func (w *WriteClient) write(data []byte) error {
msgCount := atomic.AddUint64(&w.msgCount, 1)
md := model.NewMetaData(w.id, msgCount, model.NewUUID()) //TODO transactionid should be supplied
entry := model.NewLogEntry(md, data)
request := model.NewWriteRequest(entry)
conn := w.connectionPool.Connection()
if _, err := conn.Write(encoder.EncodePayload(request)); err != nil {
return err
}
return nil
}
//Subscribe creates a subsciption on the log, which in realtime outputs all written log entries to the return channel from the time of subscription
func (r *ReadClient) Subscribe() <-chan model.LogEntry {
subscribeChan := make(chan model.LogEntry)
go func(chan<- model.LogEntry) {
for _, conn := range r.connectionPool.AllConnections() {
req := model.NewSubscribeRequest()
if _, err := conn.Write(encoder.EncodePayload(req)); err != nil {
log.Fatal(err)
}
go writeLogEntryToChan(subscribeChan, conn)
}
}(subscribeChan)
return subscribeChan
}