修改服务启动逻辑

back/services/metrics.ts

@@ -0,0 +1,92 @@
+import { performance } from 'perf_hooks';
+import Logger from '../loaders/logger';
+
+interface Metric {
+  name: string;
+  value: number;
+  timestamp: number;
+  tags?: Record<string, string>;
+}
+
+class MetricsService {
+  private metrics: Metric[] = [];
+  private static instance: MetricsService;
+
+  private constructor() {
+    // 定期清理旧数据
+    setInterval(() => {
+      const oneHourAgo = Date.now() - 3600000;
+      this.metrics = this.metrics.filter(m => m.timestamp > oneHourAgo);
+    }, 60000);
+  }
+
+  static getInstance(): MetricsService {
+    if (!MetricsService.instance) {
+      MetricsService.instance = new MetricsService();
+    }
+    return MetricsService.instance;
+  }
+
+  record(name: string, value: number, tags?: Record<string, string>) {
+    this.metrics.push({
+      name,
+      value,
+      timestamp: Date.now(),
+      tags,
+    });
+  }
+
+  measure(name: string, fn: () => void, tags?: Record<string, string>) {
+    const start = performance.now();
+    try {
+      fn();
+    } finally {
+      const duration = performance.now() - start;
+      this.record(name, duration, tags);
+    }
+  }
+
+  async measureAsync(name: string, fn: () => Promise<void>, tags?: Record<string, string>) {
+    const start = performance.now();
+    try {
+      await fn();
+    } finally {
+      const duration = performance.now() - start;
+      this.record(name, duration, tags);
+    }
+  }
+
+  getMetrics(name?: string, tags?: Record<string, string>) {
+    let filtered = this.metrics;
+    
+    if (name) {
+      filtered = filtered.filter(m => m.name === name);
+    }
+    
+    if (tags) {
+      filtered = filtered.filter(m => {
+        if (!m.tags) return false;
+        return Object.entries(tags).every(([key, value]) => m.tags![key] === value);
+      });
+    }
+
+    return {
+      count: filtered.length,
+      average: filtered.reduce((acc, curr) => acc + curr.value, 0) / filtered.length,
+      min: Math.min(...filtered.map(m => m.value)),
+      max: Math.max(...filtered.map(m => m.value)),
+      metrics: filtered,
+    };
+  }
+
+  report() {
+    const report = {
+      timestamp: Date.now(),
+      metrics: this.getMetrics(),
+    };
+    Logger.info('性能指标报告:', report);
+    return report;
+  }
+}
+
+export const metricsService = MetricsService.getInstance();