public DurableElasticsearchSink(ElasticsearchSinkOptions options) { _state = ElasticsearchSinkState.Create(options); if (string.IsNullOrWhiteSpace(options.BufferBaseFilename)) { throw new ArgumentException("Cannot create the durable ElasticSearch sink without a buffer base file name!"); } _sink = new RollingFileSink( options.BufferBaseFilename + FileNameSuffix, _state.DurableFormatter, options.BufferFileSizeLimitBytes, null); _shipper = new ElasticsearchLogShipper(_state); }