func (this *Mirror) pump(sub *consumergroup.ConsumerGroup, pub sarama.AsyncProducer, stop chan struct{}) {
defer func() {
log.Println("pump cleanup...")
sub.Close()
log.Println("pump cleanup ok")
stop <- struct{}{} // notify others I'm done
}()
log.Printf("start pumping")
active := false
for {
select {
case <-this.quit:
return
case <-stop:
// yes sir!
return
case <-time.After(time.Second * 10):
active = false
log.Println("idle 10s waiting for new msg")
case msg := <-sub.Messages():
if !active || this.debug {
log.Printf("<-[%d] T:%s M:%s", this.transferN, msg.Topic, string(msg.Value))
}
active = true
pub.Input() <- &sarama.ProducerMessage{
Topic: msg.Topic,
Key: sarama.ByteEncoder(msg.Key),
Value: sarama.ByteEncoder(msg.Value),
}
if this.autoCommit {
sub.CommitUpto(msg)
}
// rate limit, never overflood the limited bandwidth between IDCs
// FIXME when compressed, the bandwidth calculation is wrong
bytesN := len(msg.Topic) + len(msg.Key) + len(msg.Value) + 20 // payload overhead
if !this.bandwidthRateLimiter.Pour(bytesN) {
time.Sleep(time.Second)
this.Ui.Warn(fmt.Sprintf("%d -> bandwidth reached, backoff 1s", bytesN))
}
this.transferBytes += int64(bytesN)
this.transferN++
if this.transferN%this.progressStep == 0 {
log.Println(gofmt.Comma(this.transferN))
}
case err := <-sub.Errors():
this.Ui.Error(err.Error()) // TODO
}
}
}
func (this *Mirror) pump(sub *consumergroup.ConsumerGroup, pub sarama.AsyncProducer,
stop, stopped chan struct{}) {
defer func() {
log.Trace("closing sub, commit offsets...")
sub.Close()
stopped <- struct{}{} // notify others I'm done
}()
active := true
backoff := time.Second * 2
idle := time.Second * 10
for {
select {
case <-this.quit:
log.Trace("got signal quit")
return
case <-stop:
// yes sir!
log.Trace("got signal stop")
return
case <-time.After(idle):
active = false
log.Info("idle 10s waiting for new message")
case msg, ok := <-sub.Messages():
if !ok {
log.Warn("sub encounters end of message stream")
return
}
if !active || this.Debug {
log.Info("<-[#%d] T:%s M:%s", this.transferN, msg.Topic, string(msg.Value))
}
active = true
pub.Input() <- &sarama.ProducerMessage{
Topic: msg.Topic,
Key: sarama.ByteEncoder(msg.Key),
Value: sarama.ByteEncoder(msg.Value),
}
if this.AutoCommit {
sub.CommitUpto(msg)
}
// rate limit, never overflood the limited bandwidth between IDCs
// FIXME when compressed, the bandwidth calculation is wrong
bytesN := len(msg.Topic) + len(msg.Key) + len(msg.Value) + 20 // payload overhead
if this.bandwidthRateLimiter != nil && !this.bandwidthRateLimiter.Pour(bytesN) {
log.Warn("%s -> bandwidth reached, backoff %s", gofmt.ByteSize(this.transferBytes), backoff)
time.Sleep(backoff)
}
this.transferBytes += int64(bytesN)
this.transferN++
if this.transferN%this.ProgressStep == 0 {
log.Trace("%s %s %s", gofmt.Comma(this.transferN), gofmt.ByteSize(this.transferBytes), msg.Topic)
}
case err := <-sub.Errors():
log.Error("quitting pump %v", err)
return
}
}
}