mi
36 lines
1.0 KiB
Python
36 lines
1.0 KiB
Python
from __future__ import annotations
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import json
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from typing import Any
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from redis.asyncio import Redis
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from redis.exceptions import RedisError
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class RedisHotCache:
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"""Best-effort accelerator; callers must always retain a PostgreSQL fallback."""
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def __init__(self, client: Redis | None) -> None:
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self.client = client
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async def get(self, key: str) -> dict[str, Any] | None:
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if not self.client:
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return None
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try:
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value = await self.client.get(f"han:safety:{key}")
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return json.loads(value) if value else None
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except (RedisError, ValueError, TypeError):
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return None
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async def put(self, key: str, value: dict[str, Any], ttl: int) -> None:
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if not self.client:
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return
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try:
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await self.client.set(
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f"han:safety:{key}",
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json.dumps(value, separators=(",", ":"), sort_keys=True),
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ex=ttl,
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)
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except RedisError:
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return
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