func (m *master) sync() error {
var err error
var syncID uint64
if syncID, err = m.nextSyncLogID(); err != nil {
return err
}
if err := m.conn.Send("sync", syncID); err != nil {
return err
}
m.state.Set(replConnectedState)
m.syncBuf.Reset()
if err = m.conn.ReceiveBulkTo(&m.syncBuf); err != nil {
if strings.Contains(err.Error(), ledis.ErrLogMissed.Error()) {
return m.fullSync()
} else {
return err
}
}
m.state.Set(replConnectedState)
buf := m.syncBuf.Bytes()
if len(buf) < 8 {
return fmt.Errorf("inavlid sync size %d", len(buf))
}
m.app.info.Replication.MasterLastLogID.Set(num.BytesToUint64(buf))
var t bytes.Buffer
m.app.info.dumpReplication(&t)
buf = buf[8:]
if len(buf) == 0 {
return nil
}
if err = m.app.ldb.StoreLogsFromData(buf); err != nil {
return err
}
return nil
}
func (s *GoLevelDBStore) lastID() (uint64, error) {
if s.last != InvalidLogID {
return s.last, nil
}
it := s.db.NewIterator()
defer it.Close()
it.SeekToLast()
if it.Valid() {
s.last = num.BytesToUint64(it.RawKey())
}
return s.last, nil
}