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Merge pull request #67 from robertlestak/master
Logger interface to enable injecting a custom log driver.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,216 @@ | ||
| package nfs | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
| ) | ||
|
|
||
| var ( | ||
| Log Logger = &DefaultLogger{} | ||
| ) | ||
|
|
||
| type LogLevel int | ||
|
|
||
| const ( | ||
| PanicLevel LogLevel = iota | ||
| FatalLevel | ||
| ErrorLevel | ||
| WarnLevel | ||
| InfoLevel | ||
| DebugLevel | ||
| TraceLevel | ||
|
|
||
| panicLevelStr string = "[PANIC] " | ||
| fatalLevelStr string = "[FATAL] " | ||
| errorLevelStr string = "[ERROR] " | ||
| warnLevelStr string = "[WARN] " | ||
| infoLevelStr string = "[INFO] " | ||
| debugLevelStr string = "[DEBUG] " | ||
| traceLevelStr string = "[TRACE] " | ||
| ) | ||
|
|
||
| type Logger interface { | ||
| SetLevel(level LogLevel) | ||
| GetLevel() LogLevel | ||
| ParseLevel(level string) (LogLevel, error) | ||
|
|
||
| Panic(args ...interface{}) | ||
| Fatal(args ...interface{}) | ||
| Error(args ...interface{}) | ||
| Warn(args ...interface{}) | ||
| Info(args ...interface{}) | ||
| Debug(args ...interface{}) | ||
| Trace(args ...interface{}) | ||
| Print(args ...interface{}) | ||
|
|
||
| Panicf(format string, args ...interface{}) | ||
| Fatalf(format string, args ...interface{}) | ||
| Errorf(format string, args ...interface{}) | ||
| Warnf(format string, args ...interface{}) | ||
| Infof(format string, args ...interface{}) | ||
| Debugf(format string, args ...interface{}) | ||
| Tracef(format string, args ...interface{}) | ||
| Printf(format string, args ...interface{}) | ||
| } | ||
|
|
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| type DefaultLogger struct { | ||
| Level LogLevel | ||
| } | ||
|
|
||
| func SetLogger(logger Logger) { | ||
| Log = logger | ||
| } | ||
|
|
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| func init() { | ||
| if os.Getenv("LOG_LEVEL") != "" { | ||
| if level, err := Log.ParseLevel(os.Getenv("LOG_LEVEL")); err == nil { | ||
| Log.SetLevel(level) | ||
| } | ||
| } else { | ||
| // set default log level to info | ||
| Log.SetLevel(InfoLevel) | ||
| } | ||
| } | ||
|
|
||
| func (l *DefaultLogger) GetLevel() LogLevel { | ||
| return l.Level | ||
| } | ||
|
|
||
| func (l *DefaultLogger) SetLevel(level LogLevel) { | ||
| l.Level = level | ||
| } | ||
|
|
||
| func (l *DefaultLogger) ParseLevel(level string) (LogLevel, error) { | ||
| switch level { | ||
| case "panic": | ||
| return PanicLevel, nil | ||
| case "fatal": | ||
| return FatalLevel, nil | ||
| case "error": | ||
| return ErrorLevel, nil | ||
| case "warn": | ||
| return WarnLevel, nil | ||
| case "info": | ||
| return InfoLevel, nil | ||
| case "debug": | ||
| return DebugLevel, nil | ||
| case "trace": | ||
| return TraceLevel, nil | ||
| } | ||
| var ll LogLevel | ||
| return ll, fmt.Errorf("invalid log level %q", level) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Panic(args ...interface{}) { | ||
| if l.Level < PanicLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{panicLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Panicf(format string, args ...interface{}) { | ||
| if l.Level < PanicLevel { | ||
| return | ||
| } | ||
| log.Printf(panicLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Fatal(args ...interface{}) { | ||
| if l.Level < FatalLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{fatalLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Fatalf(format string, args ...interface{}) { | ||
| if l.Level < FatalLevel { | ||
| return | ||
| } | ||
| log.Printf(fatalLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Error(args ...interface{}) { | ||
| if l.Level < ErrorLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{errorLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Errorf(format string, args ...interface{}) { | ||
| if l.Level < ErrorLevel { | ||
| return | ||
| } | ||
| log.Printf(errorLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Warn(args ...interface{}) { | ||
| if l.Level < WarnLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{warnLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Warnf(format string, args ...interface{}) { | ||
| if l.Level < WarnLevel { | ||
| return | ||
| } | ||
| log.Printf(warnLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Info(args ...interface{}) { | ||
| if l.Level < InfoLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{infoLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Infof(format string, args ...interface{}) { | ||
| if l.Level < InfoLevel { | ||
| return | ||
| } | ||
| log.Printf(infoLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Debug(args ...interface{}) { | ||
| if l.Level < DebugLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{debugLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Debugf(format string, args ...interface{}) { | ||
| if l.Level < DebugLevel { | ||
| return | ||
| } | ||
| log.Printf(debugLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Trace(args ...interface{}) { | ||
| if l.Level < TraceLevel { | ||
| return | ||
| } | ||
| args = append([]interface{}{traceLevelStr}, args...) | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Tracef(format string, args ...interface{}) { | ||
| if l.Level < TraceLevel { | ||
| return | ||
| } | ||
| log.Printf(traceLevelStr+format, args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Print(args ...interface{}) { | ||
| log.Print(args...) | ||
| } | ||
|
|
||
| func (l *DefaultLogger) Printf(format string, args ...interface{}) { | ||
| log.Printf(format, args...) | ||
| } |
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