* It includes functionality for updating configurations in a separate thread and controlling the reloading interval.
 */
public abstract class AbstractConfigHelper {

    /**
     * Default constructor.
     */
    public AbstractConfigHelper() {
        // Default constructor
    }

    /**
     * The interval for reloading.
     */
    protected long reloadInterval = 1000L;

    /**

 * based on search terms and virtual hosts. Related queries are used to suggest
 * 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.

import org.lastaflute.web.util.LaRequestUtil;

import jakarta.annotation.PostConstruct;

/**
 * Helper class for path mapping configuration.
 */
public class PathMappingHelper extends AbstractConfigHelper {

    /**
     * Default constructor.
     */
    public PathMappingHelper() {
        super();
    }

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

        assertEquals(0, configHelper.load());

        configHelper.setLoadCallback(() -> -1);
        assertEquals(-1, configHelper.load());
    }

    static class TestConfigHelper extends AbstractConfigHelper {

        private final AtomicInteger loadCallCount = new AtomicInteger(0);
        private LoadCallback loadCallback = () -> 0;

        @Override
        public int load() {

 * based on search queries and virtual host configurations. It supports both exact
 * term matching and regex pattern matching for flexible content association.
 */
public class RelatedContentHelper extends AbstractConfigHelper {

    /**
     * Default constructor for RelatedContentHelper.
     * The constructor does not perform any initialization logic as the actual