func (rec *Receiver) fetch() error {
fetch := store.FetchRequest{
Partition: rec.path.Partition(),
MessageC: make(chan store.MessageAndId, 3),
ErrorCallback: make(chan error),
StartCallback: make(chan int),
Prefix: []byte(rec.path),
Count: rec.maxCount,
}
if rec.startId >= 0 {
fetch.Direction = 1
fetch.StartId = uint64(rec.startId)
if rec.maxCount == 0 {
fetch.Count = math.MaxInt32
}
} else {
fetch.Direction = 1
maxId, err := rec.messageStore.MaxMessageId(rec.path.Partition())
if err != nil {
return err
}
fetch.StartId = maxId + 1 + uint64(rec.startId)
if rec.maxCount == 0 {
fetch.Count = -1 * int(rec.startId)
}
}
rec.messageStore.Fetch(fetch)
for {
select {
case numberOfResults := <-fetch.StartCallback:
rec.sendOK(protocol.SUCCESS_FETCH_START, fmt.Sprintf("%v %v", rec.path, numberOfResults))
case msgAndId, open := <-fetch.MessageC:
if !open {
rec.sendOK(protocol.SUCCESS_FETCH_END, string(rec.path))
return nil
}
logger.WithFields(log.Fields{
"msgId": msgAndId.Id,
"msg": string(msgAndId.Message),
}).Debug("Reply sen to")
rec.lastSendId = msgAndId.Id
rec.sendC <- msgAndId.Message
case err := <-fetch.ErrorCallback:
return err
case <-rec.cancelC:
rec.shouldStop = true
rec.sendOK(protocol.SUCCESS_CANCELED, string(rec.path))
// TODO implement cancellation in message store
return nil
}
}
}
func (rec *Receiver) fetch() error {
var err error
fetch := store.FetchRequest{
Partition: rec.path.Partition(),
MessageC: make(chan store.MessageAndId, 3),
ErrorCallback: make(chan error),
StartCallback: make(chan int),
Prefix: []byte(rec.path),
Count: rec.maxCount,
}
if rec.startId >= 0 {
fetch.Direction = 1
fetch.StartId = uint64(rec.startId)
if rec.maxCount == 0 {
fetch.Count = math.MaxInt32
}
} else {
fetch.Direction = -1
if fetch.StartId, err = rec.messageStore.MaxMessageId(rec.path.Partition()); err != nil {
return err
}
if rec.maxCount == 0 {
fetch.Count = -1 * int(rec.startId)
}
}
rec.messageStore.Fetch(fetch)
for {
select {
case numberOfResults := <-fetch.StartCallback:
rec.sendOK(guble.SUCCESS_FETCH_START, fmt.Sprintf("%v %v", rec.path, numberOfResults))
case msgAndId, open := <-fetch.MessageC:
if !open {
rec.sendOK(guble.SUCCESS_FETCH_END, string(rec.path))
return nil
}
guble.Debug("replay send %v, %v", msgAndId.Id, string(msgAndId.Message))
rec.lastSendId = msgAndId.Id
rec.sendChannel <- msgAndId.Message
case err := <-fetch.ErrorCallback:
return err
case <-rec.cancelChannel:
rec.shouldStop = true
rec.sendOK(guble.SUCCESS_CANCELED, string(rec.path))
// TODO implement cancellation in message store
return nil
}
}
}
