public Thread newThread(Runnable r) {
            Thread newThread = new Thread(GROUP, r, "resolver-" + THREAD_NUMBER.getAndIncrement());
            newThread.setDaemon(true);
            newThread.setContextClassLoader(null);
            return newThread;
        }
    }

    private class ResolveTask implements Runnable {

        private final ClassLoader classLoader;

      this.exception = exception;
      this.context = context;
    }
  }

  /** Runnable which registers a StringCatcher on an event bus and adds it to a list. */
  private static class Registrator implements Runnable {
    private final EventBus bus;
    private final List<StringCatcher> catchers;

    Registrator(EventBus bus, List<StringCatcher> catchers) {

@JvmField
internal val UTC: TimeZone = TimeZone.getTimeZone("GMT")!!

internal fun threadFactory(
  name: String,
  daemon: Boolean,
): ThreadFactory =
  ThreadFactory { runnable ->
    Thread(runnable, name).apply {
      isDaemon = daemon
    }
  }

internal fun HttpUrl.toHostHeader(includeDefaultPort: Boolean = false): String {
  val host =
    if (":" in host) {
      "[$host]"
    } else {

  private final ListenableFuture<V> delegate;

  ForwardingFluentFuture(ListenableFuture<V> delegate) {
    this.delegate = checkNotNull(delegate);
  }

  @Override
  public void addListener(Runnable listener, Executor executor) {
    delegate.addListener(listener, executor);
  }

  @Override
  public boolean cancel(boolean mayInterruptIfRunning) {
    return delegate.cancel(mayInterruptIfRunning);
  }

    }

    @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
    Interruptenator(final Thread interruptee, final AtomicBoolean shutdown) {
      super(
          new Runnable() {
            @Override
            public void run() {
              while (!shutdown.get()) {
                interruptee.interrupt();
                Thread.yield();
              }
            }

        };
    addCallback(f, callback, directExecutor());
  }

  private class CountingSameThreadExecutor implements Executor {
    int runCount = 0;

    @Override
    public void execute(Runnable command) {
      command.run();
      runCount++;
    }
  }

  private final class MockCallback implements FutureCallback<String> {
    @Nullable private String value = null;

    private static SystemHelper systemHelper;

    private static FessConfig fessConfig;

    private static List<Runnable> initProcesses = new ArrayList<>();

    private ComponentUtil() {
    }

    public static void processAfterContainerInit(final Runnable process) {
        if (available()) {
            process.run();
        } else {
            initProcesses.add(process);
        }

    return task;
  }

  /**
   * Executes {@code runnable} on the specified {@code executor}, returning a {@code Future} that
   * will complete after execution.
   *
   * @throws RejectedExecutionException if the task cannot be scheduled for execution
   * @since 28.2
   */
  public static ListenableFuture<@Nullable Void> submit(Runnable runnable, Executor executor) {
    TrustedListenableFutureTask<@Nullable Void> task =

                    systemProperty 'org.apache.xerces.xni.parser.XMLParserConfiguration', 'org.apache.xerces.parsers.XIncludeParserConfiguration'
                }
            }
        } as Runnable)
    }

  private Thread executionThread;
  private Throwable thrownByExecutionThread;
  private final Executor exceptionCatchingExecutor =
      new Executor() {
        @Override
        public void execute(Runnable command) {
          executionThread = new Thread(command);
          executionThread.setUncaughtExceptionHandler(
              new UncaughtExceptionHandler() {
                @Override