/**
  * Indexes a discussion on a document..
  *
  * @param int $docid
  * @return boolean
  */
 protected function indexDiscussion($docid)
 {
     try {
         $discussion = Indexer::getDiscussionText($docid);
         if (empty($discussion)) {
             return true;
         }
         return $this->lucene->updateDiscussion($docid, $discussion);
     } catch (Exception $e) {
         return false;
     }
     return true;
 }