完善权限缓存与监控指标

backend/app/core/permission_monitor.py

@@ -17,6 +17,9 @@ from typing import Any
 from app.core.permission_cache import get_permission_cache
 
 
+CACHE_HIT_RATE_HEALTH_MIN_ACCESSES = 10
+
+
 @dataclass
 class PermissionCheckMetrics:
     """权限检查指标"""
@@ -293,3 +296,39 @@ def set_permission_monitor(monitor: PermissionMonitor) -> None:
     """设置全局权限监控器实例（用于测试）"""
     global _permission_monitor
     _permission_monitor = monitor
+
+
+def evaluate_permission_system_health(metrics: dict[str, Any], cache_stats: dict[str, Any]) -> dict[str, Any]:
+    """根据权限系统指标评估健康状态"""
+    check_metrics = metrics["check_metrics"]
+    cache_metrics = metrics["cache_metrics"]
+
+    health_score = 100
+    issues = []
+
+    if check_metrics["error_rate"] > 1:
+        health_score -= 20
+        issues.append("权限检查错误率过高")
+
+    if (
+        cache_metrics["total_accesses"] >= CACHE_HIT_RATE_HEALTH_MIN_ACCESSES
+        and cache_metrics["hit_rate"] < 50
+    ):
+        health_score -= 10
+        issues.append("缓存命中率过低")
+
+    if check_metrics["avg_time"] > 0.01:
+        health_score -= 10
+        issues.append("权限检查响应时间过长")
+
+    if check_metrics["deny_rate"] > 50:
+        health_score -= 5
+        issues.append("权限拒绝率过高")
+
+    return {
+        "status": "healthy" if health_score >= 80 else "degraded" if health_score >= 50 else "unhealthy",
+        "health_score": max(0, health_score),
+        "issues": issues,
+        "metrics": metrics,
+        "cache_stats": cache_stats,
+    }