question Re: How to parse the NiFi filename attribute that has embedded directory information ( a/b/c/file.log ) and extract only the file name (file.log) using expression language and possibly UpdateAttribute processor? in Support Questions

Parsing Embedded Paths from the NiFi filename Attribute Using Expression Language

guha — Fri, 05 Jun 2026 02:32:54 GMT

MattWho — Thu, 04 May 2017 23:29:22 GMT

You would certainly use the UpdateAttribute processor to do this and a NiFi expression language statement as follows :

${filename:substringAfterLast('/')}

Thanks,

Matt

bbende — Thu, 04 May 2017 23:30:37 GMT

There is an expression language guide here:

For your example you should be able to create an UpdateAttribute processor and add a new property like:

myfilename = ${filename:substringAfterLast('/')}