21 lines
686 B
Python
21 lines
686 B
Python
"""指数退避策略"""
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import random
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class BackoffPolicy:
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"""提供带随机抖动的指数退避，用于渠道重连间隔计算。"""
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def __init__(self, base_ms: int = 1000, max_ms: int = 30000, jitter_ms: int = 1000):
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self.base_ms = base_ms
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self.max_ms = max_ms
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self.jitter_ms = jitter_ms
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def compute(self, attempts: int) -> int:
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"""根据已尝试次数返回毫秒级延迟。"""
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attempts = max(0, attempts)
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capped_attempts = min(attempts, 30)
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delay = min(self.base_ms * (2**capped_attempts), self.max_ms)
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jitter = random.randint(0, self.jitter_ms)
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return min(delay + jitter, self.max_ms)
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