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logger.go
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logger.go
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package logger
import (
"log"
"strings"
)
type LogLevel int
const (
FatalLevel LogLevel = iota
ErrorLevel
InfoLevel
DebugLevel
)
type Logger struct {
level LogLevel
*log.Logger
}
var logger = Logger{FatalLevel, log.Default()}
func SetLevel(l LogLevel) {
logger.level = l
}
func ParseLevel(level string) LogLevel {
switch strings.ToLower(level) {
case "fatal":
return FatalLevel
case "error":
return ErrorLevel
case "info":
return InfoLevel
case "debug":
return DebugLevel
default:
log.Fatalf("unknown log level '%s'", level)
}
return FatalLevel
}
func SetLevelFromString(level string) {
SetLevel(ParseLevel(level))
}
func Debug(v ...interface{}) {
if logger.level >= DebugLevel {
logger.Print("DEBUG ", v)
}
}
func Debugf(format string, v ...interface{}) {
if logger.level >= DebugLevel {
logger.Printf("DEBUG "+format, v...)
}
}
func Info(v ...interface{}) {
if logger.level >= InfoLevel {
logger.Print("INFO ", v)
}
}
func Infof(format string, v ...interface{}) {
if logger.level >= InfoLevel {
logger.Printf("INFO "+format, v...)
}
}
func Error(v ...interface{}) {
if logger.level >= ErrorLevel {
logger.Print("ERROR ", v)
}
}
func Errorf(format string, v ...interface{}) {
if logger.level >= ErrorLevel {
logger.Printf("ERROR "+format, v...)
}
}
func Fatal(v ...interface{}) {
logger.Fatal("FATAL ", v)
}
func Fatalf(format string, v ...interface{}) {
logger.Fatalf("FATAL "+format, v...)
}