38 lines
989 B
Python
38 lines
989 B
Python
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from collections import OrderedDict
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import time
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import logging
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logger = logging.getLogger(__name__)
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class MessengerMessageDeduplicator:
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def __init__(self, max_size: int = 10000, ttl_seconds: int = 300):
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self._cache: OrderedDict[str, float] = OrderedDict()
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self._max_size = max_size
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self._ttl_seconds = ttl_seconds
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def is_duplicate(self, msg_id: str) -> bool:
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if not msg_id:
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return False
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self._evict_expired()
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if msg_id in self._cache:
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logger.debug(f"messenger dedupe: duplicate {msg_id}")
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return True
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self._cache[msg_id] = time.monotonic()
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if len(self._cache) > self._max_size:
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self._cache.popitem(last=False)
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return False
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def _evict_expired(self):
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now = time.monotonic()
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cutoff = now - self._ttl_seconds
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expired = [k for k, v in self._cache.items() if v < cutoff]
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for k in expired:
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del self._cache[k]
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