How to ignore/filter flow-files on the base of attributes in Nifi

[#1]

Hi,

I have a scenario where I want to ignore flow files if an attribute of a flowfile contains invalid value (like filename contains invalid value i.e name of a directory rather then a filename)

Is there a way to totally discard/ignore a FlowFile on the base of an attribute value?

Thanks

Obaid

[#2 · Accepted solution]

The RouteOnAttribute processor is what you're looking for, you can match on an attribute value (for example), and only route to a "matched" relationship; self-terminating the "unmatched" relationship would cause the FlowFile to be discarded/ignored. Also if you want to do any error handling you could route unmatched flow files to another processor to log or otherwise handle them.

[#3]

I'd add as a comment to Matt's answer that you can check the content of your attributes using the expression language [1]. It provides a lot of functions to deal with attributes and apply conditions to route your flow files if and only if they respect the conditions you want.

[1] https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html

[#4]

Thanks a lot @Matt Burgess and @Pierre Villard for a quick response,

[#5]

Hello,

Is it possible to compare the attributes of two different flowfiles and only pass one if the comparisson results matched?

Thank you,

Jon

[#6]

@Jon Rodriguez Breton

This should be a new question in HCC, not appended to your first question.

[#7]

Hi,

New question added here:

https://community.hortonworks.com/questions/135939/compare-attributes-of-different-flowfiles.html

Hope you can help me.

Jon