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<?php |
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/** |
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* @license LGPLv3, http://opensource.org/licenses/LGPL-3.0 |
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* @copyright Metaways Infosystems GmbH, 2011 |
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* @copyright Aimeos (aimeos.org), 2015-2016 |
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* @package MW |
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* @subpackage DB |
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*/ |
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namespace Aimeos\MW\DB\Connection; |
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/** |
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* Database connection class for \PDO connections. |
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* |
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* @package MW |
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* @subpackage DB |
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*/ |
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class PDO extends \Aimeos\MW\DB\Connection\Base implements \Aimeos\MW\DB\Connection\Iface |
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{ |
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private $connection; |
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private $txnumber = 0; |
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private $stmts = array(); |
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/** |
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* Initializes the PDO connection object. |
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* |
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* @param array $params Associative list of connection parameters |
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* @param string[] $stmts List of SQL statements to execute after connecting |
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*/ |
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public function __construct( array $params, array $stmts ) |
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{ |
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parent::__construct( $params ); |
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$this->stmts = $stmts; |
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$this->connect(); |
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} |
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/** |
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* Connects (or reconnects) to the database server |
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* |
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* @return \Aimeos\MW\DB\Connection\Iface Connection instance for method chaining |
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*/ |
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public function connect() |
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{ |
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unset( $this->connection ); |
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list( $dsn, $user, $pass, $attr ) = $this->getParameters(); |
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$pdo = new \PDO( $dsn, $user, $pass, $attr ); |
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$pdo->setAttribute( \PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION ); |
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$this->connection = $pdo; |
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$this->txnumber = 0; |
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foreach( $this->stmts as $stmt ) { |
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$this->create( $stmt )->execute()->finish(); |
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} |
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return $this; |
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} |
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/** |
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* Creates a \PDO database statement. |
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* |
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* @param string $sql SQL statement, maybe with place holders |
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* @param integer $type Simple or prepared statement type constant from abstract class |
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* @return \Aimeos\MW\DB\Statement\Iface \PDO statement object |
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* @throws \Aimeos\MW\DB\Exception if type is invalid or the \PDO object throws an exception |
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*/ |
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public function create( $sql, $type = \Aimeos\MW\DB\Connection\Base::TYPE_SIMPLE ) |
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{ |
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try { |
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switch( $type ) |
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{ |
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case \Aimeos\MW\DB\Connection\Base::TYPE_SIMPLE: |
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return new \Aimeos\MW\DB\Statement\PDO\Simple( $this, $sql ); |
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case \Aimeos\MW\DB\Connection\Base::TYPE_PREP: |
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return new \Aimeos\MW\DB\Statement\PDO\Prepared( $this, $sql ); |
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default: |
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throw new \Aimeos\MW\DB\Exception( sprintf( 'Invalid value "%1$d" for statement type', $type ) ); |
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} |
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} catch( \PDOException $e ) { |
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throw new \Aimeos\MW\DB\Exception($e->getMessage(), $e->getCode(), $e->errorInfo ); |
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} |
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} |
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/** |
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* Returns the underlying connection object |
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* |
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* @return \PDO Underlying connection object |
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*/ |
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public function getRawObject() |
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{ |
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return $this->connection; |
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} |
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/** |
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* Checks if a transaction is currently running |
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* |
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* @return boolean True if transaction is currently running, false if not |
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*/ |
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public function inTransaction() |
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{ |
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if( $this->txnumber > 0 ) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Starts a transaction for this connection. |
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* Transactions can't be nested and a new transaction can only be started |
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* if the previous transaction was committed or rolled back before. |
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*/ |
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public function begin() |
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{ |
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if( $this->txnumber++ === 0 ) |
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{ |
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if( $this->connection->beginTransaction() === false ) { |
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throw new \Aimeos\MW\DB\Exception( 'Unable to start new transaction' ); |
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} |
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} |
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} |
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/** |
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* Commits the changes done inside of the transaction to the storage. |
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*/ |
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public function commit() |
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{ |
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if( --$this->txnumber === 0 ) |
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{ |
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if( $this->connection->commit() === false ) { |
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throw new \Aimeos\MW\DB\Exception( 'Failed to commit transaction' ); |
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} |
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} |
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} |
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/** |
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* Discards the changes done inside of the transaction. |
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*/ |
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public function rollback() |
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{ |
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try |
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{ |
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if( --$this->txnumber === 0 ) |
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{ |
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if( $this->connection->rollBack() === false ) { |
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throw new \Aimeos\MW\DB\Exception( 'Failed to roll back transaction' ); |
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} |
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} |
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} |
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catch( \PDOException $e ) |
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{ |
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throw new \Aimeos\MW\DB\Exception( $e->getMessage(), $e->getCode(), $e->errorInfo ); |
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} |
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} |
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} |
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aimeos /
aimeos-core
