This is the encapsulation of my MVC framework ActionController

This is the encapsulation of my MVC framework ActionController

/*
 * MST_Library v3.1
 * @autohr Janpoem
 */

if (!defined('IN_MST_CORE'))
 exit('MST_ActionController Can't be include single! ');

if (!defined(MST_Core::LITE_MODE)) {
 MST_Core::import(array(
 'MST/ActionController/Request',
 'MST/ActionController/Router',
 ), MST_Core::P_LIB ;
 VIEW = ' view',
 TEXT = 'text',
 ACTION = 'action',
 WIDGET = 'widget',
 CUSTOM_VIEW = 'custom_view';

 private static
 $_request = null,
 $_instance = null,
 $_currentView = null;

 # @todo The processing here should be done after the controller is instantiated, dispatch should have a specific meaning
 final static public function dispatch(array $config = null, $beforeDispatch = null) {
 if (self ::$_instance == null) {
 $request = new MST_ActionController_Request($config['request']);
 $router = new MST_ActionController_Router($config['routes']);
 $router->routing($ request);
 $controller = $request['controller'];
 $controller = MST_String::camelize2($controller) . static::PF_CONTROLLER;
 if ($request['module'] != null) {
 $ module = $request['module'];
 if (strpos($module, '/') !== false)
 $module = str_replace('/', '_', $module);
 $controller = $ module . '_' . $controller;
 }
 if (is_callable($beforeDispatch)) {
 call_user_func_array($beforeDispatch, array($request, & $controller));
 }
 $GLOBALS['DATA_CACHE'][' request'] = & $request;
 if (!class_exists($controller))
 MST_Core::error(202, $controller);
 else
 self::$_instance = new $controller();
 }
 }

 public
 $layout = false,
 $format = 'html',
 $params = null,
 $autoLoadHelper = false;

 protected
 $comet = 0,
 $viewPath = null,
 $defaultRender = self:: VIEW;

 abstract public function application();

 private function __construct()
 {
 if ($this->comet  ob_start();
 $this->params = & $GLOBALS ['DATA_CACHE']['request'];
 $this->viewPath = trim(
 $this->params['module'] . '/' . $this->params['controller'], '/');
 if ($this->application() !== self::NO_RENDER)
 $this->action($this->params['action']);
 }

 public function __destruct() {
 if (!defined(self::IS_RENDER) && self::$_currentView != null) {
 switch ($this->defaultRender) {
 case self::VIEW :
 case self:: TEXT :
 case self::ACTION :
 case self::WIDGET :
 #$this->defaultRender = $mode;
 break;
 default :
 $this->defaultRender = self::VIEW;
 }
 $this->render(
 $this->defaultRender,
 self::$_currentView
 );
 }
 if (self::$_instance != null)
 self::$_instance = null;
 if ( self::$_request != null)
 self::$_request = null;
 }

 protected function action($action) {
 $name = MST_String::camelize($action);
 $actName = $name . self::PF_ACTION;
 if (!method_exists($this, $actName))
 MST_Core::error(203, $actName);
 $actRef = new ReflectionMethod($this, $actName);
 if ($actRef- >isPrivate() || $actRef->isProtected()
 && !constant(MST_ActionController_Router::IS_MAP))
 MST_Core::error(203, $actName);
 if ($this->$actName() !== self::NO_RENDER && self::$_currentView == null)
 self::$_currentView = $action;
 return $this;
 }

 /**
 * Output, url jump
*/
 protected function redirect($ url) {
 if (defined(self::IS_RENDER)) return self::NO_RENDER;
 define(self::IS_RENDER, true);
 header('Location:'.linkUri($url));
 return $this ;
 }

 // render XML
 // render JAVASCRIPT
 protected function render(
 $mode = null,
 $content = null,
 array $options = null)
 {
 if (defined(self::IS_RENDER) ) return self::NO_RENDER;
 define(self::IS_RENDER, true);
 if ($mode == null) $mode = $this->defaultRender;
 if ($mode == self::VIEW)
 $content = $this->viewPath . '/' . $content;
 MST_ActionView::instance()
 ->assign($this)
 ->setOptions($options)
 ->render($mode , $content);
 return $this;
 }

	protected function customRender($file, $path, array $options = null) {
		return $this->render(self::CUSTOM_VIEW, array($file, $path), $options);
	}

	protected function setView($val) {
		self::$_currentView = $val;
	}

	protected function setViewOption($key, $val) {
		MST_ActionView::instance()->setOption($key, $val);
		return $this;
	}

	protected function getViewOption($key) {
		return MST_ActionView::instance()->getOption($key);
	}

	protected function setViewOptions(array $options) {
		MST_ActionView::instance()->setOptions($options);
		return $this;
	}

	protected function getViewOptions() {
		return MST_ActionView::instance()->getOptions();
	}

	protected function doComet(Closure $fn) {
		$times = 0;
		set_time_limit(0);
		while(true) {
			ob_flush();
			flush();
			$times++;
			$result = call_user_func($fn, $times, $this);
			if ($result === false) {
				break;
			}
			usleep(10000);
			sleep($this->comet);
		}
	}
}