/**
* Singleton
*
* @static
* @return null
*/
public static function singleton()
{
$returnValue = null;
if (is_null(self::$instance)) {
self::$instance = new self();
}
$returnValue = self::$instance;
return $returnValue;
}
/**
* Executes a query on the storage engine. Should be only used for INSERT,
* DELETE statements.
*
* @access public
* @author Jerome Bogaerts, <*****@*****.**>
* @param string statement
* @param array params
* @return int
*/
public function exec($statement, $params = array())
{
$this->debug($statement);
common_Profiler::queryStart();
$returnValue = $this->persistence->exec($statement, $params);
common_Profiler::queryStop($statement, $params);
$this->incrementNrOfQueries();
return (int) $returnValue;
}
/**
* Dispatch the current http request into the control loop:
* 1. Load the ressources
* 2. Start the MVC Loop from the ClearFW
* manage Exception:
*/
public function dispatch()
{
common_Profiler::start('dispatch');
if (!self::$isDispatched) {
$isAjax = tao_helpers_Request::isAjax();
if (tao_helpers_Context::check('APP_MODE')) {
if (!$isAjax) {
$this->scripts();
}
}
//Catch all exceptions
try {
//the app is ready
if ($this->isReady()) {
$this->mvc();
} else {
//the request is not an ajax request, redirect the user to the maintenance page
if (!$isAjax) {
require_once Template::getTemplate('error/maintenance.tpl', 'tao');
//else throw an exception, this exception will be send to the client properly
} else {
throw new common_exception_SystemUnderMaintenance();
}
}
} catch (Exception $e) {
$this->catchError($e);
}
self::$isDispatched = true;
}
common_Profiler::stop('dispatch');
}
