title: Get source/upstream connection's processor name in nifi
body: <p>I want to monitor the flowfiles in Nifi from business perspective.</p>
  
  <p>So I have added executescript processor using python script which creates the message and pushes the same in elasticsearch after each processor.</p>
  
  <p>I want the parent processor name or id of this executescript processor so that I will keep appending in the flowfile which will allow to know through which stages/processors this flow file is passed through and I can monitor it in ELK.</p>