* Private constructor to prevent instantiation of this utility class.
     */
    private BufferCache() {
        // Utility class - not instantiable
    }

    private static final int MAX_BUFFERS = Config.getInt("jcifs.smb1.smb.maxBuffers", 16);
    private static final int MAX_BUFFER_SIZE = 0x100000; // 1MB maximum

    // Use concurrent queue for lock-free operations

   * forward to this implementation.
   */
  protected @Nullable Entry<K, V> standardFirstEntry() {
    return Iterables.<@Nullable Entry<K, V>>getFirst(entrySet(), null);
  }

  /**
   * A sensible definition of {@link #firstKey} in terms of {@code firstEntry}. If you override
   * {@code firstEntry}, you may wish to override {@code firstKey} to forward to this

   * forward to this implementation.
   */
  protected @Nullable Entry<K, V> standardFirstEntry() {
    return Iterables.<@Nullable Entry<K, V>>getFirst(entrySet(), null);
  }

  /**
   * A sensible definition of {@link #firstKey} in terms of {@code firstEntry}. If you override
   * {@code firstEntry}, you may wish to override {@code firstKey} to forward to this

                    appendJson("search-field", searchFieldMap, buf).append(',');
                    final Map<String, List<String>> requestHeaderMap = entity.getRequestHeaderList()
                            .stream()

                }
            }
        }

        if (repository.getProxy() != null && logger.isDebugEnabled()) {
            logger.debug("Using proxy " + repository.getProxy().getHost() + ":"
                    + repository.getProxy().getPort() + " for " + repository.getUrl());
        }

        if (repository.getAuthentication() != null && repository.getProxy() != null) {
            wagon.connect(

                            null,
                            "must be unique but found duplicate proxy with id " + proxy.getId());
                }
                validateStringNotEmpty(problems, "proxies.proxy.host", proxy.getHost(), proxy.getId());
            }
        }
    }

    private void validateRepositories(SettingsProblemCollector problems, List<Repository> repositories, String prefix) {

            String scrollId = response.getScrollId();
            try {
                while (scrollId != null) {
                    final SearchHit[] hits = response.getHits().getHits();
                    if (hits.length == 0) {
                        break;
                    }

                    final BulkRequestBuilder bulkRequestBuilder = client.prepareBulk();

        StreamUtil.stream(groupsAndRoles.getFirst()).of(stream -> stream.forEach(groupList::add));
        StreamUtil.stream(groupsAndRoles.getSecond()).of(stream -> stream.forEach(roleList::add));
        if (logger.isDebugEnabled()) {
            logger.debug("[processParentGroup] Completed for id: {}, depth: {}, added groups: {}, added roles: {}", id, depth,
                    groupsAndRoles.getFirst().length, groupsAndRoles.getSecond().length);

            }
            return new Pair<>(k, v);
        }).forEach(e -> {
            if (buf.length() > 0) {
                buf.append('\n');
            }
            buf.append(e.getFirst());
            buf.append('=');
            buf.append(e.getSecond());
        });
        return buf.toString();
    }

    /**
     * Loads configuration parameters into a map.
     *

     */
    public List<CrawlingInfoParam> getLastCrawlingInfoParamList(final String sessionId) {
        final CrawlingInfo crawlingInfo = getLast(sessionId);
        if (crawlingInfo == null) {
            return Collections.emptyList();
        }
        final FessConfig fessConfig = ComponentUtil.getFessConfig();