34 lines
797 B
Python
34 lines
797 B
Python
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import time
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from collections import OrderedDict
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class AlexaDeduplicator:
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MAX_ENTRIES = 500
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TTL_SECONDS = 300
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def __init__(self):
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self._cache: OrderedDict[str, float] = OrderedDict()
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def is_duplicate(self, request_id: str) -> bool:
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if not request_id:
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return False
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now = time.time()
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while self._cache:
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oldest_key, oldest_time = next(iter(self._cache.items()))
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if now - oldest_time > self.TTL_SECONDS:
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self._cache.popitem(last=False)
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else:
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break
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if request_id in self._cache:
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return True
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self._cache[request_id] = now
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while len(self._cache) > self.MAX_ENTRIES:
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self._cache.popitem(last=False)
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return False
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