package storm import "github.com/coreos/bbolt" // Tx is a transaction. type Tx interface { // Commit writes all changes to disk. Commit() error // Rollback closes the transaction and ignores all previous updates. Rollback() error } // Begin starts a new transaction. func (n node) Begin(writable bool) (Node, error) { var err error n.tx, err = n.s.Bolt.Begin(writable) if err != nil { return nil, err } return &n, nil } // Rollback closes the transaction and ignores all previous updates. func (n *node) Rollback() error { if n.tx == nil { return ErrNotInTransaction } err := n.tx.Rollback() if err == bolt.ErrTxClosed { return ErrNotInTransaction } return err } // Commit writes all changes to disk. func (n *node) Commit() error { if n.tx == nil { return ErrNotInTransaction } err := n.tx.Commit() if err == bolt.ErrTxClosed { return ErrNotInTransaction } return err }