What is the syntax issue connecting EvaluateJsonPath to RouteOnAttribute ?
On Mon, Oct 15, 2018 at 1:21 PM N, Vyshali wrote:
>
> Hi,
>
>
>
> I’m not appending the “status” attribute to the input json content. I’m just
> using as a parameter for comparison
>
> I tried the same way connecting EvaluateJsonPath with RouteOnAttribute. I was
> facing some syntax issue.
>
> So I took the alternative of using updateAttribute and doing the comparison
>
>
>
> My EL is ${status:contains(${result.status})}.
>
>
>
> Please let me know where I’m missing
>
>
>
> Regards
>
> Vyshali
>
>
>
> From: Sivaprasanna [mailto:sivaprasanna...@gmail.com]
> Sent: Monday, October 15, 2018 6:47 PM
> To: users@nifi.apache.org
> Subject: [External] Re: Issue with RouteOnAttribute
>
>
>
> Adding on, 'RouteOnAttribute' takes ExpressionLanguage. "$.result.status" is
> not an ExpressionLanguage (EL) but a JSON Path expression. So what you can do
> is, use EvaluateJsonPath processor to read the value of status using
> "$.result.status" and assign it to an attribute, say "statusField" (this gets
> added as a FlowFile attribute). Connect EvaluateJsonPath with
> RouteOnAttribute and reference the attribute you have added in
> EvaluateJsonPath using EL. Ex: ${statusField:equals("OK")}
>
>
>
> On Mon, Oct 15, 2018 at 6:31 PM Sivaprasanna
> wrote:
>
> Vyshali,
>
>
>
> UpdateAttribute adds an attribute to the FlowFile i.e. just like filename,
> filesize, etc., when you set "status" : "OK" using UpdateAttribute, the field
> doesn't actually get added to the JSON content. I would rather suggest you to
> use 'UpdateRecord' processor and configure it with JSON Reader and JSON
> Writer (providing them with a schema for your JSON content) and set the new
> field "status": "OK". For more details on UpdateRecord, check this tutorial.
> https://community.hortonworks.com/articles/189642/update-the-contents-of-flowfile-by-using-updaterec.html
>
>
>
> -
>
> Sivaprasanna
>
>
>
> On Mon, Oct 15, 2018 at 6:09 PM N, Vyshali wrote:
>
> Hi,
>
>
>
> I’m consuming the message published through “PutJMS” processor using
> “ConsumeJMS” processor. The message is in JSON format. I added the value of
> “status” as “OK” using “UpdateAttribute” processor. I wanted to route it to
> “AttributesToJSON” processor if the value of $.result.status is “OK” for
> which I’m using the “RouteOnAttribute” processor .The regular expression
> which I used for routing is ${status:contains(${result.status})}. But the
> routing doesn’t happen correctly.
>
>
>
> Sample input json :
>
> {
>
> "revision": "1.0.0",
>
> "acceptor": "100",
>
> "result": {
>
> "status": "OK"
>
> }
>
> }
>
>
>
> Please let me know where I’m missing.
>
> Thanks in advance
>
>
>
> Regards
>
> Vyshali
