/**
* @brief Return a pooled connection for the connectionstring
*
* @param mixed $connectionstring The connectionstring to request
* @return DatabaseDriver the database driver
*/
public static function getPooledConnection($connectionstring)
{
$csh = md5(serialize($connectionstring));
if (!arr::hasKey(self::$pool, $csh)) {
$driverclass = DatabaseDriver::getDriverClass($connectionstring['driver']);
self::$pool[$csh] = array('instance' => new $driverclass($connectionstring), 'count' => 0);
self::$pool[$csh]['instance']->setPoolIdentity($csh);
}
self::$pool[$csh]['count']++;
return self::$pool[$csh]['instance'];
}
