* Provides functionality to retrieve popular words based on search parameters
 * and manages caching for improved performance.
 */
public class PopularWordHelper {
    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(PopularWordHelper.class);

    /** Character used to separate cache key components */
    protected static final char CACHE_KEY_SPLITTER = '\n';

    /** The list of content field names. */
    protected List<String> contentFieldList;

    /** The popular word helper for handling popular words. */
    protected PopularWordHelper popularWordHelper = null;

    /** The interval for storing search logs. */
    protected long searchStoreInterval = 1; // min

    /**
     * Initializes the SuggestHelper.

        }
        final String[] fields = request.getParameterValues("field");

        final PopularWordHelper popularWordHelper = ComponentUtil.getPopularWordHelper();

        final StringBuilder buf = new StringBuilder(255);
        try {
            final List<String> popularWordList =
                    popularWordHelper.getWordList(SearchRequestType.JSON, seed, tags, null, fields, StringUtil.EMPTY_STRINGS);