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380 lines
6.9 KiB
380 lines
6.9 KiB
//high level log wrapper, so it can output different log based on level
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package log
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import (
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"fmt"
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"io"
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"log"
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"os"
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"runtime"
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"sync"
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"time"
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)
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const (
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Ldate = log.Ldate
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Llongfile = log.Llongfile
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Lmicroseconds = log.Lmicroseconds
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Lshortfile = log.Lshortfile
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LstdFlags = log.LstdFlags
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Ltime = log.Ltime
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)
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type (
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LogLevel int
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LogType int
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)
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const (
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LOG_FATAL = LogType(0x1)
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LOG_ERROR = LogType(0x2)
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LOG_WARNING = LogType(0x4)
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LOG_INFO = LogType(0x8)
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LOG_DEBUG = LogType(0x10)
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)
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const (
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LOG_LEVEL_NONE = LogLevel(0x0)
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LOG_LEVEL_FATAL = LOG_LEVEL_NONE | LogLevel(LOG_FATAL)
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LOG_LEVEL_ERROR = LOG_LEVEL_FATAL | LogLevel(LOG_ERROR)
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LOG_LEVEL_WARN = LOG_LEVEL_ERROR | LogLevel(LOG_WARNING)
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LOG_LEVEL_INFO = LOG_LEVEL_WARN | LogLevel(LOG_INFO)
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LOG_LEVEL_DEBUG = LOG_LEVEL_INFO | LogLevel(LOG_DEBUG)
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LOG_LEVEL_ALL = LOG_LEVEL_DEBUG
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)
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const FORMAT_TIME_DAY string = "20060102"
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const FORMAT_TIME_HOUR string = "2006010215"
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var _log *logger = New()
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func init() {
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SetFlags(Ldate | Ltime | Lshortfile)
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SetHighlighting(runtime.GOOS != "windows")
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}
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func Logger() *log.Logger {
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return _log._log
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}
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func SetLevel(level LogLevel) {
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_log.SetLevel(level)
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}
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func GetLogLevel() LogLevel {
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return _log.level
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}
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func SetOutput(out io.Writer) {
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_log.SetOutput(out)
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}
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func SetOutputByName(path string) error {
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return _log.SetOutputByName(path)
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}
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func SetFlags(flags int) {
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_log._log.SetFlags(flags)
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}
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func Info(v ...interface{}) {
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_log.Info(v...)
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}
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func Infof(format string, v ...interface{}) {
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_log.Infof(format, v...)
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}
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func Debug(v ...interface{}) {
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_log.Debug(v...)
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}
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func Debugf(format string, v ...interface{}) {
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_log.Debugf(format, v...)
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}
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func Warn(v ...interface{}) {
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_log.Warning(v...)
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}
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func Warnf(format string, v ...interface{}) {
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_log.Warningf(format, v...)
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}
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func Warning(v ...interface{}) {
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_log.Warning(v...)
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}
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func Warningf(format string, v ...interface{}) {
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_log.Warningf(format, v...)
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}
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func Error(v ...interface{}) {
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_log.Error(v...)
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}
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func Errorf(format string, v ...interface{}) {
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_log.Errorf(format, v...)
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}
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func Fatal(v ...interface{}) {
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_log.Fatal(v...)
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}
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func Fatalf(format string, v ...interface{}) {
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_log.Fatalf(format, v...)
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}
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func SetLevelByString(level string) {
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_log.SetLevelByString(level)
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}
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func SetHighlighting(highlighting bool) {
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_log.SetHighlighting(highlighting)
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}
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func SetRotateByDay() {
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_log.SetRotateByDay()
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}
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func SetRotateByHour() {
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_log.SetRotateByHour()
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}
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type logger struct {
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_log *log.Logger
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level LogLevel
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highlighting bool
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dailyRolling bool
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hourRolling bool
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fileName string
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logSuffix string
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fd *os.File
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lock sync.Mutex
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}
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func (l *logger) SetHighlighting(highlighting bool) {
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l.highlighting = highlighting
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}
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func (l *logger) SetLevel(level LogLevel) {
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l.level = level
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}
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func (l *logger) SetLevelByString(level string) {
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l.level = StringToLogLevel(level)
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}
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func (l *logger) SetRotateByDay() {
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l.dailyRolling = true
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l.logSuffix = genDayTime(time.Now())
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}
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func (l *logger) SetRotateByHour() {
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l.hourRolling = true
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l.logSuffix = genHourTime(time.Now())
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}
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func (l *logger) rotate() error {
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l.lock.Lock()
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defer l.lock.Unlock()
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var suffix string
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if l.dailyRolling {
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suffix = genDayTime(time.Now())
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} else if l.hourRolling {
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suffix = genHourTime(time.Now())
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} else {
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return nil
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}
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// Notice: if suffix is not equal to l.LogSuffix, then rotate
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if suffix != l.logSuffix {
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err := l.doRotate(suffix)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (l *logger) doRotate(suffix string) error {
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// Notice: Not check error, is this ok?
