}

    private void ensureIndexExists(final SearchEngineClient client, final String indexName) {
        if (!indexChecked) {
            if (!client.existsIndex(indexName)) {
                client.createIndex(NOTIFICATION_QUEUE_INDEX, indexName);
            }
            indexChecked = true;
        }
    }

        }

        final SearchEngineClient client = ComponentUtil.getSearchEngineClient();
        final String indexName = fessConfig.getIndexLogIndex() + ".notification_queue";

        if (!client.existsIndex(indexName)) {
            return "No log notifications.";
        }

        final int searchSize = fessConfig.getLogNotificationSearchSizeAsInteger();