func router(r *nsq.Reader, f *FileLogger, termChan chan os.Signal, hupChan chan os.Signal) {
pos := 0
output := make([]*Message, *maxInFlight)
sync := false
ticker := time.NewTicker(time.Duration(30) * time.Second)
closing := false
for {
select {
case <-termChan:
ticker.Stop()
r.Stop()
// ensures that we keep flushing whatever is left in the channels
closing = true
case <-hupChan:
f.Close()
f.updateFile()
sync = true
case <-ticker.C:
f.updateFile()
sync = true
case m := <-f.logChan:
if f.updateFile() {
sync = true
}
_, err := f.Write(m.Body)
if err != nil {
log.Fatalf("ERROR: writing message to disk - %s", err.Error())
}
_, err = f.Write([]byte("\n"))
if err != nil {
log.Fatalf("ERROR: writing newline to disk - %s", err.Error())
}
output[pos] = m
pos++
if pos == *maxInFlight {
sync = true
}
}
if closing || sync || r.IsStarved() {
if pos > 0 {
log.Printf("syncing %d records to disk", pos)
err := f.Sync()
if err != nil {
log.Fatalf("ERROR: failed syncing messages - %s", err.Error())
}
for pos > 0 {
pos--
m := output[pos]
m.returnChannel <- &nsq.FinishedMessage{m.Id, 0, true}
output[pos] = nil
}
}
sync = false
}
}
}
func (f *FileLogger) router(r *nsq.Reader, termChan chan os.Signal, hupChan chan os.Signal) {
pos := 0
output := make([]*Message, *maxInFlight)
sync := false
ticker := time.NewTicker(time.Duration(30) * time.Second)
closing := false
closeFile := false
exit := false
for {
select {
case <-r.ExitChan:
sync = true
closeFile = true
exit = true
case <-termChan:
ticker.Stop()
r.Stop()
sync = true
closing = true
case <-hupChan:
sync = true
closeFile = true
case <-ticker.C:
if f.needsFileRotate() {
if *skipEmptyFiles {
closeFile = true
} else {
f.updateFile()
}
}
sync = true
case m := <-f.logChan:
if f.updateFile() {
sync = true
}
_, err := f.Write(m.Body)
if err != nil {
log.Fatalf("ERROR: writing message to disk - %s", err.Error())
}
_, err = f.Write([]byte("\n"))
if err != nil {
log.Fatalf("ERROR: writing newline to disk - %s", err.Error())
}
output[pos] = m
pos++
if pos == *maxInFlight {
sync = true
}
}
if closing || sync || r.IsStarved() {
if pos > 0 {
log.Printf("syncing %d records to disk", pos)
err := f.Sync()
if err != nil {
log.Fatalf("ERROR: failed syncing messages - %s", err.Error())
}
for pos > 0 {
pos--
m := output[pos]
m.returnChannel <- &nsq.FinishedMessage{m.Id, 0, true}
output[pos] = nil
}
}
sync = false
}
if closeFile {
f.Close()
closeFile = false
}
if exit {
close(f.ExitChan)
break
}
}
}