Yes, this helps. I am not much familiar Nifi expressions. I found a good 
tutorial in Apache Nifi website. I am going through that now.

Thanks Matt.

From: Matthew Clarke 
<[email protected]<mailto:[email protected]>>
Reply-To: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Date: Tuesday, November 10, 2015 at 3:11 PM
To: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Subject: Re: processor for validation


Naveen,
     The NiFi expression language can be used to accomplish what you are 
looking to do. First extract the "customer_id" from the main message. Then used 
the routeonAttribute processor to only route files where the customer contains 
only numbers.

${'customer_id':matches('[0-9].*')}

    Without looking at your json messages, I can't be specific on the 
expression language statement to use to extract the customer_id.

Does this help?

Matt

On Nov 10, 2015 3:46 PM, "Madhire, Naveen" 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

My requirement is to do validations of few json elements. For example, One of 
the key in Json is customerid and I need to make sure “customer_id” is always 
numeric.

I looked at EvaluateJsonPath, but it is more of checking against an expression.
So is there any processor which can be used for validations?


Thanks,
Naveen



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