Проект разделен на два репозитория

VM2_services/codebase/services/message-safety/app/hot_cache.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+import json
+from typing import Any
+
+from redis.asyncio import Redis
+from redis.exceptions import RedisError
+
+
+class RedisHotCache:
+    """Best-effort accelerator; callers must always retain a PostgreSQL fallback."""
+
+    def __init__(self, client: Redis | None) -> None:
+        self.client = client
+
+    async def get(self, key: str) -> dict[str, Any] | None:
+        if not self.client:
+            return None
+        try:
+            value = await self.client.get(f"han:safety:{key}")
+            return json.loads(value) if value else None
+        except (RedisError, ValueError, TypeError):
+            return None
+
+    async def put(self, key: str, value: dict[str, Any], ttl: int) -> None:
+        if not self.client:
+            return
+        try:
+            await self.client.set(
+                f"han:safety:{key}",
+                json.dumps(value, separators=(",", ":"), sort_keys=True),
+                ex=ttl,
+            )
+        except RedisError:
+            return