/*
Queue is used to append client messages when the node is a leader.
NOTE: The lock is not held in this method as we do not touch commitIndex or waitingReaders
*/
func (clog *CommitLog) Queue(term int64, modelMsgs model.Messages) (IDs []int64, err error) {
//clog.node_log("Queueing messages: %v\n", msgs)
//modelMsgs := model.MessagesFromClientData(msgs)
if modelMsgs.GetCount() == 0 {
clog.node_log("No messages found from client for Queue.")
return nil, errors.New("No messages found to be Queued.")
}
err = modelMsgs.SetMessageTerm(term)
if err != nil {
clog.node_log("Error setting terms for messages: %v\n", err)
return nil, err
}
// Stick them on the end of the log
lastIndex, err := clog.log.AppendMessages(modelMsgs)
if err != nil {
clog.node_log("Error writing message to log in Queue: %v\n", err)
return nil, err
} else if clog.syncPolicy == WRITE_SYNC {
err = clog.log.Sync()
if err != nil {
clog.node_log("Error syncing written message to log in Queue: %v\n", err)
return nil, err
}
}
//time.Sleep(time.Millisecond * 500)
numMessages := modelMsgs.GetCount()
results := make([]int64, numMessages)
// If log has one message, and two are added: lastIndex (3) - len (modelMsgs (2)) + 1 = 2
index := lastIndex - int64(numMessages) + 1
for i := 0; i < numMessages; i++ {
results[i] = index
index++
}
return results, nil
}
