dataHelper.clearUrlQueueList();
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.service.UrlQueueService#offerAll(java.lang.String,
     * java.util.List)
     */
    @Override
    public void offerAll(final String sessionId, final List<UrlQueueImpl<Long>> newUrlQueueList) {
        final Queue<UrlQueueImpl<Long>> urlQueueList = dataHelper.getUrlQueueList(sessionId);

                crawlerContext.decrementAndGetAccessCount();
                final List<UrlQueue<?>> newUrlQueueList = new ArrayList<>();
                newUrlQueueList.add(urlQueue);
                urlQueueService.offerAll(crawlerContext.getSessionId(), newUrlQueueList);
            }
        } else if (logger.isDebugEnabled()) {
            logger.debug("Visited urlQueue: {}", urlQueue);
        }
    }

   * {@link Ordering#leastOf(Iterable, int)}, which provides a simpler API for that use case.
   */
  public void offerAll(Iterable<? extends T> elements) {
    offerAll(elements.iterator());
  }

  /**
   * Adds each member of {@code elements} as a candidate for the top {@code k} elements. This

                    uq.setUrl(d.getUrl());
                    uq.setMetaData(d.getMetaData());
                    return uq;
                }).collect(Collectors.toList());
        urlQueueService.offerAll(crawlerContext.sessionId, childList);
    }

    protected void storeChildUrl(final String childUrl, final String parentUrl, final String metaData, final int depth) {

    void add(String sessionId, String url);

    void insert(QUEUE urlQueue);

    void delete(String sessionId);

    void deleteAll();

    void offerAll(String sessionId, List<QUEUE> newUrlQueueList);

    QUEUE poll(String sessionId);

    void saveSession(String sessionId);

    boolean visited(QUEUE urlQueue);

            }
            throw e;
        }
    }

    @Override
    public void delete(final String sessionId) {
        deleteBySessionId(sessionId);
    }

    @Override
    public void offerAll(final String sessionId, final List<OpenSearchUrlQueue> urlQueueList) {
        if (logger.isDebugEnabled()) {
            logger.debug("Offering URL: Session ID: {}, UrlQueue: {}", sessionId, urlQueueList);
        }

        list.subList(k, list.size()).clear();
      }
      list.trimToSize();
      return unmodifiableList(list);
    } else {
      TopKSelector<E> selector = TopKSelector.least(k, this);
      selector.offerAll(iterator);
      return selector.topK();
    }
  }

  /**
   * Returns the {@code k} greatest elements of the given iterable according to this ordering, in

        list.subList(k, list.size()).clear();
      }
      list.trimToSize();
      return unmodifiableList(list);
    } else {
      TopKSelector<E> selector = TopKSelector.least(k, this);
      selector.offerAll(iterator);
      return selector.topK();
    }
  }

  /**
   * Returns the {@code k} greatest elements of the given iterable according to this ordering, in