修復 too many connection 問題

app/admin/connection-monitor/page.tsx

@@ -0,0 +1,371 @@
+'use client';
+
+import React, { useState, useEffect } from 'react';
+import { Button } from '@/components/ui/button';
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { Badge } from '@/components/ui/badge';
+import { Alert, AlertDescription } from '@/components/ui/alert';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { Loader2, Database, Trash2, Settings, Activity, Clock, Users } from 'lucide-react';
+
+interface ConnectionStats {
+  totalConnections: number;
+  idleConnections: number;
+  oldConnections: number;
+  maxIdleTime: number;
+  maxConnectionAge: number;
+  connections: Array<{
+    createdAt: string;
+    lastUsed: string;
+    idleTime: number;
+    age: number;
+    userId?: string;
+    sessionId?: string;
+  }>;
+}
+
+export default function ConnectionMonitorPage() {
+  const [stats, setStats] = useState<ConnectionStats | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [message, setMessage] = useState<string>('');
+  const [error, setError] = useState<string>('');
+  const [maxIdleTime, setMaxIdleTime] = useState<number>(300000); // 5分鐘
+  const [maxConnectionAge, setMaxConnectionAge] = useState<number>(1800000); // 30分鐘
+
+  // 獲取連線統計
+  const fetchStats = async () => {
+    try {
+      setLoading(true);
+      const response = await fetch('/api/connection-monitor?action=stats');
+      const data = await response.json();
+      
+      if (data.success) {
+        setStats(data.data);
+        setMessage('統計更新成功');
+        setError('');
+      } else {
+        setError(data.error || '獲取統計失敗');
+      }
+    } catch (err) {
+      setError('網路錯誤: ' + (err instanceof Error ? err.message : '未知錯誤'));
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  // 強制清理連線
+  const forceCleanup = async () => {
+    if (!confirm('確定要強制清理所有連線嗎？這可能會影響正在進行的操作！')) {
+      return;
+    }
+
+    try {
+      setLoading(true);
+      const response = await fetch('/api/connection-monitor?action=cleanup');
+      const data = await response.json();
+      
+      if (data.success) {
+        setMessage('連線清理完成');
+        setError('');
+        await fetchStats(); // 重新獲取統計
+      } else {
+        setError(data.error || '清理失敗');
+      }
+    } catch (err) {
+      setError('清理錯誤: ' + (err instanceof Error ? err.message : '未知錯誤'));
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  // 測試智能連線
+  const testConnection = async () => {
+    try {
+      setLoading(true);
+      const response = await fetch('/api/connection-monitor?action=test');
+      const data = await response.json();
+      
+      if (data.success) {
+        setMessage('智能連線測試成功');
+        setError('');
+        await fetchStats(); // 重新獲取統計
+      } else {
+        setError(data.error || '測試失敗');
+      }
+    } catch (err) {
+      setError('測試錯誤: ' + (err instanceof Error ? err.message : '未知錯誤'));
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  // 更新清理配置
+  const updateConfig = async () => {
+    try {
+      setLoading(true);
+      const response = await fetch('/api/connection-monitor', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          action: 'config',
+          maxIdleTime,
+          maxConnectionAge
+        }),
+      });
+      
+      const data = await response.json();
+      
+      if (data.success) {
+        setMessage('清理配置更新成功');
+        setError('');
+        await fetchStats(); // 重新獲取統計
+      } else {
+        setError(data.error || '配置更新失敗');
+      }
+    } catch (err) {
+      setError('配置更新錯誤: ' + (err instanceof Error ? err.message : '未知錯誤'));
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  // 格式化時間
+  const formatTime = (ms: number) => {
+    const seconds = Math.floor(ms / 1000);
+    const minutes = Math.floor(seconds / 60);
+    const hours = Math.floor(minutes / 60);
+    
+    if (hours > 0) return `${hours}h ${minutes % 60}m`;
+    if (minutes > 0) return `${minutes}m ${seconds % 60}s`;
+    return `${seconds}s`;
+  };
+
+  // 組件載入時獲取統計
+  useEffect(() => {
+    fetchStats();
+    
+    // 每30秒自動更新統計
+    const interval = setInterval(fetchStats, 30000);
+    return () => clearInterval(interval);
+  }, []);
+
+  return (
+    <div className="container mx-auto p-6 space-y-6">
+      <div className="flex items-center justify-between">
+        <div>
+          <h1 className="text-3xl font-bold">連線監控管理</h1>
+          <p className="text-muted-foreground">
+            監控和管理資料庫連線的生命週期
+          </p>
+        </div>
+        <Button 
+          onClick={fetchStats} 
+          disabled={loading}
+          variant="outline"
+        >
+          {loading ? <Loader2 className="h-4 w-4 animate-spin" /> : <Activity className="h-4 w-4" />}
+          重新整理
+        </Button>
+      </div>
+
+      {/* 統計概覽 */}
+      {stats && (
+        <div className="grid grid-cols-1 md:grid-cols-4 gap-4">
+          <Card>
+            <CardContent className="p-6">
+              <div className="flex items-center gap-2">
+                <Database className="h-5 w-5 text-blue-500" />
+                <div>
+                  <p className="text-sm font-medium text-muted-foreground">總連線數</p>
+                  <p className="text-2xl font-bold">{stats.totalConnections}</p>
+                </div>
+              </div>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardContent className="p-6">
+              <div className="flex items-center gap-2">
+                <Clock className="h-5 w-5 text-yellow-500" />
+                <div>
+                  <p className="text-sm font-medium text-muted-foreground">空閒連線</p>
+                  <p className="text-2xl font-bold">{stats.idleConnections}</p>
+                </div>
+              </div>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardContent className="p-6">
+              <div className="flex items-center gap-2">
