gorush/vendor/github.com/asdine/storm/transaction.go

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package storm
import "github.com/boltdb/bolt"
// 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
}