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https://issues.apache.org/jira/browse/NIFI-5674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16644302#comment-16644302
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Bryan Bende commented on NIFI-5674:
-----------------------------------
[~tcots] have you tried using NiFi Registry to put process groups under version
control?
I think versioned process groups will give you the behavior you are describing.
Basically you can create a process group and place it under version control
which saves a version of it to registry. You can then create new process groups
by importing from registry which are then tracked against the versioned flow in
registry. Whenever you save a new version of it to registry, you can upgrade
all of the instances of it in place.
> Add referenceable templates
> ---------------------------
>
> Key: NIFI-5674
> URL: https://issues.apache.org/jira/browse/NIFI-5674
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 1.5.0, 1.6.0, 1.7.0
> Reporter: Scott Wilburn
> Priority: Major
> Labels: class, templates
>
> Everyone knows how important code re-use is. NiFi's templates work great for
> this if you only have a handful of flows to use them in. Templates act more
> like copy-paste code re-use, because each time you apply a template, you are
> making a separate copy of the XML code and applying it to your canvas. What's
> missing is the ability to maintain one copy of the code, so that you can make
> changes to logic embedded in a template and have those changes applied to all
> instances of that code. It should work more like a library of classes in an
> OO language, or at least have that as an option. I propose having a type of
> template that can be applied in a read-only state, linked somehow to the
> saved template. If the source template is updated, changes to all instances
> of the template should be applied. I would imagine it would act similar to
> how variables are changed, where it has to stop all processors, apply the
> changes, then restart them. I think the same general idea could be applied to
> templates.
> Referenceable templates would make creating and maintaining large NiFi
> deployments much easier and less error prone. I know it's been talked about
> in the groups before, but I think it's time to put some action behind it now.
>
> Thanks,
> Scott
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