125 lines
3 KiB
Go
125 lines
3 KiB
Go
package storage
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/CityOfZion/neo-go/pkg/io"
|
|
"github.com/etcd-io/bbolt"
|
|
log "github.com/sirupsen/logrus"
|
|
"github.com/syndtr/goleveldb/leveldb/util"
|
|
)
|
|
|
|
// BoltDBOptions configuration for boltdb.
|
|
type BoltDBOptions struct {
|
|
FilePath string `yaml:"FilePath"`
|
|
}
|
|
|
|
// Bucket represents bucket used in boltdb to store all the data.
|
|
var Bucket = []byte("DB")
|
|
|
|
// BoltDBStore it is the storage implementation for storing and retrieving
|
|
// blockchain data.
|
|
type BoltDBStore struct {
|
|
db *bbolt.DB
|
|
}
|
|
|
|
// NewBoltDBStore returns a new ready to use BoltDB storage with created bucket.
|
|
func NewBoltDBStore(cfg BoltDBOptions) (*BoltDBStore, error) {
|
|
var opts *bbolt.Options // should be exposed via BoltDBOptions if anything needed
|
|
fileMode := os.FileMode(0600) // should be exposed via BoltDBOptions if anything needed
|
|
fileName := cfg.FilePath
|
|
if err := io.MakeDirForFile(fileName, "BoltDB"); err != nil {
|
|
return nil, err
|
|
}
|
|
db, err := bbolt.Open(fileName, fileMode, opts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
err = db.Update(func(tx *bbolt.Tx) error {
|
|
_, err = tx.CreateBucketIfNotExists(Bucket)
|
|
if err != nil {
|
|
return fmt.Errorf("could not create root bucket: %v", err)
|
|
}
|
|
return nil
|
|
})
|
|
|
|
return &BoltDBStore{db: db}, nil
|
|
}
|
|
|
|
// Put implements the Store interface.
|
|
func (s *BoltDBStore) Put(key, value []byte) error {
|
|
return s.db.Update(func(tx *bbolt.Tx) error {
|
|
b := tx.Bucket(Bucket)
|
|
err := b.Put(key, value)
|
|
return err
|
|
})
|
|
}
|
|
|
|
// Get implements the Store interface.
|
|
func (s *BoltDBStore) Get(key []byte) (val []byte, err error) {
|
|
err = s.db.View(func(tx *bbolt.Tx) error {
|
|
b := tx.Bucket(Bucket)
|
|
val = b.Get(key)
|
|
return nil
|
|
})
|
|
if val == nil {
|
|
err = ErrKeyNotFound
|
|
}
|
|
return
|
|
}
|
|
|
|
// Delete implements the Store interface.
|
|
func (s *BoltDBStore) Delete(key []byte) error {
|
|
return s.db.Update(func(tx *bbolt.Tx) error {
|
|
b := tx.Bucket(Bucket)
|
|
return b.Delete(key)
|
|
})
|
|
}
|
|
|
|
// PutBatch implements the Store interface.
|
|
func (s *BoltDBStore) PutBatch(batch Batch) error {
|
|
return s.db.Batch(func(tx *bbolt.Tx) error {
|
|
b := tx.Bucket(Bucket)
|
|
for k, v := range batch.(*MemoryBatch).mem {
|
|
err := b.Put([]byte(k), v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for k := range batch.(*MemoryBatch).del {
|
|
err := b.Delete([]byte(k))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// Seek implements the Store interface.
|
|
func (s *BoltDBStore) Seek(key []byte, f func(k, v []byte)) {
|
|
err := s.db.View(func(tx *bbolt.Tx) error {
|
|
c := tx.Bucket(Bucket).Cursor()
|
|
prefix := util.BytesPrefix(key)
|
|
for k, v := c.Seek(prefix.Start); k != nil && bytes.Compare(k, prefix.Limit) <= 0; k, v = c.Next() {
|
|
f(k, v)
|
|
}
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
log.Error("error while executing seek in boltDB")
|
|
}
|
|
}
|
|
|
|
// Batch implements the Batch interface and returns a boltdb
|
|
// compatible Batch.
|
|
func (s *BoltDBStore) Batch() Batch {
|
|
return newMemoryBatch()
|
|
}
|
|
|
|
// Close releases all db resources.
|
|
func (s *BoltDBStore) Close() error {
|
|
return s.db.Close()
|
|
}
|