Thanks for the advice Matt. Let me preface this by saying I'm completely new to Nifi. After looking at the source code for ListFile processor, I've got some questions about implementing WatchFile: Would it be ideal if I were to do something similar to ListFile? I.E. I would extend AbstractListProcessor<FileInfo> instead of AbstractProcessor itself. I would implement my own version of performListing with the WatchServiceAPI along with the other functions from AbstractListProcessor that I would need to override, and let the AbstractListProcessor generate the Flow Files? Thanks for your help. ... View more