mimeType = "application/octet-stream";
        } else {
            logger.debug("Unknown response: {}", response);
            return;
        }
        adjustActionResponseHeaders(mimeType, (k, v) -> {
            if (logger.isDebugEnabled()) {
                logger.debug("Apply header {}:{} to response of {}", k, v, mimeType);
            }
            response.header(k, v);

 * and converting XContent objects to different output formats.
 */
public final class SearchEngineUtil {

    private static final Logger logger = LogManager.getLogger(SearchEngineUtil.class);

    /**
     * Private constructor to prevent instantiation of this utility class.
     */
    private SearchEngineUtil() {
    }

    /**

 * alternative or supplementary search terms to improve search results.
 */
public class RelatedQueryHelper extends AbstractConfigHelper {
    private static final Logger logger = LogManager.getLogger(RelatedQueryHelper.class);

    /**
     * Map storing related queries organized by virtual host key and search term.

 * It maintains a list of DuplicateHost rules and applies them to URLs.
 *
 */
public class DuplicateHostHelper {
    private static final Logger logger = LogManager.getLogger(DuplicateHostHelper.class);

    /** List of duplicate host rules for URL conversion */
    protected List<DuplicateHost> duplicateHostList;

    /**

                    }
                } else {
                    logger.warn("{} is not available.", generatorName);
                }
            } else if (logger.isDebugEnabled()) {
                logger.debug("No image file exists: {}", noImageFile.getAbsolutePath());
            }
        } catch (final Exception e) {
            logger.warn("Failed to create thumbnail for {}", entity, e);
        }
    }

/**
 * API action for admin related query management.
 * Provides REST endpoints for managing related search queries.
 */
public class ApiAdminRelatedqueryAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminRelatedqueryAction.class);

    // ===================================================================================

 * <ul>
 *   <li>Retry up to 5 times</li>
 *   <li>Wait 500ms between retries</li>
 * </ul>
 *
 */
public class FaultTolerantClient implements CrawlerClient {

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

    /** The underlying crawler client */
    protected CrawlerClient client;

    /** Maximum number of retry attempts */

 * This searcher handles query execution, response processing, and document highlighting.
 */
public class DefaultSearcher extends RankFusionSearcher {

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

    /**
     * Creates a new instance of DefaultSearcher.
     * This constructor initializes the default rank fusion searcher for performing

 * Duplicate host settings help prevent indexing the same content from multiple similar URLs.
 *
 */
public class ApiAdminDuplicatehostAction extends FessApiAdminAction {

    private static final Logger logger = LogManager.getLogger(ApiAdminDuplicatehostAction.class);

    // ===================================================================================

import org.dbflute.utflute.core.PlainTestCase;

/**
 * @author shinsuke
 *
 */
public class LhaExtractorTest extends PlainTestCase {
    private static final Logger logger = LogManager.getLogger(LhaExtractorTest.class);

    public LhaExtractor lhaExtractor;

    @Override
    protected void setUp() throws Exception {
        super.setUp();