forked from name5566/leaf
/
log.go
180 lines (150 loc) · 3.55 KB
/
log.go
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package log
import (
"errors"
"fmt"
"log"
"os"
"path"
"runtime"
"strings"
"time"
)
var (
CloseSvr func()
)
// levels
const (
debugLevel = 0
releaseLevel = 1
errorLevel = 2
fatalLevel = 3
)
const (
printDebugLevel = "[debug ] "
printReleaseLevel = "[release] "
printErrorLevel = "[error ] "
printFatalLevel = "[fatal ] "
)
type Logger struct {
level int
baseLogger *log.Logger
baseFile *os.File
}
func New(strLevel string, pathname string, flag int) (*Logger, error) {
// level
var level int
switch strings.ToLower(strLevel) {
case "debug":
level = debugLevel
case "release":
level = releaseLevel
case "error":
level = errorLevel
case "fatal":
level = fatalLevel
default:
return nil, errors.New("unknown level: " + strLevel)
}
// logger
var baseLogger *log.Logger
var baseFile *os.File
if pathname != "" {
now := time.Now()
filename := fmt.Sprintf("%d%02d%02d_%02d_%02d_%02d.log",
now.Year(),
now.Month(),
now.Day(),
now.Hour(),
now.Minute(),
now.Second())
file, err := os.Create(path.Join(pathname, filename))
if err != nil {
return nil, err
}
baseLogger = log.New(file, "", flag)
baseFile = file
} else {
baseLogger = log.New(os.Stdout, "", flag)
}
// new
logger := new(Logger)
logger.level = level
logger.baseLogger = baseLogger
logger.baseFile = baseFile
return logger, nil
}
// It's dangerous to call the method on logging
func (logger *Logger) Close() {
logger.Debug("begin close logger")
if logger.baseFile != nil {
logger.baseFile.Close()
}
logger.baseLogger = nil
logger.baseFile = nil
}
func (logger *Logger) doPrintf(level int, printLevel string, format string, a ...interface{}) {
if level < logger.level {
return
}
if logger.baseLogger == nil {
log.Println("logger closed .......................")
return
}
format = printLevel + format
logger.baseLogger.Output(3, fmt.Sprintf(format, a...))
if level == fatalLevel {
if CloseSvr != nil {
go func() {
time.AfterFunc(8*time.Second, func() { os.Exit(-1) })
}()
Debug("afert fatal, begin shuwt server ............................")
CloseSvr()
os.Exit(-1)
} else {
Debug("afert fatal, begin shuwt server ............................")
os.Exit(-1)
}
}
}
func (logger *Logger) Debug(format string, a ...interface{}) {
logger.doPrintf(debugLevel, printDebugLevel, format, a...)
}
func (logger *Logger) Release(format string, a ...interface{}) {
logger.doPrintf(releaseLevel, printReleaseLevel, format, a...)
}
func (logger *Logger) Error(format string, a ...interface{}) {
logger.doPrintf(errorLevel, printErrorLevel, format, a...)
}
func (logger *Logger) Fatal(format string, a ...interface{}) {
logger.doPrintf(fatalLevel, printFatalLevel, format, a...)
}
var gLogger, _ = New("debug", "", log.LstdFlags)
// It's dangerous to call the method on logging
func Export(logger *Logger) {
if logger != nil {
gLogger = logger
}
}
func GetBaseLogger() *log.Logger {
return gLogger.baseLogger
}
func Debug(format string, a ...interface{}) {
gLogger.doPrintf(debugLevel, printDebugLevel, format, a...)
}
func Release(format string, a ...interface{}) {
gLogger.doPrintf(releaseLevel, printReleaseLevel, format, a...)
}
func Error(format string, a ...interface{}) {
gLogger.doPrintf(errorLevel, printErrorLevel, format, a...)
}
func Fatal(format string, a ...interface{}) {
gLogger.doPrintf(fatalLevel, printFatalLevel, format, a...)
}
func Recover(r interface{}) {
buf := make([]byte, 4096)
l := runtime.Stack(buf, false)
Error("%v: %s", r, buf[:l])
}
func Close() {
gLogger.Close()
}