itstructure / yii2-template-simple

    /**

     * Helper method to commit a transaction.

     */

    private function commit()

    {

        if ($this->inTransaction) {

            try {

                // commit read-write transaction which also releases the lock

                if ('sqlite' === $this->driver) {

                    $this->pdo->exec('COMMIT');

                } else {

                    $this->pdo->commit();

                }

                $this->inTransaction = false;

            } catch (\PDOException $e) {

                $this->rollback();

                throw $e;

            }

        }

    }

    /**

     * Helper method to rollback a transaction.

    /**

     * Helper method to rollback a transaction.

     */

    private function rollback()

    {

        // We only need to rollback if we are in a transaction. Otherwise the resulting

        // error would hide the real problem why rollback was called. We might not be

        // in a transaction when not using the transactional locking behavior or when

        // two callbacks (e.g. destroy and write) are invoked that both fail.

        if ($this->inTransaction) {

            if ('sqlite' === $this->driver) {

                $this->pdo->exec('ROLLBACK');

            } else {

                $this->pdo->rollBack();

            }

            $this->inTransaction = false;

        }

    }

    /**

     * Reads the session data in respect to the different locking strategies.