*
 * All event methods must execute fast, without external locking, cannot throw exceptions, attempt
 * to mutate the event parameters, or be re-entrant back into the client. Any IO - writing to files
 * or network should be done asynchronously.
 */
abstract class EventListener {
  /**
   * Invoked as soon as a call is enqueued or executed by a client. In case of thread or stream

import jakarta.annotation.Resource;

/**
 * The {@code CrawlerThread} class represents a thread that executes the crawling process.
 * It is responsible for fetching URLs from the queue, accessing the content,
 * processing the response, and extracting child URLs.
 *
 * <p>
 * This class implements the {@link Runnable} interface, allowing it to be executed in a separate thread.

            return StringUtils.abbreviate(originalStr, maxWidth);
        } catch (final IOException e) {
            return StringUtil.EMPTY; // empty
        }
    }

    /**
     * Processes a crawling request for a specific URL.
     * Executes the full crawling pipeline including client execution, rule processing,

        return null; // ignore
    }

    /**
     * Executes a search based on the provided search criteria.
     *
     * @param form the list form containing search criteria
     * @return HTML response with search results
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse search(final ListForm form) {
        saveToken();

                    logger.debug("Scheduled job is not running: id={}", scheduledJob.getId());
                }
            }
        });
        return counter.get();
    }

    /**
     * Executes the crawler process in a separate JVM.
     * This method constructs the command line arguments, sets up the classpath,
     * and launches the crawler as an external process. It handles process lifecycle,

     */
    @Override
    public ResponseData doGet(final String uri) {
        return processRequest(uri, true);
    }

    /**
     * Executes a HEAD request for the given URL.
     * @param url The URL to request.
     * @return The ResponseData.
     */
    @Override
    public ResponseData doHead(final String url) {
        try {

      new IteratorOperation() {
        @Override
        public @Nullable Object execute(Iterator<?> iterator) {
          iterator.remove();
          return null;
        }
      };

  private static final IteratorOperation NEXT_METHOD =
      new IteratorOperation() {
        @Override
        public @Nullable Object execute(Iterator<?> iterator) {
          return iterator.next();
        }
      };

    }

    /**
     * Executes the HTTP client request.
     *
     * @param httpRequest The HTTP request to execute
     * @return The HTTP response
     * @throws IOException If an I/O error occurs
     */
    protected HttpResponse executeHttpClient(final HttpUriRequest httpRequest) throws IOException {
        return httpClient.execute(httpRequest, new BasicHttpContext(httpClientContext));
    }

    assertThat(graphAsMutableGraph.removeNode(N1)).isTrue();

    // The choice of the size() method to call here is arbitrary.  We assume that if any of the Set
    // methods executes the validation check, they all will, and thus we only need to test one of
    // them to ensure that the validation check happens and has the expected behavior.
    assertNodeRemovedFromGraphErrorMessage(

      new IteratorOperation() {
        @Override
        public @Nullable Object execute(Iterator<?> iterator) {
          iterator.remove();
          return null;
        }
      };

  private static final IteratorOperation NEXT_METHOD =
      new IteratorOperation() {
        @Override
        public @Nullable Object execute(Iterator<?> iterator) {
          return iterator.next();
        }
      };