forked from mirror/ledisdb
44 lines
763 B
Go
44 lines
763 B
Go
// +build !windows
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package mdb
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import (
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"github.com/siddontang/ledisdb/store/driver"
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mdb "github.com/szferi/gomdb"
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)
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type Snapshot struct {
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db mdb.DBI
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tx *mdb.Txn
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}
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func newSnapshot(db MDB) (*Snapshot, error) {
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tx, err := db.env.BeginTxn(nil, mdb.RDONLY)
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if err != nil {
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return nil, err
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}
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return &Snapshot{db.db, tx}, nil
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}
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func (s *Snapshot) Get(key []byte) ([]byte, error) {
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v, err := s.tx.Get(s.db, key)
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if err == mdb.NotFound {
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return nil, nil
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}
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return v, err
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}
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func (s *Snapshot) NewIterator() driver.IIterator {
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c, err := s.tx.CursorOpen(s.db)
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if err != nil {
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return &MDBIterator{nil, nil, nil, nil, false, err, false}
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}
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return &MDBIterator{nil, nil, c, s.tx, true, nil, false}
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}
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func (s *Snapshot) Close() {
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s.tx.Commit()
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}
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