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132 lines
2.4 KiB
132 lines
2.4 KiB
// +build gcc
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package db
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import (
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"fmt"
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"path"
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"github.com/jmhodges/levigo"
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. "github.com/tendermint/go-common"
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)
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func init() {
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registerDBCreator(CLevelDBBackendStr, func(name string, dir string) (DB, error) {
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return NewCLevelDB(name, dir)
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}, false)
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}
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type CLevelDB struct {
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db *levigo.DB
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ro *levigo.ReadOptions
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wo *levigo.WriteOptions
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woSync *levigo.WriteOptions
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}
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func NewCLevelDB(name string, dir string) (*CLevelDB, error) {
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dbPath := path.Join(dir, name+".db")
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opts := levigo.NewOptions()
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opts.SetCache(levigo.NewLRUCache(1 << 30))
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opts.SetCreateIfMissing(true)
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db, err := levigo.Open(dbPath, opts)
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if err != nil {
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return nil, err
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}
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ro := levigo.NewReadOptions()
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wo := levigo.NewWriteOptions()
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woSync := levigo.NewWriteOptions()
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woSync.SetSync(true)
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database := &CLevelDB{
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db: db,
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ro: ro,
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wo: wo,
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woSync: woSync,
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}
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return database, nil
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}
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func (db *CLevelDB) Get(key []byte) []byte {
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res, err := db.db.Get(db.ro, key)
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if err != nil {
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PanicCrisis(err)
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}
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return res
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}
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func (db *CLevelDB) Set(key []byte, value []byte) {
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err := db.db.Put(db.wo, key, value)
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if err != nil {
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PanicCrisis(err)
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}
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}
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func (db *CLevelDB) SetSync(key []byte, value []byte) {
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err := db.db.Put(db.woSync, key, value)
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if err != nil {
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PanicCrisis(err)
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}
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}
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func (db *CLevelDB) Delete(key []byte) {
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err := db.db.Delete(db.wo, key)
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if err != nil {
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PanicCrisis(err)
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}
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}
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func (db *CLevelDB) DeleteSync(key []byte) {
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err := db.db.Delete(db.woSync, key)
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if err != nil {
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PanicCrisis(err)
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}
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}
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func (db *CLevelDB) DB() *levigo.DB {
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return db.db
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}
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func (db *CLevelDB) Close() {
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db.db.Close()
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db.ro.Close()
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db.wo.Close()
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db.woSync.Close()
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}
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func (db *CLevelDB) Print() {
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iter := db.db.NewIterator(db.ro)
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defer iter.Close()
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for iter.Seek(nil); iter.Valid(); iter.Next() {
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key := iter.Key()
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value := iter.Value()
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fmt.Printf("[%X]:\t[%X]\n", key, value)
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}
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}
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func (db *CLevelDB) NewBatch() Batch {
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batch := levigo.NewWriteBatch()
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return &cLevelDBBatch{db, batch}
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}
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//--------------------------------------------------------------------------------
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type cLevelDBBatch struct {
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db *CLevelDB
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batch *levigo.WriteBatch
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}
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func (mBatch *cLevelDBBatch) Set(key, value []byte) {
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mBatch.batch.Put(key, value)
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}
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func (mBatch *cLevelDBBatch) Delete(key []byte) {
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mBatch.batch.Delete(key)
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}
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func (mBatch *cLevelDBBatch) Write() {
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err := mBatch.db.db.Write(mBatch.db.wo, mBatch.batch)
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if err != nil {
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PanicCrisis(err)
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}
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}
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