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fix(sweeper): key threshold cache by TTLPolicy value instead of id() #11

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Merged
35C4n0r merged 1 commit into from
May 24, 2026
Merged

fix(sweeper): key threshold cache by TTLPolicy value instead of id() #11

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10 changes: 4 additions & 6 deletions src/langgraph_ephemeral_checkpointer/sweeper.py
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Original file line number Diff line number Diff line change
Expand Up @@ -262,16 +262,14 @@ def _plan(
dry_ids: list[str] = []
to_delete: list[_DeleteItem] = []

# Threshold UUIDs are computed once per distinct policy object, not once per thread.
_cache: dict[int, tuple[str | None, str | None]] = {}
_cache: dict[TTLPolicy, tuple[str | None, str | None]] = {}

def _thresholds(policy: TTLPolicy) -> tuple[str | None, str | None]:
pid = id(policy)
if pid not in _cache:
if policy not in _cache:
idle = unix_to_uuid6(now - policy.idle_ttl_seconds) if policy.idle_ttl_seconds is not None else None
age = unix_to_uuid6(now - policy.hard_age_ttl_seconds) if policy.hard_age_ttl_seconds is not None else None
_cache[pid] = (idle, age)
return _cache[pid]
_cache[policy] = (idle, age)
return _cache[policy]

for tid, ts in timestamps.items():
policy = self._resolve_policy(tid)
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