0, temp)

class DecorrelatedJitterBackoff(AbstractBackoff):
    """Decorrelated jitter backoff upon failure"""

def __init__(self, cap, base):
        """
        `cap`: maximum backoff time in seconds
        `base`: base backoff time in seconds
        """
        self._cap = cap
        self._base = base
        self._previous_backoff = 0

def reset(self):
        self._previous_backoff = 0

def compute(self, failures):
        max_backoff = max(self._base, self._previous_backoff * 3)
        temp = random.uniform(self._base, max_backoff)
        self._previous_backoff = min(self._cap, temp)
        return self._previous_backoff

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 __pycache__/	DIR	—	2026-03-10 17:36
📁 asyncio/	DIR	—	2026-03-10 17:36
📁 commands/	DIR	—	2026-03-10 17:36
📄 __init__.py	PY	1.7 KB	2022-06-27 12:47	EDIT
📄 backoff.py	PY	2.6 KB	2022-06-27 12:47	EDIT
📄 client.py	PY	74.6 KB	2022-06-27 12:47	EDIT
📄 cluster.py	PY	83.5 KB	2022-06-27 12:47	EDIT
📄 compat.py	PY	242 B	2022-06-27 12:47	EDIT
📄 connection.py	PY	59.9 KB	2022-06-27 12:47	EDIT
📄 crc.py	PY	729 B	2022-06-27 12:47	EDIT
📄 exceptions.py	PY	4.5 KB	2022-06-27 12:47	EDIT
📄 lock.py	PY	11.3 KB	2022-06-27 12:47	EDIT
📄 ocsp.py	PY	11.2 KB	2022-06-27 12:47	EDIT
📄 retry.py	PY	1.8 KB	2022-06-27 12:47	EDIT
📄 sentinel.py	PY	12.3 KB	2022-06-27 12:47	EDIT
📄 typing.py	PY	2.1 KB	2022-06-27 12:47	EDIT
📄 utils.py	PY	1.6 KB	2022-06-27 12:47	EDIT