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https://issues.apache.org/jira/browse/NIFI-5859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16704855#comment-16704855
 ] 

ASF GitHub Bot commented on NIFI-5859:
--------------------------------------

GitHub user markap14 opened a pull request:

    https://github.com/apache/nifi/pull/3192

    NIFI-5859: Added XML-based documentation writer that can be used to d…

    …ocument a component.
    
    - Found several instances of nifi-framework-api's ProviderException being 
thrown from processors. Changed those to IllegalStateException, as 
ProviderException is not an appropriate Exception in those cases, and 
extensions should not depend on nifi-framework-api.
    - Performed some cleanup, moving Property Descriptors from Controller 
Service API's/specs into the implementations. Adding to the Service API results 
in bringing in nifi-utils to the nifi-standard-services-api-nar, which is a bad 
practice. The 'main' service api nar should not have a dependency on a util 
class.
    
    Thank you for submitting a contribution to Apache NiFi.
    
    In order to streamline the review of the contribution we ask you
    to ensure the following steps have been taken:
    
    ### For all changes:
    - [ ] Is there a JIRA ticket associated with this PR? Is it referenced 
         in the commit message?
    
    - [ ] Does your PR title start with NIFI-XXXX where XXXX is the JIRA number 
you are trying to resolve? Pay particular attention to the hyphen "-" character.
    
    - [ ] Has your PR been rebased against the latest commit within the target 
branch (typically master)?
    
    - [ ] Is your initial contribution a single, squashed commit?
    
    ### For code changes:
    - [ ] Have you ensured that the full suite of tests is executed via mvn 
-Pcontrib-check clean install at the root nifi folder?
    - [ ] Have you written or updated unit tests to verify your changes?
    - [ ] 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)? 
    - [ ] If applicable, have you updated the LICENSE file, including the main 
LICENSE file under nifi-assembly?
    - [ ] If applicable, have you updated the NOTICE file, including the main 
NOTICE file found under nifi-assembly?
    - [ ] If adding new Properties, have you added .displayName in addition to 
.name (programmatic access) for each of the new properties?
    
    ### For documentation related changes:
    - [ ] 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 
issues and submit an update to your PR as soon as possible.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/markap14/nifi NIFI-5859

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

    https://github.com/apache/nifi/pull/3192.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 #3192
    
----
commit e07d9be3b07ade875c87d6463487807ca2bf5246
Author: Mark Payne <markap14@...>
Date:   2018-11-15T17:07:08Z

    NIFI-5859: Added XML-based documentation writer that can be used to 
document a component.
    - Found several instances of nifi-framework-api's ProviderException being 
thrown from processors. Changed those to IllegalStateException, as 
ProviderException is not an appropriate Exception in those cases, and 
extensions should not depend on nifi-framework-api.
    - Performed some cleanup, moving Property Descriptors from Controller 
Service API's/specs into the implementations. Adding to the Service API results 
in bringing in nifi-utils to the nifi-standard-services-api-nar, which is a bad 
practice. The 'main' service api nar should not have a dependency on a util 
class.

----


> Update NAR maven plugin to include information about Extensions
> ---------------------------------------------------------------
>
>                 Key: NIFI-5859
>                 URL: https://issues.apache.org/jira/browse/NIFI-5859
>             Project: Apache NiFi
>          Issue Type: New Feature
>          Components: Tools and Build
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Major
>
> In order to have the NiFi Registry host any extensions, the registry will 
> need a way to know what extensions exist in a given NAR. Currently, that 
> information is not available directly.
> The NAR maven plugin should be updated to provide a list of extensions and 
> for each one, provide at least the following minimal information:
>  * Extension Type
>  * Extension Name
>  * Capability Description
>  * Whether or not the component is Restricted, "sub-restrictions" it has, and 
> explanations of both
>  * Any Tags that the component has
>  * If the component is a Controller Service, any Controller Service API's 
> that it provides
> Additionally, it would be ideal to provide all documentation for the 
> component within the NAR. It is best, though, not to write the documentation 
> in HTML as is done now but rather in XML or some sort of form that provides 
> the information in a structured way without any styling. This would allow the 
> documentation to be rendered consistently, even if the styling changes from 1 
> version to the next.



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