/** List of registered crawler client factories */
    protected List<CrawlerClientFactory> clientFactoryList = new LinkedList<>();

    /**
     * The maximum size of the client factory list.
     */
    protected int maxClientFactorySize = 10000;

    /**
     * Registers a CrawlerClientFactory with this creator.
     * All existing client mappings will be loaded into the new factory.

   * SetView#maxSize()} of {@code max}.
   */
  private static SetView<Integer> setSizeRange(int min, int max) {
    checkArgument(min >= 0 && max >= min);
    SetView<Integer> set = difference(setSize(max), setSize(max - min));
    checkState(set.minSize() == min && set.maxSize() == max);
    return set;
  }

  /**

      if (AnnotatedElement.class.isAssignableFrom(TypeVariable.class)) {
        if (new TypeCapture<Entry<String, int[][]>>() {}.capture()
            .toString()
            .contains("java.util.Map.java.util.Map")) {
          CURRENT = JAVA8;
        } else {
          CURRENT = JAVA9;
        }
      } else if (new TypeCapture<int[]>() {}.capture() instanceof Class) {
        CURRENT = JAVA7;
      } else {
        CURRENT = JAVA6;

    /**
     * Event severity levels
     */
    public enum Severity {
        INFO(0), WARNING(1), ERROR(2), CRITICAL(3);

        private final int level;

        Severity(int level) {
            this.level = level;
        }

        public int getLevel() {
            return level;
        }
    }

    private static class SingletonHolder {

    protected Map<String, QueueHolder> sessionCache = new ConcurrentHashMap<>();

    /**
     * The number of URLs to fetch when polling.
     */
    protected int pollingFetchSize = 1000;

    /**
     * The maximum size of the crawling queue.
     */
    protected int maxCrawlingQueueSize = 100;

    /**
     * Creates a new instance of OpenSearchUrlQueueService.
     * @param crawlerConfig The crawler configuration.
     */

     *
     * @return the HTTP status code.
     */
    public int getHttpStatusCode() {
        return httpStatusCode;
    }

    /**
     * Sets the HTTP status code for the response.
     *
     * @param httpStatusCode the HTTP status code to set.
     */
    public void setHttpStatusCode(final int httpStatusCode) {
        this.httpStatusCode = httpStatusCode;
    }

    /**

        LogStream.setInstance(testStream);

        final LogStream[] instances = new LogStream[10];
        Thread[] threads = new Thread[10];

        for (int i = 0; i < threads.length; i++) {
            final int index = i;
            threads[i] = new Thread(() -> {
                instances[index] = LogStream.getInstance();
            });
            threads[i].start();
        }

 */
class DiskLruCache(
  fileSystem: FileSystem,
  /** Returns the directory where this cache stores its data. */
  val directory: Path,
  private val appVersion: Int,
  internal val valueCount: Int,
  /** Returns the maximum number of bytes that this cache should use to store its data. */
  maxSize: Long,
  /** Used for asynchronous journal rebuilds. */
  taskRunner: TaskRunner,
) : Closeable,

        "boolean" to "Boolean",
        "java.lang.Byte" to "Byte",
        "byte" to "Byte",
        "java.lang.Short" to "Short",
        "short" to "Short",
        "java.lang.Integer" to "Int",
        "int" to "Int",
        "java.lang.Long" to "Long",
        "long" to "Long",
        "java.lang.Float" to "Float",
        "float" to "Float",
        "java.lang.Double" to "Double",
        "double" to "Double"

import okhttp3.Protocol
import okhttp3.Response
import okio.IOException

/** An HTTP response status line like "HTTP/1.1 200 OK". */
class StatusLine(
  @JvmField val protocol: Protocol,
  @JvmField val code: Int,
  @JvmField val message: String,
) {
  override fun toString(): String =
    buildString {
      if (protocol == Protocol.HTTP_1_0) {
        append("HTTP/1.0")
      } else {
        append("HTTP/1.1")
      }