mirror of https://github.com/friendica/friendica
98 lines
1.9 KiB
PHP
98 lines
1.9 KiB
PHP
<?php
|
|
|
|
namespace Friendica\Test\Util\Database;
|
|
|
|
use PDO;
|
|
use PDOException;
|
|
|
|
/**
|
|
* This class extends native PDO one but allow nested transactions
|
|
* by using the SQL statements `SAVEPOINT', 'RELEASE SAVEPOINT' AND 'ROLLBACK SAVEPOINT'
|
|
*/
|
|
class ExtendedPDO extends PDO
|
|
{
|
|
/**
|
|
* @var array Database drivers that support SAVEPOINT * statements.
|
|
*/
|
|
protected static $_supportedDrivers = array("pgsql", "mysql");
|
|
|
|
/**
|
|
* @var int the current transaction depth
|
|
*/
|
|
protected $_transactionDepth = 0;
|
|
|
|
/**
|
|
* @return int
|
|
*/
|
|
public function getTransactionDepth()
|
|
{
|
|
return $this->_transactionDepth;
|
|
}
|
|
|
|
/**
|
|
* Test if database driver support savepoints
|
|
*
|
|
* @return bool
|
|
*/
|
|
protected function hasSavepoint()
|
|
{
|
|
return in_array($this->getAttribute(PDO::ATTR_DRIVER_NAME),
|
|
self::$_supportedDrivers);
|
|
}
|
|
|
|
|
|
/**
|
|
* Start transaction
|
|
*
|
|
* @return bool|void
|
|
*/
|
|
public function beginTransaction()
|
|
{
|
|
if($this->_transactionDepth == 0 || !$this->hasSavepoint()) {
|
|
parent::beginTransaction();
|
|
} else {
|
|
$this->exec("SAVEPOINT LEVEL{$this->_transactionDepth}");
|
|
}
|
|
|
|
$this->_transactionDepth++;
|
|
}
|
|
|
|
/**
|
|
* Commit current transaction
|
|
*
|
|
* @return bool|void
|
|
*/
|
|
public function commit()
|
|
{
|
|
$this->_transactionDepth--;
|
|
|
|
if($this->_transactionDepth == 0 || !$this->hasSavepoint()) {
|
|
parent::commit();
|
|
} else {
|
|
$this->exec("RELEASE SAVEPOINT LEVEL{$this->_transactionDepth}");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Rollback current transaction,
|
|
*
|
|
* @throws PDOException if there is no transaction started
|
|
* @return bool|void
|
|
*/
|
|
public function rollBack()
|
|
{
|
|
|
|
if ($this->_transactionDepth == 0) {
|
|
throw new PDOException('Rollback error : There is no transaction started');
|
|
}
|
|
|
|
$this->_transactionDepth--;
|
|
|
|
if($this->_transactionDepth == 0 || !$this->hasSavepoint()) {
|
|
parent::rollBack();
|
|
} else {
|
|
$this->exec("ROLLBACK TO SAVEPOINT LEVEL{$this->_transactionDepth}");
|
|
}
|
|
}
|
|
}
|