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