public List<Tweet> listAllTweet() {
   return crudDAO.findWithNamedQuery(Tweet.ALL_ORDER_BY_DATE_DESC);
 }
 public List<Tweet> findTweetByKeyword(String keyword) {
   return crudDAO.findWithNamedQuery(
       Tweet.FIND_BY_KEYWORD, QueryParameters.with("keyword", "%" + keyword + "%").parameters());
 }