protected LoadingCache<String, StatsObject> statsCache;

    @PostConstruct
    public void init() {
        statsLogger = LogManager.getLogger(loggerName);
        statsCache = CacheBuilder.newBuilder().maximumSize(maxCacheSize).expireAfterWrite(cacheExpireAfterWrite, TimeUnit.MILLISECONDS)
                .build(new CacheLoader<String, StatsObject>() {
                    @Override

            SuggestResponse response = suggestIndex.suggest(query[0]);

            XContentBuilder builder  = JsonXContent.contentBuilder()
                .startObject()
                .startObject("response")
                .startArray("result")
                .startObject()
                .startArray("result");

            for(String word: response.getWords()) {
                builder.value(word);
            }

            }
            if (empty) {
                client.admin().indices().preparePutMapping(actualIndex)
                        .setSource(XContentFactory.jsonBuilder().startObject().startObject("properties").startObject(FieldNames.ARRAY_KEY)
                                .field("type", "keyword").endObject().endObject().endObject())
                        .execute().actionGet(settings.getIndicesTimeout());
            }

    public static final String CREATE_TIME = "createTime";

    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();
        if (sessionId != null) {
            builder.field(SESSION_ID, sessionId);
        }
        if (method != null) {
            builder.field(METHOD, method);
        }
        if (url != null) {

            }
        }
    }

    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();
        if (transformerName != null) {
            builder.field(TRANSFORMER_NAME, transformerName);
        }
        if (data != null) {
            builder.field(DATA, data);
        }

    public void setUrl(final String url) {
        this.url = url;
    }

    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();
        if (sessionId != null) {
            builder.field(SESSION_ID, sessionId);
        }
        if (filterType != null) {
            builder.field(FILTER_TYPE, filterType);
        }

        initializedData = true;
    }

    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();
        if (sessionId != null) {
            builder.field(SESSION_ID, sessionId);
        }
        if (ruleId != null) {
            builder.field(RULE_ID, ruleId);
        }
        if (url != null) {

        final Set<String> fieldSet = ComponentUtil.getFessConfig().getApiPingEsFieldSet();
        try (OutputStream out = SearchEngineUtil.getXContentBuilderOutputStream((builder, params) -> {
            builder.startObject();
            if (fieldSet.contains(CLUSTER_NAME)) {
                builder.field(CLUSTER_NAME, response.getClusterName());
            }
            if (fieldSet.contains(STATUS)) {

        out.writeOptionalString(storeName);
    }

    @Override
    protected void doXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject(NAME);
        if (modelName != null) {
            builder.field(MODEL_NAME.getPreferredName(), modelName);
        }
        if (featureSetName != null) {

            final NodesStatsResponse response = esClient.admin().cluster().prepareNodesStats().all().execute().actionGet(10000L);
            final XContentBuilder builder = XContentFactory.jsonBuilder();
            builder.startObject();
            response.toXContent(builder, ToXContent.EMPTY_PARAMS);
            builder.endObject();
            builder.flush();
            try (OutputStream out = builder.getOutputStream()) {