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l.fd.Close()
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lastFileName := l.fileName + "." + l.logSuffix
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err := os.Rename(l.fileName, lastFileName)
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if err != nil {
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return err
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}
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err = l.SetOutputByName(l.fileName)
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if err != nil {
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return err
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}
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l.logSuffix = suffix
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return nil
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}
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func (l *logger) SetOutput(out io.Writer) {
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l._log = log.New(out, l._log.Prefix(), l._log.Flags())
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}
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func (l *logger) SetOutputByName(path string) error {
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f, err := os.OpenFile(path, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
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if err != nil {
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log.Fatal(err)
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}
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l.SetOutput(f)
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l.fileName = path
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l.fd = f
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return err
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}
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func (l *logger) log(t LogType, v ...interface{}) {
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if l.level|LogLevel(t) != l.level {
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return
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}
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err := l.rotate()
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if err != nil {
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fmt.Fprintf(os.Stderr, "%s\n", err.Error())
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return
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}
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v1 := make([]interface{}, len(v)+2)
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logStr, logColor := LogTypeToString(t)
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if l.highlighting {
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v1[0] = "\033" + logColor + "m[" + logStr + "]"
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copy(v1[1:], v)
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v1[len(v)+1] = "\033[0m"
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} else {
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v1[0] = "[" + logStr + "]"
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copy(v1[1:], v)
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v1[len(v)+1] = ""
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}
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s := fmt.Sprintln(v1...)
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l._log.Output(4, s)
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}
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func (l *logger) logf(t LogType, format string, v ...interface{}) {
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if l.level|LogLevel(t) != l.level {
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return
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}
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err := l.rotate()
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if err != nil {
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fmt.Fprintf(os.Stderr, "%s\n", err.Error())
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return
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}
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logStr, logColor := LogTypeToString(t)
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var s string
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if l.highlighting {
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s = "\033" + logColor + "m[" + logStr + "] " + fmt.Sprintf(format, v...) + "\033[0m"
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} else {
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s = "[" + logStr + "] " + fmt.Sprintf(format, v...)
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}
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l._log.Output(4, s)
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}
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func (l *logger) Fatal(v ...interface{}) {
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l.log(LOG_FATAL, v...)
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os.Exit(-1)
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}
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func (l *logger) Fatalf(format string, v ...interface{}) {
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l.logf(LOG_FATAL, format, v...)
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os.Exit(-1)
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}
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func (l *logger) Error(v ...interface{}) {
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l.log(LOG_ERROR, v...)
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}
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func (l *logger) Errorf(format string, v ...interface{}) {
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l.logf(LOG_ERROR, format, v...)
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}
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func (l *logger) Warning(v ...interface{}) {
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l.log(LOG_WARNING, v...)
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}
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func (l *logger) Warningf(format string, v ...interface{}) {
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l.logf(LOG_WARNING, format, v...)
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}
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func (l *logger) Debug(v ...interface{}) {
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l.log(LOG_DEBUG, v...)
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}
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func (l *logger) Debugf(format string, v ...interface{}) {
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l.logf(LOG_DEBUG, format, v...)
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}
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func (l *logger) Info(v ...interface{}) {
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l.log(LOG_INFO, v...)
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}
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func (l *logger) Infof(format string, v ...interface{}) {
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l.logf(LOG_INFO, format, v...)
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}
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func StringToLogLevel(level string) LogLevel {
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switch level {
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case "fatal":
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return LOG_LEVEL_FATAL
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case "error":
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return LOG_LEVEL_ERROR
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case "warn":
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return LOG_LEVEL_WARN
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case "warning":
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return LOG_LEVEL_WARN
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case "debug":
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return LOG_LEVEL_DEBUG
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case "info":
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return LOG_LEVEL_INFO
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}
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return LOG_LEVEL_ALL
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}
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func LogTypeToString(t LogType) (string, string) {
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switch t {
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case LOG_FATAL:
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return "fatal", "[0;31"
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case LOG_ERROR:
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return "error", "[0;31"
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case LOG_WARNING:
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return "warning", "[0;33"
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case LOG_DEBUG:
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return "debug", "[0;36"
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case LOG_INFO:
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return "info", "[0;37"
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}
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return "unknown", "[0;37"
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}
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func genDayTime(t time.Time) string {
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return t.Format(FORMAT_TIME_DAY)
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}
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func genHourTime(t time.Time) string {
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return t.Format(FORMAT_TIME_HOUR)
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}
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func New() *logger {
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return Newlogger(os.Stderr, "")
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}
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func Newlogger(w io.Writer, prefix string) *logger {
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return &logger{_log: log.New(w, prefix, LstdFlags), level: LOG_LEVEL_ALL, highlighting: true}
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}
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