// Begin begins a transaction and calls f to complete it . // If f returns an error and IsNetErr(error) == true it reconnects and calls // f up to MaxRetries times. If error is of type *mysql.Error it tries rollback // the transaction. func (c *Conn) Begin(f func(mysql.Transaction, ...interface{}) error, args ...interface{}) error { err := c.connectIfNotConnected() if err != nil { return err } nn := 0 for { var tr mysql.Transaction if tr, err = c.Raw.Begin(); err == nil { if err = f(tr, args...); err == nil { return nil } } if c.reconnectIfNetErr(&nn, &err); err != nil { if _, ok := err.(*mysql.Error); ok && tr.IsValid() { tr.Rollback() } return err } } panic(nil) }