public Integer getSuggestPopularWordCacheSizeAsInteger() {
                        return 1000;
                    }

                    @Override
                    public Integer getSuggestPopularWordCacheExpireAsInteger() {
                        return 10;
                    }

                    @Override
                    public String getSuggestPopularWordSeed() {
                        return "default_seed";

        cache = CacheBuilder.newBuilder()
                .maximumSize(fessConfig.getSuggestPopularWordCacheSizeAsInteger().longValue())
                .expireAfterWrite(fessConfig.getSuggestPopularWordCacheExpireAsInteger().longValue(), TimeUnit.MINUTES)
                .build();
    }

    /**
     * Retrieves a list of popular words based on the specified search parameters.