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https://issues.apache.org/jira/browse/NIFI-3351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15823307#comment-15823307
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Joseph Percivall commented on NIFI-3351:
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Hello Nicholas,

I believe you can do all of these features using the RouteAttribute 
Processor[1]. The processor allows you to "Route to Property name". By creating 
properties you create any number of relationships. If you route each of these 
relationships to a Funnel (or disabled processor) the FlowFiles will stay in 
that queue. Once they are in the queue you can view the items by right clicking 
on the queue and then from the list click "List Queue". This allows you to see 
all the FlowFiles in the queue. Lastly, just like any other queue, there is 
built-in expiration by right clicking on the queue and configuring it.

Does this sound like it would suit your needs?

[1] 
https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi.processors.standard.RouteOnAttribute/index.html
[2] https://nifi.apache.org/docs/nifi-docs/html/user-guide.html#settings

> Manual Review Processor/Queue
> -----------------------------
>
>                 Key: NIFI-3351
>                 URL: https://issues.apache.org/jira/browse/NIFI-3351
>             Project: Apache NiFi
>          Issue Type: New Feature
>          Components: Core Framework
>            Reporter: Nicholas Carenza
>            Priority: Minor
>              Labels: processor, queue
>         Attachments: nifi-manual-queue.png
>
>
> I'd like to direct certain flowfiles to a manual review queue in certain 
> failure cases where I can view each flowfile just like I can when listing a 
> queue and then choose one of the relationships to send it to.
> Features:
> - Create any number of outgoing relationships
> - Review items selectively from the queue
> - Built-in Expiration relationship for automatically processing flowfiles 
> after a given time or buffer size or flowfile count.



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