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https://issues.apache.org/jira/browse/MINIFI-244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15938522#comment-15938522
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John Reynolds commented on MINIFI-244:
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[~achristianson],
I think this is a great idea. You could naturally extend this idea to other
data formats other than just archives such as XML files, json, etc. by creating
additional Focus/Unfocus/Lens processors tailored to those formats.
> Create FocusArchive processor
> -----------------------------
>
> Key: MINIFI-244
> URL: https://issues.apache.org/jira/browse/MINIFI-244
> Project: Apache NiFi MiNiFi
> Issue Type: Task
> Components: C++, Extensions
> Reporter: Andrew Christianson
> Assignee: Andrew Christianson
> Priority: Minor
>
> Create an FocusArchive processor which implements a lens over an archive
> (tar, etc.). A concise, though informal, definition of a lens is as follows:
> "Essentially, they represent the act of “peering into” or “focusing in on”
> some particular piece/path of a complex data object such that you can more
> precisely target particular operations without losing the context or
> structure of the overall data you’re working with."
> https://medium.com/@dtipson/functional-lenses-d1aba9e52254#.hdgsvbraq
> Why an FocusArchive in MiNiFi? Simply put, it will enable us to "focus in on"
> an entry in the archive, perform processing *in-context* of that entry, then
> re-focus on the overall archive. This allows for transformation or other
> processing of an entry in the archive without losing the overall context of
> the archive.
> Initial format support is tar, due to its simplicity and ubiquity.
> Attributes:
> - Path (the path in the archive to focus; "/" to re-focus the overall archive)
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