396 lines
12 KiB
Go
396 lines
12 KiB
Go
package config
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import (
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"fmt"
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"gpt-load/internal/db"
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"gpt-load/internal/models"
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"reflect"
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"strconv"
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"strings"
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"sync"
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"github.com/sirupsen/logrus"
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"gorm.io/datatypes"
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"gorm.io/gorm/clause"
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)
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// SystemSettings 定义所有系统配置项
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// 使用结构体标签作为唯一事实来源
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type SystemSettings struct {
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// 负载均衡和重试配置
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BlacklistThreshold int `json:"blacklist_threshold" default:"1" name:"黑名单阈值" category:"失败重试" desc:"一个 Key 连续失败多少次后进入黑名单" validate:"min=0"`
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MaxRetries int `json:"max_retries" default:"3" name:"最大重试次数" category:"失败重试" desc:"单个请求使用不同 Key 的最大重试次数" validate:"min=0"`
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// 服务器超时配置 (秒)
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ServerReadTimeout int `json:"server_read_timeout" default:"120" name:"读取超时" category:"服务器配置" desc:"HTTP 服务器读取超时时间（秒）" validate:"min=1"`
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ServerWriteTimeout int `json:"server_write_timeout" default:"1800" name:"写入超时" category:"服务器配置" desc:"HTTP 服务器写入超时时间（秒）" validate:"min=1"`
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ServerIdleTimeout int `json:"server_idle_timeout" default:"120" name:"空闲超时" category:"服务器配置" desc:"HTTP 服务器空闲超时时间（秒）" validate:"min=1"`
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ServerGracefulShutdownTimeout int `json:"server_graceful_shutdown_timeout" default:"60" name:"优雅关闭超时" category:"服务器配置" desc:"服务优雅关闭的等待超时时间（秒）" validate:"min=1"`
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// 请求超时配置 (秒)
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RequestTimeout int `json:"request_timeout" default:"30" name:"请求超时" category:"请求配置" desc:"请求处理的总体超时时间（秒）" validate:"min=1"`
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ResponseTimeout int `json:"response_timeout" default:"30" name:"响应超时" category:"请求配置" desc:"TLS 握手和响应头的超时时间（秒）" validate:"min=1"`
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IdleConnTimeout int `json:"idle_conn_timeout" default:"120" name:"空闲连接超时" category:"请求配置" desc:"空闲连接的超时时间（秒）" validate:"min=1"`
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// 请求日志配置（数据库日志）
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RequestLogRetentionDays int `json:"request_log_retention_days" default:"30" name:"日志保留天数" category:"日志配置" desc:"请求日志在数据库中的保留天数" validate:"min=1"`
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}
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// GenerateSettingsMetadata 使用反射从 SystemSettings 结构体动态生成元数据
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func GenerateSettingsMetadata(s *SystemSettings) []models.SystemSettingInfo {
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var settingsInfo []models.SystemSettingInfo
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v := reflect.ValueOf(s).Elem()
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t := v.Type()
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for i := 0; i < t.NumField(); i++ {
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field := t.Field(i)
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fieldValue := v.Field(i)
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jsonTag := field.Tag.Get("json")
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if jsonTag == "" {
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continue
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}
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nameTag := field.Tag.Get("name")
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descTag := field.Tag.Get("desc")
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defaultTag := field.Tag.Get("default")
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validateTag := field.Tag.Get("validate")
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categoryTag := field.Tag.Get("category")
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var minValue *int
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if strings.HasPrefix(validateTag, "min=") {
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valStr := strings.TrimPrefix(validateTag, "min=")
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if val, err := strconv.Atoi(valStr); err == nil {
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minValue = &val
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}
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}
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info := models.SystemSettingInfo{
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Key: jsonTag,
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Name: nameTag,
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Value: fieldValue.Interface(),
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Type: field.Type.String(),
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DefaultValue: defaultTag,
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Description: descTag,
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Category: categoryTag,
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MinValue: minValue,
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}
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settingsInfo = append(settingsInfo, info)
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}
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return settingsInfo
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}
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// DefaultSystemSettings 返回默认的系统配置
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func DefaultSystemSettings() SystemSettings {
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s := SystemSettings{}
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v := reflect.ValueOf(&s).Elem()
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t := v.Type()
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for i := 0; i < t.NumField(); i++ {
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field := t.Field(i)
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defaultTag := field.Tag.Get("default")
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if defaultTag == "" {
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continue
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}
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fieldValue := v.Field(i)
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if fieldValue.CanSet() {
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switch fieldValue.Kind() {
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case reflect.Int:
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if val, err := strconv.ParseInt(defaultTag, 10, 64); err == nil {
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fieldValue.SetInt(val)
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}
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// Add cases for other types like string, bool if needed
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}
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}
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}
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return s
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}
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// SystemSettingsManager 管理系统配置
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type SystemSettingsManager struct {
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settings SystemSettings
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mu sync.RWMutex
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}
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var globalSystemSettings *SystemSettingsManager
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var once sync.Once
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// GetSystemSettingsManager 获取全局系统配置管理器单例
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func GetSystemSettingsManager() *SystemSettingsManager {
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once.Do(func() {
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globalSystemSettings = &SystemSettingsManager{}
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})
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return globalSystemSettings
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}
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// InitializeSystemSettings 初始化系统配置到数据库
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func (sm *SystemSettingsManager) InitializeSystemSettings() error {
