func (s *GoLevelDBStore) open() error {
var err error
s.first = InvalidLogID
s.last = InvalidLogID
s.db, err = store.Open(s.cfg)
return err
}
func Open(cfg *config.Config) (*Ledis, error) {
if len(cfg.DataDir) == 0 {
cfg.DataDir = config.DefaultDataDir
}
if cfg.Databases == 0 {
cfg.Databases = 16
} else if cfg.Databases > MaxDatabases {
cfg.Databases = MaxDatabases
}
os.MkdirAll(cfg.DataDir, 0755)
var err error
l := new(Ledis)
l.cfg = cfg
if l.lock, err = filelock.Lock(path.Join(cfg.DataDir, "LOCK")); err != nil {
return nil, err
}
l.quit = make(chan struct{})
if l.ldb, err = store.Open(cfg); err != nil {
return nil, err
}
if cfg.UseReplication {
if l.r, err = rpl.NewReplication(cfg); err != nil {
return nil, err
}
l.rc = make(chan struct{}, 1)
l.rbatch = l.ldb.NewWriteBatch()
l.rDoneCh = make(chan struct{}, 1)
l.wg.Add(1)
go l.onReplication()
//first we must try wait all replication ok
//maybe some logs are not committed
l.WaitReplication()
} else {
l.r = nil
}
l.dbs = make(map[int]*DB, 16)
l.checkTTL()
return l, nil
}