* @return {@link Logger}
     */
    public static synchronized Logger getLogger(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);

        if (!initialized) {
            initialize();
        }
        Logger logger = loggers.get(clazz);
        if (logger == null) {
            logger = new Logger(clazz);
            loggers.put(clazz, logger);
        }

      } catch (Throwable t) {
        logger.log(Level.SEVERE, "Error cleaning up after reference.", t);
      }
    }
  }

  /**
   * Iterates through the given loaders until it finds one that can load Finalizer.
   *
   * @return Finalizer.class
   */
  private static Class<?> loadFinalizer(FinalizerLoader... loaders) {
    for (FinalizerLoader loader : loaders) {

                        if (logger.isDebugEnabled()) {
                            logger.debug("{} exists.", urlQueue.getUrl(), e);
                        }
                        return;
                    }
                    throw e;
                }
                if (logger.isDebugEnabled()) {
                    logger.debug("Storing child urls: {}", resultData.getChildUrlSet());

                responseParams.add(new Pair<>(tokenName, tokenValue));
                if (logger.isDebugEnabled()) {
                    logger.debug("Token: {}", tokenValue);
                }
            } else if (logger.isDebugEnabled()) {
                logger.debug("Token is not found.\n{}", content);
            }
        } catch (final IOException e) {

      currentThread = Thread.currentThread()
      logger.addHandler(loggerHandler)
    }

    override fun secureConnectEnd(
      call: Call,
      handshake: Handshake?,
    ) {
      logger.removeHandler(loggerHandler)
    }

    override fun callEnd(call: Call) {
      // Cleanup log handler if failed.
      logger.removeHandler(loggerHandler)
    }

    /**
     * Target indices for OpenSearch.
     */
    public static final String TARGET_INDICES = "crawler.opensearch.target_indices";

    /**
     * Logger instance.
     */
    private static final Logger logger = LogManager.getLogger(FesenClient.class);

    /**
     * The OpenSearch client.
     */
    protected Client client;

    /**

    //                                                                          Definition
    //                                                                          ==========
    /** Logger instance for this class. */
    private static final Logger logger = LogManager.getLogger(FessBaseAction.class);

    /** The application type for FESs, e.g. used by access context. */
    protected static final String APP_TYPE = "FES"; // #change_it_first

   * This ISE wouldn't actually bubble up but would get logged by ExecutionQueue. This obfuscated
   * the original error (which was not constructing ServiceManager correctly).
   */
  public void testPartiallyConstructedManager() {
    Logger logger = Logger.getLogger("global");
    logger.setLevel(Level.FINEST);
    TestLogHandler logHandler = new TestLogHandler();
    logger.addHandler(logHandler);

  fun connectionPreface() {
    withLock {
      if (closed) throw IOException("closed")
      if (!client) return // Nothing to write; servers don't send connection headers!
      if (logger.isLoggable(FINE)) {
        logger.fine(format(">> CONNECTION ${CONNECTION_PREFACE.hex()}"))
      }
      sink.write(CONNECTION_PREFACE)
      sink.flush()
    }
  }

  /** Applies `peerSettings` and then sends a settings ACK. */

 *   <li>Old document deletion after successful crawling</li>
 *   <li>Crawling execution monitoring and timing</li>
 * </ul>
 */
public class DataIndexHelper {

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(DataIndexHelper.class);

    /** Parameter key for controlling deletion of old documents */
    private static final String DELETE_OLD_DOCS = "delete_old_docs";