final File aliasConfigDir = ResourceUtil.getResourceAsFile(aliasConfigDirPath);
            if (aliasConfigDir.isDirectory()) {
                final IndicesAliasesRequestBuilder builder = client.admin().indices().prepareAliases();
                stream(aliasConfigDir.listFiles((dir, name) -> name.endsWith(".json"))).of(stream -> stream.forEach(f -> {
                    String aliasName = f.getName().replaceFirst(".json$", "");