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Re-use the database connection

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This commit is contained in:
kaetemi 2014-09-02 20:39:07 +02:00
parent 6acf67d03b
commit 6fed8bad5b
1 changed files with 261 additions and 268 deletions
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39
code/web/private_php/ams/autoload/dblayer.php
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@ -28,6 +28,9 @@
* @author Daan Janssens, mentored by Matthew Lagoe * @author Daan Janssens, mentored by Matthew Lagoe
* *
*/ */
$PDOCache = array();
class DBLayer { class DBLayer {
private $PDO; private $PDO;
@ -42,10 +45,12 @@ class DBLayer {
* @param $db String, the name of the databases entry in the $cfg global var. * @param $db String, the name of the databases entry in the $cfg global var.
* @param $dbn String, the name of the databases entry in the $cfg global var if $db referenced to an action(install etc). * @param $dbn String, the name of the databases entry in the $cfg global var if $db referenced to an action(install etc).
*/ */
function __construct( $db, $dbn = null ) function __construct($db, $dbn = null)
{ {
if ( $db != "install" ) { global $PDOCache;
if (isset($PDOCache[$db])) {
$this->PDO = $PDOCache[$db];
} else {
global $cfg; global $cfg;
$dsn = "mysql:"; $dsn = "mysql:";
$dsn .= "host=" . $cfg['db'][$db]['host'] . ";"; $dsn .= "host=" . $cfg['db'][$db]['host'] . ";";
@ -53,23 +58,12 @@ class DBLayer {
$dsn .= "port=" . $cfg['db'][$db]['port'] . ";"; $dsn .= "port=" . $cfg['db'][$db]['port'] . ";";
$opt = array( $opt = array(
PDO :: ATTR_ERRMODE => PDO :: ERRMODE_EXCEPTION, PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO :: ATTR_DEFAULT_FETCH_MODE => PDO :: FETCH_ASSOC PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
); );
$this -> PDO = new PDO( $dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt ); $this->PDO = new PDO($dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt);
} else { $PDOCache[$db] = $this->PDO;
global $cfg;
$dsn = "mysql:";
$dsn .= "host=" . $cfg['db'][$dbn]['host'] . ";";
$dsn .= "port=" . $cfg['db'][$dbn]['port'] . ";";
$opt = array(
PDO :: ATTR_ERRMODE => PDO :: ERRMODE_EXCEPTION,
PDO :: ATTR_DEFAULT_FETCH_MODE => PDO :: FETCH_ASSOC
);
$this -> PDO = new PDO( $dsn, $_POST['Username'], $_POST['Password'], $opt );
} }
} }
/** /**
@ -78,9 +72,9 @@ class DBLayer {
* @param $query the mysql query. * @param $query the mysql query.
* @return returns a PDOStatement object. * @return returns a PDOStatement object.
*/ */
public function executeWithoutParams( $query ) { public function executeWithoutParams($query) {
$statement = $this -> PDO -> prepare( $query ); $statement = $this->PDO->prepare($query);
$statement -> execute(); $statement->execute();
return $statement; return $statement;
} }
@ -145,8 +139,7 @@ class DBLayer {
$sth -> execute( $data ); $sth -> execute( $data );
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch( Exception $e ) catch ( Exception $e ) {
{
$this -> PDO -> rollBack(); $this -> PDO -> rollBack();
throw new Exception( "error selection" ); throw new Exception( "error selection" );
return false; return false;