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https://issues.apache.org/jira/browse/NIFI-4262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506142#comment-16506142
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ASF GitHub Bot commented on NIFI-4262:
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Github user asfgit closed the pull request at:
https://github.com/apache/nifi/pull/2056
> MergeContent - option to add merged uuid in original flow files
> ---------------------------------------------------------------
>
> Key: NIFI-4262
> URL: https://issues.apache.org/jira/browse/NIFI-4262
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Reporter: Pierre Villard
> Assignee: Pierre Villard
> Priority: Major
>
> With the apparition of Wait/Notify processors it is now possible tackle new
> challenges when it comes to synchronize the execution of different parts of
> the workflow.
> The objective here is the following:
> Flow files are sent to a MergeContent processor. Merged flow files are then
> sent to a processor A while original flow files are sent to a processor B. I
> want to trigger processor B when and only when processor A has completed.
> To use the Wait/Notify approach, a common attribute must be available to be
> used as a signal in the distributed cache. This JIRA is about adding a
> processor property allowing a user to add the UUID of the merged flow file as
> a new attribute of all the original flow files that are constituting the
> merged flow file.
> The template attached to NIFI-4028 can be used for this use case. Note that
> the fix for NIFI-4028 is needed to solve the use case described in this JIRA.
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