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564b5ea | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | """Short-term in-memory store with TTL."""
import time
import logging
from typing import Any, Dict
logger = logging.getLogger("kapo.memory.short_term")
class ShortTermMemory:
def __init__(self, ttl_sec: int = 1800, max_items: int = 500):
self.ttl_sec = ttl_sec
self.max_items = max_items
self._store: Dict[str, Any] = {}
self._ts: Dict[str, float] = {}
def _cleanup(self):
try:
now = time.time()
expired = [k for k, t in self._ts.items() if now - t > self.ttl_sec]
for k in expired:
self._store.pop(k, None)
self._ts.pop(k, None)
if len(self._store) > self.max_items:
for k in list(self._store.keys())[: len(self._store) - self.max_items]:
self._store.pop(k, None)
self._ts.pop(k, None)
except Exception:
logger.exception("Cleanup failed")
def set(self, key: str, value: Any):
self._store[key] = value
self._ts[key] = time.time()
self._cleanup()
def get(self, key: str):
self._cleanup()
return self._store.get(key)
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