code: protected function getLockFile()
  	{
  		$request = $this->getRequest();
  		$params = $request->getParams();
  		$controller = $params->controller;
  		$action = $params->action;
  
  		$normalizedController = strtolower(stripslashes(str_replace(__NAMESPACE__, '', $controller)));
  
  		$fileBaseName = implode('_', array(
  			basename($request->getScriptName()),
  			$normalizedController,
  			$action
  		));
  
  		return $this->lockdir . DIRECTORY_SEPARATOR . $fileBaseName . self::FILE_SUFFIX;
  	}
docs: Gets the Path to the lock file
  
  @return string