proxy-go/internal/constants/constants.go

package constants

import (
	"proxy-go/internal/config"
	"time"
)

var (
	// 缓存相关
	CacheTTL     = 5 * time.Minute // 缓存过期时间
	MaxCacheSize = 10000           // 最大缓存大小

	// 数据库相关
	CleanupInterval = 24 * time.Hour      // 清理间隔
	DataRetention   = 90 * 24 * time.Hour // 数据保留时间
	BatchSize       = 100                 // 批量写入大小

	// 指标相关
	MetricsInterval = 5 * time.Minute // 指标收集间隔
	MaxPathsStored  = 1000            // 最大存储路径数
	MaxRecentLogs   = 1000            // 最大最近日志数

	// 监控告警相关
	AlertWindowSize           = 12               // 监控窗口数量
	AlertWindowInterval       = 5 * time.Minute  // 每个窗口时间长度
	AlertDedupeWindow         = 15 * time.Minute // 告警去重时间窗口
	MinRequestsForAlert int64 = 10               // 触发告警的最小请求数
	ErrorRateThreshold        = 0.5              // 错误率告警阈值 (50%)

	// 延迟告警阈值
	SmallFileSize  int64 = 1 * MB   // 小文件阈值
	MediumFileSize int64 = 10 * MB  // 中等文件阈值
	LargeFileSize  int64 = 100 * MB // 大文件阈值

	SmallFileLatency  = 3 * time.Second   // 小文件最大延迟
	MediumFileLatency = 8 * time.Second   // 中等文件最大延迟
	LargeFileLatency  = 30 * time.Second  // 大文件最大延迟
	HugeFileLatency   = 300 * time.Second // 超大文件最大延迟 (5分钟)

	// 单位常量
	KB int64 = 1024
	MB int64 = 1024 * KB
)

// UpdateFromConfig 从配置文件更新常量
func UpdateFromConfig(cfg *config.Config) {
	// 告警配置
	if cfg.Metrics.Alert.WindowSize > 0 {
		AlertWindowSize = cfg.Metrics.Alert.WindowSize
	}
	if cfg.Metrics.Alert.WindowInterval > 0 {
		AlertWindowInterval = cfg.Metrics.Alert.WindowInterval
	}
	if cfg.Metrics.Alert.DedupeWindow > 0 {
		AlertDedupeWindow = cfg.Metrics.Alert.DedupeWindow
	}
	if cfg.Metrics.Alert.MinRequests > 0 {
		MinRequestsForAlert = cfg.Metrics.Alert.MinRequests
	}
	if cfg.Metrics.Alert.ErrorRate > 0 {
		ErrorRateThreshold = cfg.Metrics.Alert.ErrorRate
	}

	// 延迟告警配置
	if cfg.Metrics.Latency.SmallFileSize > 0 {
		SmallFileSize = cfg.Metrics.Latency.SmallFileSize
	}
	if cfg.Metrics.Latency.MediumFileSize > 0 {
		MediumFileSize = cfg.Metrics.Latency.MediumFileSize
	}
	if cfg.Metrics.Latency.LargeFileSize > 0 {
		LargeFileSize = cfg.Metrics.Latency.LargeFileSize
	}
	if cfg.Metrics.Latency.SmallLatency > 0 {
		SmallFileLatency = cfg.Metrics.Latency.SmallLatency
	}
	if cfg.Metrics.Latency.MediumLatency > 0 {
		MediumFileLatency = cfg.Metrics.Latency.MediumLatency
	}
	if cfg.Metrics.Latency.LargeLatency > 0 {
		LargeFileLatency = cfg.Metrics.Latency.LargeLatency
	}
	if cfg.Metrics.Latency.HugeLatency > 0 {
		HugeFileLatency = cfg.Metrics.Latency.HugeLatency
	}
}