[ 
https://issues.apache.org/jira/browse/METRON-777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16118731#comment-16118731
 ] 

ASF GitHub Bot commented on METRON-777:
---------------------------------------

Github user mmiklavc commented on the issue:

    https://github.com/apache/metron/pull/530
  
    This looks much better now. **Note, I also changed the archetype packaging 
version to 3.0.1 as well since this is the latest.**
    
    ```
    {11:39}/tmp ➭ mvn archetype:generate -DarchetypeCatalog=local
    [INFO] Scanning for projects...
    [INFO]
    [INFO] 
------------------------------------------------------------------------
    [INFO] Building Maven Stub Project (No POM) 1
    [INFO] 
------------------------------------------------------------------------
    [INFO]
    [INFO] >>> maven-archetype-plugin:3.0.1:generate (default-cli) > 
generate-sources @ standalone-pom >>>
    [INFO]
    [INFO] <<< maven-archetype-plugin:3.0.1:generate (default-cli) < 
generate-sources @ standalone-pom <<<
    [INFO]
    [INFO]
    [INFO] --- maven-archetype-plugin:3.0.1:generate (default-cli) @ 
standalone-pom ---
    [INFO] Generating project in Interactive mode
    [INFO] No archetype defined. Using maven-archetype-quickstart 
(org.apache.maven.archetypes:maven-archetype-quickstart:1.0)
    Choose archetype:
    1: local -> org.apache.metron:metron-maven-parser-extension-archetype 
(Apache Maven Parser Extension Archetype for Metron)
    Choose a number or apply filter (format: [groupId:]artifactId, case 
sensitive contains): : 1
    Define value for property 'groupId': com.michaelmiklavcic
    Define value for property 'artifactId': hello
    Define value for property 'version' 1.0-SNAPSHOT: : 0.4.1
    Define value for property 'package' com.michaelmiklavcic: :
    Define value for property 'metronVersion': 0.4.1
    Define value for property 'parserClassName' (should match expression 
'^[A-Z].*$'): Hello
    Define value for property 'parserName' (should match expression 
'^[a-z]+[A-Z,a-z]+$'): hello
    Confirm properties configuration:
    groupId: com.michaelmiklavcic
    artifactId: hello
    version: 0.4.1
    package: com.michaelmiklavcic
    metronVersion: 0.4.1
    parserClassName: Hello
    parserName: hello
     Y: : Y
    [INFO] 
----------------------------------------------------------------------------
    [INFO] Using following parameters for creating project from Archetype: 
metron-maven-parser-extension-archetype:0.4.1
    [INFO] 
----------------------------------------------------------------------------
    [INFO] Parameter: groupId, Value: com.michaelmiklavcic
    [INFO] Parameter: artifactId, Value: hello
    [INFO] Parameter: version, Value: 0.4.1
    [INFO] Parameter: package, Value: com.michaelmiklavcic
    [INFO] Parameter: packageInPathFormat, Value: com/michaelmiklavcic
    [INFO] Parameter: parserName, Value: hello
    [INFO] Parameter: package, Value: com.michaelmiklavcic
    [INFO] Parameter: version, Value: 0.4.1
    [INFO] Parameter: metronVersion, Value: 0.4.1
    [INFO] Parameter: groupId, Value: com.michaelmiklavcic
    [INFO] Parameter: parserClassName, Value: Hello
    [INFO] Parameter: artifactId, Value: hello
    [INFO] Parent element not overwritten in 
/private/tmp/hello/metron-parser-hello/pom.xml
    [INFO] Parent element not overwritten in 
/private/tmp/hello/metron-parser-hello-bundle/pom.xml
    [INFO] Parent element not overwritten in 
/private/tmp/hello/metron-parser-hello-assembly/pom.xml
    [INFO] Project created from Archetype in dir: /private/tmp/hello
    [INFO] 
------------------------------------------------------------------------
    [INFO] BUILD SUCCESS
    [INFO] 
------------------------------------------------------------------------
    [INFO] Total time: 32.607 s
    [INFO] Finished at: 2017-08-08T11:40:30-06:00
    [INFO] Final Memory: 16M/309M
    [INFO] 
------------------------------------------------------------------------
    ```
    
    The project names resolve correctly with plugin v3.0.1 and the build for 
the new archetype project runs successfully.


> Create a plugin system for Metron based on 'NAR'
> ------------------------------------------------
>
>                 Key: METRON-777
>                 URL: https://issues.apache.org/jira/browse/METRON-777
>             Project: Metron
>          Issue Type: New Feature
>            Reporter: Otto Fowler
>            Assignee: Otto Fowler
>
> The success of the Metron project will be greatly dependent on community 
> participation, and with that the ability to adapt and extend Metron without 
> having to maintain a fork of the project.
> As organizations and individuals look to extend the Metron system with custom 
> parsers, enrichments, and stellar functions that may be proprietary in 
> nature, the ability to develop and deploy these extensions outside the Metron 
> code base is critically important.
> To that end, and after community discussion and proposal we create or 
> formalize the 'plugin' development story in Metron.  
> The proposal is to adapt the Apache Nifi NAR system for use in Metron.  This 
> will provide the system with:
> * archetype(s) for developer projects and independent development
> * defined packaging and metadata for 'plugin' products
> * loading and instantiation with classloader isolation capabilities
> * removing the necessity for shading plugin jars
> These capabilities will also enable other features, such as plugin lifecycle, 
> plugin configuration+redeployment, and other things.
> The plugin archetypes and their installation will be a followon



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