v0.1
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196
internal/domains/api/entities/api_call.go
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196
internal/domains/api/entities/api_call.go
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package entities
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import (
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"crypto/rand"
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"encoding/hex"
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/google/uuid"
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"github.com/shopspring/decimal"
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"gorm.io/gorm"
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)
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// ApiCallStatus API调用状态
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const (
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ApiCallStatusPending = "pending"
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ApiCallStatusSuccess = "success"
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ApiCallStatusFailed = "failed"
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)
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// ApiCall错误类型常量定义，供各领域服务和应用层统一引用。
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// 使用时可通过 entities.ApiCallErrorInvalidAccess 方式获得，编辑器可自动补全和提示。
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// 错误类型与业务含义：
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//
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// ApiCallErrorInvalidAccess = "invalid_access" // 无效AccessId
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// ApiCallErrorFrozenAccount = "frozen_account" // 账户冻结
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// ApiCallErrorInvalidIP = "invalid_ip" // IP无效
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// ApiCallErrorArrears = "arrears" // 账户欠费
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// ApiCallErrorNotSubscribed = "not_subscribed" // 未订阅产品
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// ApiCallErrorProductNotFound = "product_not_found" // 产品不存在
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// ApiCallErrorProductDisabled = "product_disabled" // 产品已停用
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// ApiCallErrorSystem = "system_error" // 系统错误
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// ApiCallErrorDatasource = "datasource_error" // 数据源异常
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// ApiCallErrorInvalidParam = "invalid_param" // 参数不正确
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// ApiCallErrorDecryptFail = "decrypt_fail" // 解密失败
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const (
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ApiCallErrorInvalidAccess = "invalid_access" // 无效AccessId
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ApiCallErrorFrozenAccount = "frozen_account" // 账户冻结
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ApiCallErrorInvalidIP = "invalid_ip" // IP无效
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ApiCallErrorArrears = "arrears" // 账户欠费
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ApiCallErrorNotSubscribed = "not_subscribed" // 未订阅产品
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ApiCallErrorProductNotFound = "product_not_found" // 产品不存在
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ApiCallErrorProductDisabled = "product_disabled" // 产品已停用
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ApiCallErrorSystem = "system_error" // 系统错误
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ApiCallErrorDatasource = "datasource_error" // 数据源异常
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ApiCallErrorInvalidParam = "invalid_param" // 参数不正确
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ApiCallErrorDecryptFail = "decrypt_fail" // 解密失败
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ApiCallErrorQueryEmpty = "query_empty" // 查询为空
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)
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// ApiCall API调用（聚合根）
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type ApiCall struct {
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ID string `gorm:"type:varchar(64);primaryKey" json:"id"`
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AccessId string `gorm:"type:varchar(64);not null;index" json:"access_id"`
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UserId *string `gorm:"type:varchar(36);index" json:"user_id,omitempty"`
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ProductId *string `gorm:"type:varchar(64);index" json:"product_id,omitempty"`
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TransactionId string `gorm:"type:varchar(64);not null;uniqueIndex" json:"transaction_id"`
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ClientIp string `gorm:"type:varchar(64);not null;index" json:"client_ip"`
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RequestParams string `gorm:"type:text" json:"request_params"`
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ResponseData *string `gorm:"type:text" json:"response_data,omitempty"`
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Status string `gorm:"type:varchar(20);not null;default:'pending'" json:"status"`
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StartAt time.Time `gorm:"not null;index" json:"start_at"`
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EndAt *time.Time `gorm:"index" json:"end_at,omitempty"`
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Cost *decimal.Decimal `gorm:"default:0" json:"cost,omitempty"`
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ErrorType *string `gorm:"type:varchar(32)" json:"error_type,omitempty"`
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ErrorMsg *string `gorm:"type:varchar(256)" json:"error_msg,omitempty"`
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CreatedAt time.Time `gorm:"autoCreateTime" json:"created_at"`
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UpdatedAt time.Time `gorm:"autoUpdateTime" json:"updated_at"`
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}
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// NewApiCall 工厂方法
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func NewApiCall(accessId, requestParams, clientIp string) (*ApiCall, error) {
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if accessId == "" {
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return nil, errors.New("AccessId不能为空")
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}
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if requestParams == "" {
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return nil, errors.New("请求参数不能为空")
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}
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if clientIp == "" {
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return nil, errors.New("ClientIp不能为空")
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}
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return &ApiCall{
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ID: uuid.New().String(),
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AccessId: accessId,
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TransactionId: GenerateTransactionID(),
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ClientIp: clientIp,
