修復 too many connection 問題

lib/database-service-smart.ts

@@ -0,0 +1,89 @@
+// =====================================================
+// 智能資料庫服務範例
+// =====================================================
+
+import { smartPool } from './smart-connection-pool';
+
+// 這是一個範例，展示如何使用智能連線池
+// 你可以將現有的資料庫服務改為使用這個方式
+
+export class SmartDatabaseService {
+  // 智能查詢範例
+  static async getUserById(userId: string, requestId?: string) {
+    return await smartPool.executeQueryOne(
+      'SELECT * FROM users WHERE id = ?',
+      [userId],
+      { 
+        userId, 
+        sessionId: requestId,
+        requestId: `getUserById_${Date.now()}`
+      }
+    );
+  }
+
+  // 智能插入範例
+  static async createUser(userData: any, requestId?: string) {
+    return await smartPool.executeInsert(
+      'INSERT INTO users (name, email, department) VALUES (?, ?, ?)',
+      [userData.name, userData.email, userData.department],
+      { 
+        userId: userData.id,
+        sessionId: requestId,
+        requestId: `createUser_${Date.now()}`
+      }
+    );
+  }
+
+  // 智能更新範例
+  static async updateUser(userId: string, userData: any, requestId?: string) {
+    return await smartPool.executeUpdate(
+      'UPDATE users SET name = ?, email = ?, department = ? WHERE id = ?',
+      [userData.name, userData.email, userData.department, userId],
+      { 
+        userId,
+        sessionId: requestId,
+        requestId: `updateUser_${Date.now()}`
+      }
+    );
+  }
+
+  // 智能刪除範例
+  static async deleteUser(userId: string, requestId?: string) {
+    return await smartPool.executeDelete(
+      'DELETE FROM users WHERE id = ?',
+      [userId],
+      { 
+        userId,
+        sessionId: requestId,
+        requestId: `deleteUser_${Date.now()}`
+      }
+    );
+  }
+
+  // 獲取連線統計
+  static getConnectionStats() {
+    return smartPool.getConnectionStats();
+  }
+
+  // 強制清理連線
+  static forceCleanup() {
+    return smartPool.forceCleanup();
+  }
+}
+
+// 使用範例：
+/*
+// 在 API 路由中使用
+export async function GET(request: NextRequest) {
+  const { searchParams } = new URL(request.url);
+  const userId = searchParams.get('userId');
+  const requestId = request.headers.get('x-request-id') || 'unknown';
+  
+  try {
+    const user = await SmartDatabaseService.getUserById(userId, requestId);
+    return NextResponse.json({ success: true, data: user });
+  } catch (error) {
+    return NextResponse.json({ success: false, error: error.message }, { status: 500 });
+  }
+}
+*/