func sendMessageAndExpectAnAck(stream *comm.Stream, dead chan bool, message *messages.Message) {
err := stream.WriteMessage(message)
if err != nil {
log.Printf("Unable to send message to client: %v\n", err)
dead <- true
return
}
expectedAck := messages.MessageAck{
Partition: message.Partition,
Offset: message.Offset,
}
acks[expectedAck] = make(chan bool)
go func() {
select {
case _ = <-acks[expectedAck]:
break
case <-time.After(50 * time.Millisecond):
if !message.IsAckRequest {
blackHole.inbox <- *message
}
dead <- true
}
delete(acks, expectedAck)
}()
}