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if db.DB == nil {
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return fmt.Errorf("database not initialized")
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}
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defaultSettings := DefaultSystemSettings()
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metadata := GenerateSettingsMetadata(&defaultSettings)
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for _, meta := range metadata {
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var existing models.SystemSetting
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err := db.DB.Where("setting_key = ?", meta.Key).First(&existing).Error
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if err != nil { // Not found
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setting := models.SystemSetting{
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SettingKey: meta.Key,
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SettingValue: fmt.Sprintf("%v", meta.DefaultValue),
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Description: meta.Description,
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}
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if err := db.DB.Create(&setting).Error; err != nil {
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logrus.Errorf("Failed to initialize setting %s: %v", setting.SettingKey, err)
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return err
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}
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logrus.Infof("Initialized system setting: %s = %s", setting.SettingKey, setting.SettingValue)
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}
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}
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// 加载配置到内存
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return sm.LoadFromDatabase()
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}
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// LoadFromDatabase 从数据库加载系统配置到内存
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func (sm *SystemSettingsManager) LoadFromDatabase() error {
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if db.DB == nil {
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return fmt.Errorf("database not initialized")
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}
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var settings []models.SystemSetting
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if err := db.DB.Find(&settings).Error; err != nil {
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return fmt.Errorf("failed to load system settings: %w", err)
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}
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settingsMap := make(map[string]string)
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for _, setting := range settings {
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settingsMap[setting.SettingKey] = setting.SettingValue
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}
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sm.mu.Lock()
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defer sm.mu.Unlock()
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// 使用默认值，然后用数据库中的值覆盖
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sm.settings = DefaultSystemSettings()
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sm.mapToStruct(settingsMap, &sm.settings)
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logrus.Info("System settings loaded from database")
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return nil
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}
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// GetSettings 获取当前系统配置
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func (sm *SystemSettingsManager) GetSettings() SystemSettings {
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sm.mu.RLock()
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defer sm.mu.RUnlock()
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return sm.settings
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}
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// UpdateSettings 更新系统配置
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func (sm *SystemSettingsManager) UpdateSettings(settingsMap map[string]string) error {
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if db.DB == nil {
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return fmt.Errorf("database not initialized")
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}
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// 验证配置项
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if err := sm.ValidateSettings(settingsMap); err != nil {
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return err
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}
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// 更新数据库
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var settingsToUpdate []models.SystemSetting
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for key, value := range settingsMap {
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settingsToUpdate = append(settingsToUpdate, models.SystemSetting{
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SettingKey: key,
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SettingValue: value,
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})
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}
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if len(settingsToUpdate) > 0 {
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if err := db.DB.Clauses(clause.OnConflict{
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Columns: []clause.Column{{Name: "setting_key"}},
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DoUpdates: clause.AssignmentColumns([]string{"setting_value", "updated_at"}),
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}).Create(&settingsToUpdate).Error; err != nil {
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return fmt.Errorf("failed to update system settings: %w", err)
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}
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}
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// 重新加载配置到内存
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return sm.LoadFromDatabase()
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}
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// GetEffectiveConfig 获取有效配置 (系统配置 + 分组覆盖)
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func (sm *SystemSettingsManager) GetEffectiveConfig(groupConfig datatypes.JSONMap) SystemSettings {
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sm.mu.RLock()
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defer sm.mu.RUnlock()
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// 从系统配置开始
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effectiveConfig := sm.settings
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v := reflect.ValueOf(&effectiveConfig).Elem()
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t := v.Type()
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// 创建一个从 json 标签到字段名的映射
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jsonToField := make(map[string]string)
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for i := 0; i < t.NumField(); i++ {
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field := t.Field(i)
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jsonTag := strings.Split(field.Tag.Get("json"), ",")[0]
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if jsonTag != "" {
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jsonToField[jsonTag] = field.Name
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}
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}
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// 应用分组配置覆盖
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for key, val := range groupConfig {
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if fieldName, ok := jsonToField[key]; ok {
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fieldValue := v.FieldByName(fieldName)
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if fieldValue.IsValid() && fieldValue.CanSet() {
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switch fieldValue.Kind() {
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case reflect.Int:
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if intVal, err := interfaceToInt(val); err == nil {
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fieldValue.SetInt(int64(intVal))
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}
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case reflect.String:
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if strVal, ok := interfaceToString(val); ok {
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fieldValue.SetString(strVal)
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}
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case reflect.Bool:
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if boolVal, ok := interfaceToBool(val); ok {
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fieldValue.SetBool(boolVal)
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}
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}
