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From "Caleb Johnson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MINIFICPP-39) Create FocusArchive processor
Date Fri, 29 Sep 2017 18:34:02 GMT

    [ https://issues.apache.org/jira/browse/MINIFICPP-39?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16186205#comment-16186205
] 

Caleb Johnson commented on MINIFICPP-39:
----------------------------------------

[~achristianson],

I've rebased this and started working on tests in a branch on NifiLocal. If you have any WIPs
for tests, could you send them to me?

> Create FocusArchive processor
> -----------------------------
>
>                 Key: MINIFICPP-39
>                 URL: https://issues.apache.org/jira/browse/MINIFICPP-39
>             Project: NiFi MiNiFi C++
>          Issue Type: Task
>            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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