/**
* Create's and return's the singleton instance.
*
* @return \AppserverIo\Appserver\ServletEngine\Utils\ErrorUtil The singleton instance
*/
public static function singleton()
{
// query whether or not the instance has already been created
if (ErrorUtil::$instance == null) {
ErrorUtil::$instance = new ErrorUtil();
}
// return the singleton instance
return ErrorUtil::$instance;
}
/**
* Does shutdown logic for request handler if something went wrong and
* produces a fatal error for example.
*
* @return void
*/
public function shutdown()
{
// create a local copy of the request/response
$servletRequest = $this->servletRequest;
$servletResponse = $this->servletResponse;
// check if we had a fatal error that caused the shutdown
if ($lastError = error_get_last()) {
// add the fatal error
$this->addError(ErrorUtil::singleton()->fromArray($lastError));
// in case of fatal errors, we need to override request with perpared
// instances because error handling needs application access
$servletRequest = RequestHandler::$requestContext;
}
// handle the errors if necessary
ErrorUtil::singleton()->handleErrors($this, $servletRequest, $servletResponse);
// copy request/response back to the thread context
$this->servletRequest = $servletRequest;
$this->servletResponse = $servletResponse;
}
