Call method from (custom) controller class in Magento - magento

Question

I'm working with the M2e extension for Magento. Now I want to call a method of the class Ess_M2ePro_Adminhtml_ListingController in the file app/code/community/Ess/M2ePro/controllers/Adminhtml/ListingController.php.
But I don't know, how. I can't create an object or model to get access to the class to use the methods. Maybe it's not a good idea to call this controller methods directly, but in my case (remove a associated magento product to an ebay listing) it's required to call this methods.
In general these actions are called from the magento backend. I've also tried to create an admin_html session, but at the moment I don't have any further ideas.
Here's an example, how it looks like. I'm working with regular PHP-code, nothing special:
class Ess_M2ePro_Adminhtml_ListingController extends Ess_M2ePro_Controller_Adminhtml_MainController
{
//#############################################
protected function _initAction()
{
/** removed **/
}
protected function _isAllowed()
{
return Mage::getSingleton('admin/session')->isAllowed('m2epro/listings/listing');
}
//#############################################
public function indexAction()
{
/** removed **/
}
//#############################################
public function searchAction()
{
/** removed **/
}
public function searchGridAction()
{
/** removed **/
}
public function lockListingNowAction()
{
$listingId = (int)$this->getRequest()->getParam('id');
$component = $this->getRequest()->getParam('component');
$lockItemParams = array(
'id' => $listingId,
'component' => $component
);
$lockItem = Mage::getModel('M2ePro/Listing_LockItem',$lockItemParams);
if (!$lockItem->isExist()) {
$lockItem->create();
}
exit();
}
}
And I'm looking for something like this:
$test = Mage::getModel('M2ePro/Ess_M2ePro_Adminhtml_ListingController')->lockListingNowAction();

Answer 1

You shouldn't call methods from an other controller. Specially in your case, when you have exit at the end of the method.
You can use the _forward method if you are in a controller:
$this->_forward($action = 'lockListingNowAction', $controller = 'adminhtml_listing', $module = 'M2ePro', $params = array('id'=>$id)) //controller name may be different
But the cleanest way is to have the code you need in a helper and call the code from that helper in both controllers.