Anup,
I think I'm understanding now. Looks like you're getting bitten by a bug:
https://issues.apache.org/jira/browse/NIFI-625
It should be addressed in the next version of NiFi.
So I realize this is a pain, but a work around that you can use in the mean
time is to chain together two ReplaceText processors:
The first one, like you outlined below, would replace ".+" with:
filename: ${filename}
This should perform the replacement correctly because there's no enclosing { }.
Then second would then be configured with the Regular Expression set to "(.+)"
and the Replacement Value set to:
{
$1
}
This will replace the "$1" with whatever value matches Capturing Group 1 of the
regular expression - in this case the entire content of the FlowFile.
Please let me know if this helps!
Thanks
-Mark
----------------------------------------
> Date: Tue, 26 May 2015 21:31:11 -0700
> From: [email protected]
> To: [email protected]
> Subject: RE: send JSON format to kafka and avoid duplication
>
> Mark,
> That doesn't help. I'm getting the same results with the extra "$" too..
>
> Observation: If I have the curly braces around it doesn't replace the actual
> value (for the below ones)
> - {filename:${filename}}
> - {filename:$${filename}}
>
> But, if I omit the curly braces, the evaluation goes fine
> filename:${filename}
>
> Is there something like a 'eval' function or a backtick ` that I could use
> to evaluate and obtain the real filename inside a JSON like the below??
>
> {filename:eval(${filename}}
>
>
>
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