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}
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}
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}
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return effectiveConfig
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}
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// ValidateSettings 验证系统配置的有效性
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func (sm *SystemSettingsManager) ValidateSettings(settingsMap map[string]string) error {
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tempSettings := DefaultSystemSettings()
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v := reflect.ValueOf(&tempSettings).Elem()
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t := v.Type()
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jsonToField := make(map[string]reflect.StructField)
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for i := 0; i < t.NumField(); i++ {
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field := t.Field(i)
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jsonTag := field.Tag.Get("json")
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if jsonTag != "" {
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jsonToField[jsonTag] = field
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}
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}
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for key, value := range settingsMap {
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field, ok := jsonToField[key]
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if !ok {
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return fmt.Errorf("invalid setting key: %s", key)
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}
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validateTag := field.Tag.Get("validate")
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if validateTag == "" {
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continue
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}
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switch field.Type.Kind() {
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case reflect.Int:
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intVal, err := strconv.Atoi(value)
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if err != nil {
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return fmt.Errorf("invalid integer value for %s: %s", key, value)
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}
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if strings.HasPrefix(validateTag, "min=") {
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minValStr := strings.TrimPrefix(validateTag, "min=")
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minVal, _ := strconv.Atoi(minValStr)
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if intVal < minVal {
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return fmt.Errorf("value for %s (%d) is below minimum value (%d)", key, intVal, minVal)
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}
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}
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default:
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return fmt.Errorf("unsupported type for setting key validation: %s", key)
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}
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}
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return nil
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}
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// DisplayCurrentSettings 显示当前系统配置信息
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func (sm *SystemSettingsManager) DisplayCurrentSettings() {
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sm.mu.RLock()
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defer sm.mu.RUnlock()
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logrus.Info("Current System Settings:")
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logrus.Infof(" Blacklist threshold: %d", sm.settings.BlacklistThreshold)
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logrus.Infof(" Max retries: %d", sm.settings.MaxRetries)
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logrus.Infof(" Server timeouts: read=%ds, write=%ds, idle=%ds, shutdown=%ds",
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sm.settings.ServerReadTimeout, sm.settings.ServerWriteTimeout,
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sm.settings.ServerIdleTimeout, sm.settings.ServerGracefulShutdownTimeout)
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logrus.Infof(" Request timeouts: request=%ds, response=%ds, idle_conn=%ds",
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sm.settings.RequestTimeout, sm.settings.ResponseTimeout, sm.settings.IdleConnTimeout)
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logrus.Infof(" Request log retention: %d days", sm.settings.RequestLogRetentionDays)
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}
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// 辅助方法
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func (sm *SystemSettingsManager) mapToStruct(m map[string]string, s *SystemSettings) {
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v := reflect.ValueOf(s).Elem()
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t := v.Type()
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// 创建一个从 json 标签到字段名的映射
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jsonToField := make(map[string]string)
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for i := 0; i < t.NumField(); i++ {
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field := t.Field(i)
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jsonTag := strings.Split(field.Tag.Get("json"), ",")[0]
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if jsonTag != "" {
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jsonToField[jsonTag] = field.Name
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}
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}
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for key, valStr := range m {
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if fieldName, ok := jsonToField[key]; ok {
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fieldValue := v.FieldByName(fieldName)
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if fieldValue.IsValid() && fieldValue.CanSet() {
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// 假设所有字段都是 int 类型
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if intVal, err := strconv.Atoi(valStr); err == nil {
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fieldValue.SetInt(int64(intVal))
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}
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}
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}
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}
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}
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// 工具函数
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func interfaceToInt(val interface{}) (int, error) {
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switch v := val.(type) {
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case int:
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return v, nil
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case float64:
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return int(v), nil
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case string:
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return strconv.Atoi(v)
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default:
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return 0, fmt.Errorf("cannot convert to int: %v", val)
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}
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}
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func interfaceToString(val interface{}) (string, bool) {
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s, ok := val.(string)
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return s, ok
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}
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func interfaceToBool(val interface{}) (bool, bool) {
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switch v := val.(type) {
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case bool:
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return v, true
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case string:
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lowerV := strings.ToLower(v)
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if lowerV == "true" || lowerV == "1" || lowerV == "on" {
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return true, true
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}
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if lowerV == "false" || lowerV == "0" || lowerV == "off" {
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return false, true
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}
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}
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return false, false
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}
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