77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package chainrepo
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import (
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"encoding/binary"
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"github.com/pkg/errors"
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"github.com/lbryio/lbcd/claimtrie/change"
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"github.com/vmihailenco/msgpack/v5"
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"github.com/cockroachdb/pebble"
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)
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type Pebble struct {
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db *pebble.DB
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}
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func NewPebble(path string) (*Pebble, error) {
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db, err := pebble.Open(path, &pebble.Options{BytesPerSync: 64 << 20, MaxOpenFiles: 2000})
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repo := &Pebble{db: db}
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return repo, errors.Wrapf(err, "open %s", path)
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}
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func (repo *Pebble) Save(height int32, changes []change.Change) error {
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if len(changes) == 0 {
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return nil
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}
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var key [4]byte
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binary.BigEndian.PutUint32(key[:], uint32(height))
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value, err := msgpack.Marshal(changes)
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if err != nil {
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return errors.Wrap(err, "in marshaller")
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}
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err = repo.db.Set(key[:], value, pebble.NoSync)
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return errors.Wrap(err, "in set")
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}
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func (repo *Pebble) Load(height int32) ([]change.Change, error) {
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var key [4]byte
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binary.BigEndian.PutUint32(key[:], uint32(height))
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b, closer, err := repo.db.Get(key[:])
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if closer != nil {
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defer closer.Close()
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}
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if err != nil {
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return nil, errors.Wrap(err, "in get")
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}
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var changes []change.Change
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err = msgpack.Unmarshal(b, &changes)
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return changes, errors.Wrap(err, "in unmarshaller")
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}
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func (repo *Pebble) Close() error {
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err := repo.db.Flush()
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if err != nil {
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// if we fail to close are we going to try again later?
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return errors.Wrap(err, "on flush")
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}
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err = repo.db.Close()
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return errors.Wrap(err, "on close")
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}
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func (repo *Pebble) Flush() error {
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_, err := repo.db.AsyncFlush()
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return err
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}
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