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file_logger.go
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/
file_logger.go
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package logger
import (
"bufio"
"errors"
"fmt"
"os"
"sync"
)
type logFile struct {
file *os.File
writer *bufio.Writer
lock sync.Mutex
destroyed bool
}
var (
logfileAlreadyClosedError = errors.New("logfile already closed")
logfileAlreadyInitializedError = errors.New("logfile already initialized")
)
func (l *logFile) WriteLog(_ Level, line string) {
fmt.Fprint(l, line)
}
func (l *logFile) UseAnsi() bool {
return false
}
func (l *logFile) Write(p []byte) (n int, err error) {
l.lock.Lock()
defer l.lock.Unlock()
if l.destroyed {
return 0, logfileAlreadyClosedError
}
return l.writer.Write(p)
}
func (l *logFile) Close() error {
l.lock.Lock()
defer l.lock.Unlock()
if l.destroyed {
return logfileAlreadyClosedError
}
l.destroyed = true
if err := l.writer.Flush(); err != nil {
return err
}
return l.file.Close()
}
func (l *logFile) Level() Level {
return NoLogLevel
}