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64 lines
1.2 KiB
64 lines
1.2 KiB
package db
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import . "github.com/tendermint/tmlibs/common"
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type DB interface {
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Get([]byte) []byte
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Set([]byte, []byte)
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SetSync([]byte, []byte)
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Delete([]byte)
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DeleteSync([]byte)
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Close()
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NewBatch() Batch
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Iterator() Iterator
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IteratorPrefix([]byte) Iterator
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// For debugging
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Print()
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Stats() map[string]string
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}
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type Batch interface {
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Set(key, value []byte)
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Delete(key []byte)
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Write()
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}
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type Iterator interface {
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Next() bool
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Key() []byte
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Value() []byte
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Release()
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Error() error
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}
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//-----------------------------------------------------------------------------
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const (
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LevelDBBackendStr = "leveldb" // legacy, defaults to goleveldb.
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CLevelDBBackendStr = "cleveldb"
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GoLevelDBBackendStr = "goleveldb"
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MemDBBackendStr = "memdb"
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)
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type dbCreator func(name string, dir string) (DB, error)
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var backends = map[string]dbCreator{}
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func registerDBCreator(backend string, creator dbCreator, force bool) {
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_, ok := backends[backend]
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if !force && ok {
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return
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}
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backends[backend] = creator
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}
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func NewDB(name string, backend string, dir string) DB {
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db, err := backends[backend](name, dir)
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if err != nil {
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PanicSanity(Fmt("Error initializing DB: %v", err))
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}
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return db
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}
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