func (src *Client) Run() error {
src.running = true
defer func() {
src.running = false
}()
metrics.Gm.Register(stream.Name(src))
go func(op string, s *Client) { // Update the queue depth on input for each phase
for {
metrics.Gm.Update(&op, s.GetInDepth())
time.Sleep(1 * time.Second)
}
}(stream.Name(src), src)
for src.retries < RETRY_MAX {
err := src.connect()
if err == nil {
slog.Warnf("Connection failed without error")
return err
} else {
slog.Errorf("Connection failed with error, retrying: %s", err)
time.Sleep(1 * time.Second)
}
}
slog.Errorf("Connection failed retries exceeded. Leftover: %d", src.buf.Len())
return nil //>>>>>>>>>>>>>>???????????????????????
}
func (src *Client) connect() error {
defer func() {
src.retries++
}()
conn, err := net.Dial("tcp", src.addr)
if err != nil {
slog.Errorf("Cannot establish a connection with %s %v", src.addr, err)
return err
}
wg_sub := &sync.WaitGroup{}
defer wg_sub.Wait()
rcvChData := make(chan stream.Object, 10)
receiver := source.NewIOReaderSourceLengthDelim(conn)
receiver.SetOut(rcvChData)
rcvChCloseNotifier := make(chan bool)
wg_sub.Add(1)
go func() {
defer wg_sub.Done()
defer close(rcvChCloseNotifier)
err := receiver.Run()
if err != nil {
slog.Errorf("Error in client reciever: %v", err)
}
}()
//receiver will be closed by the sender after it is done sending. receiver closed via a hard stop.
writeNotifier := stream.NewNonBlockingProcessedNotifier(2)
sndChData := make(chan stream.Object, src.hwm)
sndChCloseNotifier := make(chan bool)
defer close(sndChData)
sender := sink.NewMultiPartWriterSink(conn)
sender.CompletedNotifier = writeNotifier
sender.SetIn(sndChData)
wg_sub.Add(1)
go func() {
defer receiver.Stop() //close receiver
defer wg_sub.Done()
defer close(sndChCloseNotifier)
err := sender.Run()
if err != nil {
slog.Errorf("Error in client sender: %v", err)
}
}()
//sender closed by closing the sndChData channel or by a hard stop
if src.buf.Len() > 0 {
leftover := src.buf.Reset()
for i, value := range leftover {
sendData(sndChData, value, i+1)
}
}
timer := src.resetAckTimer()
closing := false
//defer log.Println("Exiting client loop")
opName := stream.Name(src)
writesNotCompleted := uint(0)
for {
upstreamCh := src.In()
if !src.buf.CanAdd() || closing {
//disable upstream listening
upstreamCh = nil
}
if closing && src.buf.Len() == 0 {
sendClose(sndChData, 100)
return nil
}
select {
case msg, ok := <-upstreamCh:
if !ok {
//softClose
//make sure everything was sent
closing = true
} else {
bytes := msg.([]byte)
seq, err := src.buf.Add(bytes)
if err != nil {
slog.Fatalf("Error adding item to buffer %v", err)
return err
}
sendData(sndChData, bytes, seq)
writesNotCompleted += 1
metrics.Gm.Event(&opName) // These are batched
//slog.Logf(logger.Levels.Debug, "Sent batch -- length %d seq %d", len(bytes), seq)
}
case cnt := <-writeNotifier.NotificationChannel():
writesNotCompleted -= cnt
if timer == nil {
slog.Debugf("Seting timer %v, %v", time.Now(), time.Now().UnixNano())
timer = src.resetAckTimer()
}
case obj, ok := <-rcvChData:
slog.Debugf("in Rcv: %v", ok)
if !ok {
return errors.New("Connection to Server was Broken in Recieve Direction")
}
command, seq, _, err := parseMsg(obj.([]byte))
if err != nil {
slog.Fatalf("%v", err)
}
if command == ACK {
if src.processAck(seq) {
timer = src.resetAckTimer()
}
} else {
slog.Fatalf("Unknown Command: %v", command)
}
case <-rcvChCloseNotifier:
//connection threw an eof to the reader?
return errors.New("In Select: Recieve Closed")
case <-sndChCloseNotifier:
return errors.New("Connection to Server was Broken in Send Direction")
case <-timer:
return errors.New(fmt.Sprintf("Time Out Waiting For Ack, %d %v %v", len(rcvChData), time.Now(), time.Now().UnixNano()))
case <-src.StopNotifier:
sender.Stop()
return nil
}
}
}