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https://issues.apache.org/jira/browse/NIFI-5440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16548097#comment-16548097
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Mike Thomsen commented on NIFI-5440:
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[~pvillard] not necessarily. The EL part could be only part of the collection 
name. For example, suppose this contrived scenario: medical-imaging-${locale}. 
Locale could be a state for the US and then the equivalent of 
${city}-${country} for a lot of other countries.

> GetMongo should put database and collection names in flowfile attributes
> ------------------------------------------------------------------------
>
>                 Key: NIFI-5440
>                 URL: https://issues.apache.org/jira/browse/NIFI-5440
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: Mike Thomsen
>            Assignee: Mike Thomsen
>            Priority: Minor
>
> GetMongo has EL support for database and collection names, so the same 
> GetMongo instance can service every database and collection in a MongoDB 
> cluster. Therefore, GetMongo should provide the source database and 
> collection names as attributes on the flowfiles so downstream processors have 
> access to that information for making decisions. This is particularly 
> important for RouteOnAttribute.



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