private ByteStreamReader createByteStreamReaders(Segment segment) { String delegationToken = Futures.getAndHandleExceptions(controller.getOrRefreshDelegationTokenFor(segment.getScope(), segment.getStream() .getStreamName()), RuntimeException::new); return new ByteStreamReaderImpl(inputStreamFactory.createInputStreamForSegment(segment, delegationToken), metaStreamFactory.createSegmentMetadataClient(segment, delegationToken)); }