source.put("throwable", event.getThrowable() != null ? event.getThrowable() : "");
                    source.put("timestamp", event.getTimestamp());
                    bulkRequest.add(client.prepareIndex().setIndex(indexName).setSource(source));
                }
                final BulkResponse response = bulkRequest.execute().actionGet(30_000L);
                if (response.hasFailures()) {

    }

    /**
     * Prepares an index request builder.
     *
     * @return the index request builder
     */
    @Override
    public IndexRequestBuilder prepareIndex() {
        return client.prepareIndex();
    }

    /**
     * Updates a document asynchronously.
     *
     * @param request the update request
     * @return a future for the update response
     */