78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
|
package blockrepo
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/binary"
|
||
|
|
|
||
|
|
"github.com/pkg/errors"
|
||
|
|
|
||
|
|
"github.com/lbryio/lbcd/chaincfg/chainhash"
|
||
|
|
|
||
|
|
"github.com/cockroachdb/pebble"
|
||
|
|
)
|
||
|
|
|
||
|
|
type Pebble struct {
|
||
|
|
db *pebble.DB
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewPebble(path string) (*Pebble, error) {
|
||
|
|
|
||
|
|
db, err := pebble.Open(path, &pebble.Options{MaxOpenFiles: 2000})
|
||
|
|
repo := &Pebble{db: db}
|
||
|
|
|
||
|
|
return repo, errors.Wrapf(err, "unable to open %s", path)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (repo *Pebble) Load() (int32, error) {
|
||
|
|
|
||
|
|
iter := repo.db.NewIter(nil)
|
||
|
|
if !iter.Last() {
|
||
|
|
err := iter.Close()
|
||
|
|
return 0, errors.Wrap(err, "closing iterator with no last")
|
||
|
|
}
|
||
|
|
|
||
|
|
height := int32(binary.BigEndian.Uint32(iter.Key()))
|
||
|
|
err := iter.Close()
|
||
|
|
return height, errors.Wrap(err, "closing iterator")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (repo *Pebble) Get(height int32) (*chainhash.Hash, error) {
|
||
|
|
|
||
|
|
key := make([]byte, 4)
|
||
|
|
binary.BigEndian.PutUint32(key, uint32(height))
|
||
|
|
|
||
|
|
b, closer, err := repo.db.Get(key)
|
||
|
|
if closer != nil {
|
||
|
|
defer closer.Close()
|
||
|
|
}
|
||
|
|
if err != nil {
|
||
|
|
return nil, errors.Wrap(err, "in get")
|
||
|
|
}
|
||
|
|
hash, err := chainhash.NewHash(b)
|
||
|
|
return hash, errors.Wrap(err, "creating hash")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (repo *Pebble) Set(height int32, hash *chainhash.Hash) error {
|
||
|
|
|
||
|
|
key := make([]byte, 4)
|
||
|
|
binary.BigEndian.PutUint32(key, uint32(height))
|
||
|
|
|
||
|
|
return errors.WithStack(repo.db.Set(key, hash[:], pebble.NoSync))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (repo *Pebble) Close() error {
|
||
|
|
|
||
|
|
err := repo.db.Flush()
|
||
|
|
if err != nil {
|
||
|
|
// if we fail to close are we going to try again later?
|
||
|
|
return errors.Wrap(err, "on flush")
|
||
|
|
}
|
||
|
|
|
||
|
|
err = repo.db.Close()
|
||
|
|
return errors.Wrap(err, "on close")
|
||
|
|
}
|
||
|
|
|
||
|
|
func (repo *Pebble) Flush() error {
|
||
|
|
_, err := repo.db.AsyncFlush()
|
||
|
|
return err
|
||
|
|
}
|