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logging.go
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logging.go
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package logging
import (
"fmt"
"gorobbs/package/file"
"log"
"os"
"path/filepath"
"runtime"
)
type Level int
var (
F *os.File
DefaultPrefix = ""
DefaultCallerDepth = 2
logger *log.Logger
logPrefix = ""
levelFlags = []string{"DEBUG", "INFO", "WARN", "ERROR", "FATAL"}
)
const (
DEBUG Level = iota
INFO
WARNING
ERROR
FATAL
)
// Setup initialize the log instance
func Setup() {
var err error
filePath := getLogFilePath()
fileName := getLogFileName()
F, err = file.MustOpen(fileName, filePath)
if err != nil {
log.Fatalf("logging.Setup err: %v", err)
}
logger = log.New(F, DefaultPrefix, log.LstdFlags)
}
// Debug output logs at debug level
func Debug(v ...interface{}) {
setPrefix(DEBUG)
logger.Println(v)
}
// Info output logs at info level
func Info(v ...interface{}) {
setPrefix(INFO)
logger.Println(v)
}
// Warn output logs at warn level
func Warn(v ...interface{}) {
setPrefix(WARNING)
logger.Println(v)
}
// Error output logs at error level
func Error(v ...interface{}) {
setPrefix(ERROR)
logger.Println(v)
}
// Fatal output logs at fatal level
func Fatal(v ...interface{}) {
setPrefix(FATAL)
logger.Fatalln(v)
}
// setPrefix set the prefix of the log output
func setPrefix(level Level) {
_, file, line, ok := runtime.Caller(DefaultCallerDepth)
if ok {
logPrefix = fmt.Sprintf("[%s][%s:%d]", levelFlags[level], filepath.Base(file), line)
} else {
logPrefix = fmt.Sprintf("[%s]", levelFlags[level])
}
logger.SetPrefix(logPrefix)
}