func (stable *boltDBStable) GetLogsFrom(from uint64) []*Rlog {
logs := []*Rlog{}
err := stable.db.View(func(tx *bolt.Tx) error {
b := tx.Bucket(boltLogs)
c := b.Cursor()
// if from > last index return empty
if index, _ := c.Last(); index != nil {
if from > convertBytesToUint64(index) {
return nil
}
}
for k, v := c.Seek(convertUint64ToBytes(from)); k != nil; k, v = c.Next() {
log := &Rlog{}
dec := codec.NewDecoderBytes(v, msgPackHandle)
if err := dec.Decode(log); err != nil {
return err
}
logs = append(logs, log)
}
return nil
})
if err != nil {
panic("Could not get logs")
}
return logs
}
func (stable *boltDBStable) GetLog(k uint64) (*Rlog, error) {
log := &Rlog{}
err := stable.db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket(boltLogs)
val := bucket.Get(convertUint64ToBytes(k))
if val == nil {
return ErrKeyNotFound
}
dec := codec.NewDecoderBytes(val, msgPackHandle)
err := dec.Decode(log)
if err != nil {
return err
}
return nil
})
if err != nil && err != ErrKeyNotFound {
panic("Could not get log")
} else if err != nil {
return nil, err
}
return log, nil
}
func (stable *boltDBStable) LastLog() *Rlog {
retLog := &Rlog{
Index: 0,
}
err := stable.db.View(func(tx *bolt.Tx) error {
b := tx.Bucket(boltLogs)
c := b.Cursor()
var log []byte
if _, log = c.Last(); log == nil {
return nil
}
dec := codec.NewDecoderBytes(log, msgPackHandle)
err := dec.Decode(retLog)
return err
})
if err != nil {
panic("Could not get last log")
}
return retLog
}
func (r *Raft) readSnapshot() (*fsmSnapshot, error) {
snap, err := ioutil.ReadFile(fmt.Sprintf("%s/snapshot/snapshot.bin", r.config.BaseDir))
if err != nil {
return nil, err
}
snapshot := &fsmSnapshot{}
dec := codec.NewDecoderBytes(snap, msgPackHandle)
err = dec.Decode(snapshot)
if err != nil {
return nil, err
}
return snapshot, nil
}