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package db
import (
"fmt"
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/errors"
"github.com/syndtr/goleveldb/leveldb/opt"
"path"
)
type LevelDB struct {
db *leveldb.DB
}
func NewLevelDB(name string) (*LevelDB, error) {
dbPath := path.Join(name)
db, err := leveldb.OpenFile(dbPath, nil)
if err != nil {
return nil, err
}
database := &LevelDB{db: db}
return database, nil
}
func (db *LevelDB) Get(key []byte) []byte {
res, err := db.db.Get(key, nil)
if err != nil {
if err == errors.ErrNotFound {
return nil
} else {
panic(err)
}
}
return res
}
func (db *LevelDB) Set(key []byte, value []byte) {
err := db.db.Put(key, value, nil)
if err != nil {
panic(err)
}
}
func (db *LevelDB) SetSync(key []byte, value []byte) {
err := db.db.Put(key, value, &opt.WriteOptions{Sync: true})
if err != nil {
panic(err)
}
}
func (db *LevelDB) Delete(key []byte) {
err := db.db.Delete(key, nil)
if err != nil {
panic(err)
}
}
func (db *LevelDB) DeleteSync(key []byte) {
err := db.db.Delete(key, &opt.WriteOptions{Sync: true})
if err != nil {
panic(err)
}
}
func (db *LevelDB) DB() *leveldb.DB {
return db.db
}
func (db *LevelDB) Close() {
db.db.Close()
}
func (db *LevelDB) Print() {
iter := db.db.NewIterator(nil, nil)
for iter.Next() {
key := iter.Key()
value := iter.Value()
fmt.Printf("[%X]:\t[%X]\n", key, value)
}
}