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log_writer.go
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/
log_writer.go
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package internal
import (
"log"
"os"
"time"
"v2ray.com/core/common/platform"
"v2ray.com/core/common/signal"
)
type LogWriter interface {
Log(LogEntry)
Close()
}
type NoOpLogWriter struct {
}
func (this *NoOpLogWriter) Log(entry LogEntry) {
entry.Release()
}
func (this *NoOpLogWriter) Close() {
}
type StdOutLogWriter struct {
logger *log.Logger
cancel *signal.CancelSignal
}
func NewStdOutLogWriter() LogWriter {
return &StdOutLogWriter{
logger: log.New(os.Stdout, "", log.Ldate|log.Ltime),
cancel: signal.NewCloseSignal(),
}
}
func (this *StdOutLogWriter) Log(log LogEntry) {
this.logger.Print(log.String() + platform.LineSeparator())
log.Release()
}
func (this *StdOutLogWriter) Close() {
time.Sleep(500 * time.Millisecond)
}
type FileLogWriter struct {
queue chan string
logger *log.Logger
file *os.File
cancel *signal.CancelSignal
}
func (this *FileLogWriter) Log(log LogEntry) {
select {
case this.queue <- log.String():
default:
// We don't expect this to happen, but don't want to block main thread as well.
}
log.Release()
}
func (this *FileLogWriter) run() {
this.cancel.WaitThread()
defer this.cancel.FinishThread()
for {
entry, open := <-this.queue
if !open {
break
}
this.logger.Print(entry + platform.LineSeparator())
}
}
func (this *FileLogWriter) Close() {
close(this.queue)
this.cancel.WaitForDone()
this.file.Close()
}
func NewFileLogWriter(path string) (*FileLogWriter, error) {
file, err := os.OpenFile(path, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return nil, err
}
logger := &FileLogWriter{
queue: make(chan string, 16),
logger: log.New(file, "", log.Ldate|log.Ltime),
file: file,
cancel: signal.NewCloseSignal(),
}
go logger.run()
return logger, nil
}