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https://issues.apache.org/jira/browse/MINIFICPP-31?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16358809#comment-16358809
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ASF GitHub Bot commented on MINIFICPP-31:
-----------------------------------------

GitHub user achristianson opened a pull request:

    https://github.com/apache/nifi-minifi-cpp/pull/262

    MINIFICPP-31 Added UpdateAttribute processor

    Thank you for submitting a contribution to Apache NiFi - MiNiFi C++.
    
    In order to streamline the review of the contribution we ask you
    to ensure the following steps have been taken:
    
    ### For all changes:
    - [x] Is there a JIRA ticket associated with this PR? Is it referenced
         in the commit message?
    
    - [x] Does your PR title start with MINIFI-XXXX where XXXX is the JIRA 
number you are trying to resolve? Pay particular attention to the hyphen "-" 
character.
    
    - [x] Has your PR been rebased against the latest commit within the target 
branch (typically master)?
    
    - [x] Is your initial contribution a single, squashed commit?
    
    ### For code changes:
    - [x] If adding new dependencies to the code, are these dependencies 
licensed in a way that is compatible for inclusion under [ASF 
2.0](http://www.apache.org/legal/resolved.html#category-a)?
    - [x] If applicable, have you updated the LICENSE file?
    - [x] If applicable, have you updated the NOTICE file?
    
    ### For documentation related changes:
    - [x] Have you ensured that format looks appropriate for the output in 
which it is rendered?
    
    ### Note:
    Please ensure that once the PR is submitted, you check travis-ci for build 
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You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/achristianson/nifi-minifi-cpp MINIFICPP-31

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/nifi-minifi-cpp/pull/262.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #262
    
----
commit fb4e92d20c578299780fcf764fc9d0636af3259d
Author: Andrew I. Christianson <andy@...>
Date:   2018-02-08T18:51:08Z

    MINIFICPP-31 Added UpdateAttribute processor

----


> Support UpdateAttribute for nifi-minifi-cpp
> -------------------------------------------
>
>                 Key: MINIFICPP-31
>                 URL: https://issues.apache.org/jira/browse/MINIFICPP-31
>             Project: NiFi MiNiFi C++
>          Issue Type: New Feature
>            Reporter: Randy Gelhausen
>            Assignee: Andrew Christianson
>            Priority: Major
>
> nifi-minifi-cpp agents can generate multiple "streams" of flowfiles.
> For instance, to monitor a host, nifi-minifi-cpp runs nmon, ps, netstat, and 
> gathers logfiles from applications.
> But, for a given flowfile, any downstream NiFi collectors wont have 
> visibility into the originating hostname, nor metadata about which "stream" 
> (ExecuteProcess(nmon), ExecuteProcess(ps), TailFile(app1), TailFile(app2)) 
> generated it.
> One solution is to use a separate InputPort for each stream. This works, but 
> burdens both the team working on agent flows, and the team managing the 
> collector- they have to be in concert.
> A simpler (better?) approach is to allow agent teams to tag flowfiles with 
> differentiating metadata via use of UpdateAttribute.



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