.setSize(fessConfig.getPageScoreBoosterMaxFetchSizeAsInteger())
                .execute()
                .actionGet(requestTimeout);
        return Arrays.stream(response.getHits().getHits()).map(SearchHit::getId).toArray(n -> new String[n]);
    };

    /**
     * A function to handle requests.
     */
    protected Function<Map<String, Object>, Long> requestHandler = params -> {

                .addSort("timestamp", SortOrder.ASC)
                .execute()
                .actionGet(fessConfig.getIndexSearchTimeout());

        final SearchHit[] hits = searchResponse.getHits().getHits();
        if (hits.length == 0) {
            return "No log notifications.";
        }

        final List<LogNotificationEvent> events = new ArrayList<>();
        final List<String> docIds = new ArrayList<>();

        final SearchResultBuilder builder = SearchResult.create();
        searchResponseOpt.ifPresent(searchResponse -> {
            final SearchHits searchHits = searchResponse.getHits();
            builder.allRecordCount(searchHits.getTotalHits().value());
            builder.allRecordCountRelation(searchHits.getTotalHits().relation().toString());
            builder.queryTime(searchResponse.getTook().millis());

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = getSearchHits(response);
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                if (!handler.apply(searchHits)) {
                    break;
                }

        int count = 0;
        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = response.getHits();
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                final BulkRequestBuilder bulkRequest = client.prepareBulk();

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = getSearchHits(response);
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                if (!handler.apply(searchHits)) {
                    break;
                }

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = getSearchHits(response);
                final SearchHit[] hits = searchHits.getHits();
                if (hits.length == 0) {
                    break;
                }

                if (!handler.apply(searchHits)) {
                    break;
                }

                .setSize(0)
                .setTrackTotalHits(true)
                .execute()
                .actionGet(fessConfig.getIndexSearchTimeout());
        final TotalHits totalHits = countResponse.getHits().getTotalHits();
        if (totalHits != null) {
            return totalHits.value();
        }
        return 0;
    }

    /**
     * Deletes all documents associated with the specified session ID.

        List<Map<String, Object>> page1 = JsonPath.from(response).getList("response.logs");

        logger.info("Page 1: {}", page1);

        // Get second page
        searchBody.put("page", 2);
        response = checkMethodBase(searchBody).get(API_PATH + "/logs").asString();
        List<Map<String, Object>> page2 = JsonPath.from(response).getList("response.logs");

        logger.info("Page 2: {}", page2);

        List<Map<String, Object>> docs1 = JsonPath.from(wcResponse1).getList("data");
        for (Map<String, Object> doc : docs1) {
            assertTrue(doc.get(field).toString().toLowerCase().contains(query), doc.toString());
        }
        List<Map<String, Object>> docs2 = JsonPath.from(wcResponse2).getList("data");
        for (Map<String, Object> doc : docs2) {