/**
  * Constructor.
  *
  * Initializes request, response, and dispatcher.
  *
  */
 public function __construct()
 {
     $this->dispatcher = GeneralUtility::makeInstance('ApacheSolrForTypo3\\Solr\\IndexQueue\\FrontendHelper\\Dispatcher');
     $this->request = GeneralUtility::makeInstance('ApacheSolrForTypo3\\Solr\\IndexQueue\\PageIndexerRequest', $_SERVER['HTTP_X_TX_SOLR_IQ']);
     $this->response = GeneralUtility::makeInstance('ApacheSolrForTypo3\\Solr\\IndexQueue\\PageIndexerResponse');
     $this->response->setRequestId($this->request->getRequestId());
 }