Zend FR

    /**
     * Set the dispatcher object.  The dispatcher is responsible for
     * taking a Zend_Controller_Dispatcher_Token object, instantiating the controller, and
     * call the action method of the controller.
     *
     * @param string|Zend_Controller_Dispatcher_Interface $dispatcher
     * @return Zend_Controller_Front
     */
    public function setDispatcher($dispatcher)
    {
        if (is_string($dispatcher)) {
            Zend_Loader::loadClass($dispatcher);
            $dispatcher = new $dispatcher();
        }
        if (!$dispatcher instanceof Zend_Controller_Dispatcher_Interface) {
            throw new Zend_Controller_Exception('Invalid dispatcher class');
        }

        $this->_dispatcher = $dispatcher;
        return $this;
    }