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level.go
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level.go
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package log
import (
"errors"
"strconv"
)
// Level 日志级别
type Level uint8
// 所有日志级别常量,级别越高,日志越重要,级别越低,日志越详细
const (
AllLevel Level = iota // 等同于 TraceLevel
TraceLevel
DebugLevel // 默认日志级别,方便开发
InfoLevel
WarnLevel
ErrorLevel
PanicLevel // panic 打印错误栈,但是可以 recover
FatalLevel // fatal 表明严重错误,程序直接退出,慎用
// 提供这个级别日志,方便在无论何种情况下,都打印必要信息,比如服务启动信息
PrintLevel
StackLevel // 打印堆栈信息
)
// Labels 每个级别对应的标签
var Labels = [...]string{"all", "trace", "debug", "info", "warn", "error", "panic", "fatal", "print", "stack"}
// String 返回日志标签
func (v Level) String() string {
return Labels[v]
}
// ValueOfLevel 字符串转换成 Level, "debug" => DebugLevel
func ValueOfLevel(vstr string) (v Level, err error) {
for i, l := 0, len(Labels); i < l; i++ {
if vstr == Labels[i] {
return Level(i), nil
}
}
return InfoLevel, errors.New("level " + vstr + " not exist")
}
// MarshalJSON 便于 JSON 解析
func (v *Level) MarshalJSON() ([]byte, error) {
return []byte(strconv.Quote(v.String())), nil
}
// UnmarshalJSON 便于 JSON 解析
func (v *Level) UnmarshalJSON(b []byte) error {
vstr, err := strconv.Unquote(string(b))
if err != nil {
return err
}
x, err := ValueOfLevel(vstr)
if err != nil {
return err
}
*v = x
return nil
}
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