database

backend/database.py

@@ -2,65 +2,34 @@
 # -*- coding: utf-8 -*-
 """
 数据库操作模块
-使用SQLite存储工单数据 - 企业级连接池方案
+使用SQLite存储工单数据
 """
 
 import sqlite3
 import json
 from datetime import datetime, timedelta
 from typing import Dict, List, Optional
-from contextlib import contextmanager
-import threading
 
 
 class Database:
-    """数据库操作类 - 使用连接池"""
-    
-    _instance = None
-    _lock = threading.Lock()
-    
-    def __new__(cls, db_path: str = "wrench.db"):
-        """单例模式确保全局唯一数据库实例"""
-        if cls._instance is None:
-            with cls._lock:
-                if cls._instance is None:
-                    cls._instance = super().__new__(cls)
-        return cls._instance
+    """数据库操作类"""
     
     def __init__(self, db_path: str = "wrench.db"):
-        """初始化数据库连接池"""
-        if hasattr(self, '_initialized'):
-            return
+        """
+        初始化数据库
+        :param db_path: 数据库文件路径
+        """
         self.db_path = db_path
-        self._conn = None
-        self._conn_lock = threading.Lock()
-        self._initialized = True
-        self._init_connection()
         self.init_database()
     
-    def _init_connection(self):
-        """初始化持久连接"""
-        self._conn = sqlite3.connect(
-            self.db_path,
-            timeout=30.0,
-            check_same_thread=False,
-            isolation_level=None  # 自动提交模式
-        )
-        self._conn.row_factory = sqlite3.Row
-        self._conn.execute('PRAGMA journal_mode=WAL')
-        self._conn.execute('PRAGMA synchronous=NORMAL')
-        self._conn.execute('PRAGMA cache_size=-64000')
-        self._conn.execute('PRAGMA busy_timeout=30000')
-    
-    @contextmanager
     def get_connection(self):
-        """获取数据库连接的上下文管理器"""
-        with self._conn_lock:
-            try:
-                yield self._conn
-            except sqlite3.Error as e:
-                print(f"[ERROR] 数据库错误: {e}")
-                raise
+        """获取数据库连接"""
+        conn = sqlite3.connect(self.db_path, timeout=30.0, check_same_thread=False)
+        conn.row_factory = sqlite3.Row
+        conn.execute('PRAGMA journal_mode=WAL')
+        conn.execute('PRAGMA synchronous=NORMAL')
+        conn.execute('PRAGMA cache_size=-64000')
+        return conn
     
     def init_database(self):
         """初始化数据库表"""