优化

backend/database/__init__.py

@@ -1,3 +1 @@
-import redis
-
-pool = redis.ConnectionPool(host='localhost', port=6379, decode_responses=True)
+"""Database connection helpers live in :mod:`database.connect`."""

backend/database/connect.py

@@ -1,11 +1,17 @@
 from functools import cache
+
 import redis
+import redis.asyncio as async_redis
 from sqlalchemy import create_engine
-from sqlalchemy.orm import Session
-from sqlalchemy.pool import NullPool
+from sqlalchemy.engine import Engine
+
 from config.main import BACKEND_DIR, config
 
-RedisPool = redis.ConnectionPool.from_url(config.REDIS_URL)
+# redis-py 8 defaults to RESP3. Keep the existing RESP2 wire contract so the
+# client remains compatible with older Redis servers and proxies.
+RedisPool = redis.ConnectionPool.from_url(config.REDIS_URL, protocol=2)
+AsyncRedisPool = async_redis.ConnectionPool.from_url(config.REDIS_URL, protocol=2)
+_db_engines: set[Engine] = set()
 
 
 def get_redis_client():
@@ -17,16 +23,26 @@ def get_redis():
         yield redis_conn
 
 
+async def get_async_redis():
+    redis_conn = async_redis.Redis(connection_pool=AsyncRedisPool)
+    try:
+        yield redis_conn
+    finally:
+        await redis_conn.aclose()
+
+
 @cache
 def get_db_engine(version='0'):
     db_path = BACKEND_DIR / 'dataFiles' / f'dcalc_{version}.db'
-    return create_engine(
-        f'sqlite:///{db_path}',
-        connect_args={'check_same_thread': False},
-        poolclass=NullPool,
-    )
+    engine = create_engine(f'sqlite:///{db_path}')
+    _db_engines.add(engine)
+    return engine
 
 
-def get_db():
-    with Session(get_db_engine()) as session:
-        yield session
+async def close_connection_pools() -> None:
+    RedisPool.close()
+    await AsyncRedisPool.aclose()
+    for engine in _db_engines:
+        engine.dispose()
+    _db_engines.clear()
+    get_db_engine.cache_clear()