* @param settings The SuggestSettings instance.
     * @param indexName The name of the index to read from.
     */
    public ESSourceReader(final Client client, final SuggestSettings settings, final String indexName) {
        this.client = client;
        this.settings = settings;
        this.indexName = indexName;
        supportedFields = settings.array().get(SuggestSettings.DefaultKeys.SUPPORTED_FIELDS);

                final String indexName = createIndexName(index);
                if (logger.isInfoEnabled()) {
                    logger.info("Create suggest index: {}", indexName);
                }

                client.admin()
                        .indices()
                        .prepareCreate(indexName)
                        .setSettings(settingsSource, XContentType.JSON)

    }

    @Test
    public void test_indexFromDocumentReader() throws Exception {
        Client client = runner.client();
        int num = 10000;
        String indexName = "test";

        BulkRequestBuilder bulkRequestBuilder = client.prepareBulk();
        for (int i = 0; i < num; i++) {
            Map<String, Object> source = Collections.singletonMap("content", "test");