/*
getAtLeastMessages keeps calling clog.GetMessages until the count of messages has been retrieved.
Callers must be certain that index + count < lastIndex
*/
func (clog *CommitLog) getAtLeastMessages(index, count int64) (model.Messages, error) {
var readMessageCount int64
indexToRead := index
var results model.Messages
var err error
for readMessageCount < count && err == nil {
var msgs model.Messages
msgs, err = clog.log.GetMessages(indexToRead, count-readMessageCount)
if err != nil {
return model.EMPTY_MESSAGES, err
}
if msgs.GetCount() > 0 {
readMessageCount += int64(msgs.GetCount())
indexToRead += int64(msgs.GetCount())
results, err = results.Join(msgs)
if err != nil {
return model.EMPTY_MESSAGES, err
}
}
}
return results, err
}