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RequestParams: requestParams,
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Status: ApiCallStatusPending,
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StartAt: time.Now(),
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}, nil
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}
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// MarkSuccess 标记为成功
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func (a *ApiCall) MarkSuccess(responseData string, cost decimal.Decimal) error {
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// 校验除ErrorMsg和ErrorType外所有字段不能为空
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if a.ID == "" || a.AccessId == "" || a.TransactionId == "" || a.RequestParams == "" || a.Status == "" || a.StartAt.IsZero() {
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return errors.New("ApiCall字段不能为空（除ErrorMsg和ErrorType）")
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}
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// 可选字段也要有值
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if a.UserId == nil || a.ProductId == nil || responseData == "" {
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return errors.New("ApiCall标记成功时UserId、ProductId、ResponseData不能为空")
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}
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a.Status = ApiCallStatusSuccess
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a.ResponseData = &responseData
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endAt := time.Now()
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a.EndAt = &endAt
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a.Cost = &cost
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a.ErrorType = nil
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a.ErrorMsg = nil
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return nil
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}
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// MarkFailed 标记为失败
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func (a *ApiCall) MarkFailed(errorType, errorMsg string) {
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a.Status = ApiCallStatusFailed
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a.ErrorType = &errorType
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shortMsg := errorMsg
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if len(shortMsg) > 120 {
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shortMsg = shortMsg[:120]
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}
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a.ErrorMsg = &shortMsg
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endAt := time.Now()
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a.EndAt = &endAt
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}
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// Validate 校验ApiCall聚合根的业务规则
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func (a *ApiCall) Validate() error {
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if a.ID == "" {
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return errors.New("ID不能为空")
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}
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if a.AccessId == "" {
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return errors.New("AccessId不能为空")
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}
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if a.TransactionId == "" {
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return errors.New("TransactionId不能为空")
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}
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if a.RequestParams == "" {
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return errors.New("请求参数不能为空")
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}
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if a.Status != ApiCallStatusPending && a.Status != ApiCallStatusSuccess && a.Status != ApiCallStatusFailed {
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return errors.New("无效的调用状态")
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}
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return nil
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}
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// 全局计数器，用于确保TransactionID的唯一性
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var (
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transactionCounter int64
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counterMutex sync.Mutex
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)
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// GenerateTransactionID 生成16位数的交易单号
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func GenerateTransactionID() string {
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// 使用互斥锁确保计数器的线程安全
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counterMutex.Lock()
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transactionCounter++
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currentCounter := transactionCounter
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counterMutex.Unlock()
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// 获取当前时间戳（微秒精度）
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timestamp := time.Now().UnixMicro()
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// 组合时间戳和计数器，确保唯一性
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combined := fmt.Sprintf("%d%06d", timestamp, currentCounter%1000000)
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// 如果长度超出16位，截断；如果不够，填充随机字符
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if len(combined) >= 16 {
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return combined[:16]
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}
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// 如果长度不够，使用随机字节填充
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if len(combined) < 16 {
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randomBytes := make([]byte, 8)
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rand.Read(randomBytes)
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randomHex := hex.EncodeToString(randomBytes)
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combined += randomHex[:16-len(combined)]
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}
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return combined
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}
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// TableName 指定数据库表名
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func (ApiCall) TableName() string {
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return "api_calls"
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}
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// BeforeCreate GORM钩子：创建前自动生成UUID
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func (c *ApiCall) BeforeCreate(tx *gorm.DB) error {
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if c.ID == "" {
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c.ID = uuid.New().String()
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}
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return nil
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}
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