+                <Users className="h-5 w-5 text-red-500" />
+                <div>
+                  <p className="text-sm font-medium text-muted-foreground">舊連線</p>
+                  <p className="text-2xl font-bold">{stats.oldConnections}</p>
+                </div>
+              </div>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardContent className="p-6">
+              <div className="flex items-center gap-2">
+                <Activity className="h-5 w-5 text-green-500" />
+                <div>
+                  <p className="text-sm font-medium text-muted-foreground">健康狀態</p>
+                  <p className="text-2xl font-bold">
+                    {stats.idleConnections + stats.oldConnections === 0 ? '良好' : '需清理'}
+                  </p>
+                </div>
+              </div>
+            </CardContent>
+          </Card>
+        </div>
+      )}
+
+      {/* 操作按鈕 */}
+      <Card>
+        <CardHeader>
+          <CardTitle className="flex items-center gap-2">
+            <Settings className="h-5 w-5" />
+            連線管理
+          </CardTitle>
+          <CardDescription>
+            管理和清理資料庫連線
+          </CardDescription>
+        </CardHeader>
+        <CardContent className="space-y-4">
+          <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+            <Button 
+              onClick={testConnection} 
+              disabled={loading}
+              variant="outline"
+              className="w-full"
+            >
+              {loading ? <Loader2 className="h-4 w-4 animate-spin" /> : <Database className="h-4 w-4" />}
+              測試智能連線
+            </Button>
+            
+            <Button 
+              onClick={forceCleanup} 
+              disabled={loading}
+              variant="destructive"
+              className="w-full"
+            >
+              {loading ? <Loader2 className="h-4 w-4 animate-spin" /> : <Trash2 className="h-4 w-4" />}
+              強制清理連線
+            </Button>
+            
+            <Button 
+              onClick={updateConfig} 
+              disabled={loading}
+              variant="secondary"
+              className="w-full"
+            >
+              {loading ? <Loader2 className="h-4 w-4 animate-spin" /> : <Settings className="h-4 w-4" />}
+              更新配置
+            </Button>
+          </div>
+
+          {/* 配置設定 */}
+          <div className="grid grid-cols-1 md:grid-cols-2 gap-4 pt-4 border-t">
+            <div className="space-y-2">
+              <Label htmlFor="maxIdleTime">最大空閒時間 (毫秒)</Label>
+              <Input
+                id="maxIdleTime"
+                type="number"
+                value={maxIdleTime}
+                onChange={(e) => setMaxIdleTime(Number(e.target.value))}
+                placeholder="300000 (5分鐘)"
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="maxConnectionAge">最大連線年齡 (毫秒)</Label>
+              <Input
+                id="maxConnectionAge"
+                type="number"
+                value={maxConnectionAge}
+                onChange={(e) => setMaxConnectionAge(Number(e.target.value))}
+                placeholder="1800000 (30分鐘)"
+              />
+            </div>
+          </div>
+        </CardContent>
+      </Card>
+
+      {/* 連線詳情 */}
+      {stats && stats.connections.length > 0 && (
+        <Card>
+          <CardHeader>
+            <CardTitle>連線詳情</CardTitle>
+            <CardDescription>
+              當前活躍的資料庫連線列表
+            </CardDescription>
+          </CardHeader>
+          <CardContent>
+            <div className="space-y-2">
+              {stats.connections.map((conn, index) => (
+                <div key={index} className="flex items-center justify-between p-3 border rounded-lg">
+                  <div className="flex items-center gap-4">
+                    <Badge variant="outline">#{index + 1}</Badge>
+                    <div>
+                      <p className="text-sm font-medium">
+                        創建時間: {new Date(conn.createdAt).toLocaleString()}
+                      </p>
+                      <p className="text-sm text-muted-foreground">
+                        最後使用: {new Date(conn.lastUsed).toLocaleString()}
+                      </p>
+                    </div>
+                  </div>
+                  <div className="flex items-center gap-2">
+                    <Badge variant={conn.idleTime > stats.maxIdleTime ? "destructive" : "default"}>
+                      空閒: {formatTime(conn.idleTime)}
+                    </Badge>
+                    <Badge variant={conn.age > stats.maxConnectionAge ? "destructive" : "default"}>
+                      年齡: {formatTime(conn.age)}
+                    </Badge>
+                    {conn.userId && (
+                      <Badge variant="secondary">用戶: {conn.userId}</Badge>
+                    )}
+                  </div>
+                </div>
+              ))}
+            </div>
+          </CardContent>
+        </Card>
+      )}
+
+      {/* 訊息顯示 */}
+      {message && (
+        <Alert>
+          <Activity className="h-4 w-4" />
+          <AlertDescription>{message}</AlertDescription>
+        </Alert>
+      )}
+
+      {error && (
+        <Alert variant="destructive">
+          <Database className="h-4 w-4" />
+          <AlertDescription>{error}</AlertDescription>
+        </Alert>
+      )}
+
+      {/* 說明資訊 */}
+      <Card>
+        <CardHeader>
+          <CardTitle>智能連線管理說明</CardTitle>
+        </CardHeader>
+        <CardContent className="space-y-2 text-sm text-muted-foreground">
+          <p>• <strong>自動清理:</strong> 系統每30秒自動檢查並清理空閒或過期的連線</p>
+          <p>• <strong>智能追蹤:</strong> 追蹤每個連線的創建時間、最後使用時間和用戶信息</p>
+          <p>• <strong>即時監控:</strong> 實時顯示連線狀態，幫助識別連線洩漏問題</p>
+          <p>• <strong>自動釋放:</strong> 查詢完成後自動釋放連線，避免連線累積</p>
+          <p>• <strong>用戶關閉網頁:</strong> 空閒連線會在設定的時間後自動清理</p>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}