124 lines
2.4 KiB
Go
124 lines
2.4 KiB
Go
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package ecode
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import (
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"fmt"
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"strconv"
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"sync/atomic"
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"github.com/pkg/errors"
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)
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var (
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_messages atomic.Value // NOTE: stored map[string]map[int]string
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_codes = map[int]struct{}{} // register codes.
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)
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// Register register ecode message map.
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func Register(cm map[int]string) {
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_messages.Store(cm)
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}
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// New new a ecode.Codes by int value.
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// NOTE: ecode must unique in global, the New will check repeat and then panic.
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func New(e int) Code {
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if e <= 0 {
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panic("business ecode must greater than zero")
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}
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return add(e)
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}
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func add(e int) Code {
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if _, ok := _codes[e]; ok {
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panic(fmt.Sprintf("ecode: %d already exist", e))
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}
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_codes[e] = struct{}{}
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return Int(e)
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}
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// Codes ecode error interface which has a code & message.
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type Codes interface {
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// sometimes Error return Code in string form
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// NOTE: don't use Error in monitor report even it also work for now
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Error() string
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// Code get error code.
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Code() int
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// Message get code message.
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Message() string
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//Detail get error detail,it may be nil.
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Details() []interface{}
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// Equal for compatible.
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// Deprecated: please use ecode.EqualError.
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Equal(error) bool
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}
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// A Code is an int error code spec.
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type Code int
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func (e Code) Error() string {
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return strconv.FormatInt(int64(e), 10)
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}
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// Code return error code
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func (e Code) Code() int { return int(e) }
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// Message return error message
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func (e Code) Message() string {
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if cm, ok := _messages.Load().(map[int]string); ok {
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if msg, ok := cm[e.Code()]; ok {
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return msg
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}
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}
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return e.Error()
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}
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// Details return details.
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func (e Code) Details() []interface{} { return nil }
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// Equal for compatible.
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// Deprecated: please use ecode.EqualError.
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func (e Code) Equal(err error) bool { return EqualError(e, err) }
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// Int parse code int to error.
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func Int(i int) Code { return Code(i) }
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// String parse code string to error.
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func String(e string) Code {
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if e == "" {
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return OK
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}
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// try error string
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i, err := strconv.Atoi(e)
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if err != nil {
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return ServerErr
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}
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return Code(i)
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}
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// Cause cause from error to ecode.
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func Cause(e error) Codes {
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if e == nil {
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return OK
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}
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ec, ok := errors.Cause(e).(Codes)
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if ok {
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return ec
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}
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return String(e.Error())
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}
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// Equal equal a and b by code int.
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func Equal(a, b Codes) bool {
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if a == nil {
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a = OK
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}
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if b == nil {
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b = OK
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}
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return a.Code() == b.Code()
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}
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// EqualError equal error
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func EqualError(code Codes, err error) bool {
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return Cause(err).Code() == code.Code()
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}
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