v1.6: Platform Gateway — Amazon/JD/Taobao/PDD/TikTok 5平台API集成 + start_provision_v2.sh

gateway/cache.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+"""In-process TTL+LRU cache for gateway queries.
+
+Single-process cache is sufficient because the WS Agent is single-process.
+Cache key: ``f"{channel}:{tenant_id}:{query_json}"``.
+"""
+
+from __future__ import annotations
+
+import threading
+import time
+from collections import OrderedDict
+from typing import Any
+
+
+class TTLCache:
+    """Tiny TTL+LRU cache.  Thread-safe."""
+
+    def __init__(self, ttl_seconds: int = 60, max_size: int = 1000) -> None:
+        self.ttl = ttl_seconds
+        self.max = max_size
+        self._data: "OrderedDict[str, tuple[float, Any]]" = OrderedDict()
+        self._lock = threading.Lock()
+
+    def get(self, key: str) -> Any | None:
+        now = time.time()
+        with self._lock:
+            entry = self._data.get(key)
+            if not entry:
+                return None
+            ts, val = entry
+            if now - ts > self.ttl:
+                self._data.pop(key, None)
+                return None
+            # LRU touch
+            self._data.move_to_end(key)
+            return val
+
+    def set(self, key: str, value: Any) -> None:
+        with self._lock:
+            self._data[key] = (time.time(), value)
+            self._data.move_to_end(key)
+            while len(self._data) > self.max:
+                self._data.popitem(last=False)
+
+    def clear(self) -> None:
+        with self._lock:
+            self._data.clear()