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  1. package db
  2. import (
  3. "fmt"
  4. "github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb"
  5. "github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/errors"
  6. "github.com/tendermint/tendermint/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/opt"
  7. "path"
  8. . "github.com/tendermint/tendermint/common"
  9. )
  10. type LevelDB struct {
  11. db *leveldb.DB
  12. }
  13. func NewLevelDB(name string) (*LevelDB, error) {
  14. dbPath := path.Join(name)
  15. db, err := leveldb.OpenFile(dbPath, nil)
  16. if err != nil {
  17. return nil, err
  18. }
  19. database := &LevelDB{db: db}
  20. return database, nil
  21. }
  22. func (db *LevelDB) Get(key []byte) []byte {
  23. res, err := db.db.Get(key, nil)
  24. if err != nil {
  25. if err == errors.ErrNotFound {
  26. return nil
  27. } else {
  28. PanicCrisis(err)
  29. }
  30. }
  31. return res
  32. }
  33. func (db *LevelDB) Set(key []byte, value []byte) {
  34. err := db.db.Put(key, value, nil)
  35. if err != nil {
  36. PanicCrisis(err)
  37. }
  38. }
  39. func (db *LevelDB) SetSync(key []byte, value []byte) {
  40. err := db.db.Put(key, value, &opt.WriteOptions{Sync: true})
  41. if err != nil {
  42. PanicCrisis(err)
  43. }
  44. }
  45. func (db *LevelDB) Delete(key []byte) {
  46. err := db.db.Delete(key, nil)
  47. if err != nil {
  48. PanicCrisis(err)
  49. }
  50. }
  51. func (db *LevelDB) DeleteSync(key []byte) {
  52. err := db.db.Delete(key, &opt.WriteOptions{Sync: true})
  53. if err != nil {
  54. PanicCrisis(err)
  55. }
  56. }
  57. func (db *LevelDB) DB() *leveldb.DB {
  58. return db.db
  59. }
  60. func (db *LevelDB) Close() {
  61. db.db.Close()
  62. }
  63. func (db *LevelDB) Print() {
  64. iter := db.db.NewIterator(nil, nil)
  65. for iter.Next() {
  66. key := iter.Key()
  67. value := iter.Value()
  68. fmt.Printf("[%X]:\t[%X]\n", key, value)
  69. }
  70. }