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https://issues.apache.org/jira/browse/METRON-777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16117977#comment-16117977
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ASF GitHub Bot commented on METRON-777:
---------------------------------------

Github user mattf-horton commented on a diff in the pull request:

    https://github.com/apache/metron/pull/530#discussion_r131773714
  
    --- Diff: 
metron-maven-archetypes/metron-maven-parser-extension-archetype/pom.xml ---
    @@ -0,0 +1,46 @@
    +<?xml version="1.0" encoding="UTF-8"?>
    +<!--
    +  Licensed to the Apache Software Foundation (ASF) under one or more
    +  contributor license agreements. See the NOTICE file distributed with
    +  this work for additional information regarding copyright ownership.
    +  The ASF licenses this file to You under the Apache License, Version 2.0
    +  (the "License"); you may not use this file except in compliance with
    +  the License. You may obtain a copy of the License at
    +  http://www.apache.org/licenses/LICENSE-2.0
    +  Unless required by applicable law or agreed to in writing, software
    +  distributed under the License is distributed on an "AS IS" BASIS,
    +  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    +  See the License for the specific language governing permissions and
    +  limitations under the License.
    +-->
    +<project xmlns="http://maven.apache.org/POM/4.0.0"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
http://maven.apache.org/xsd/maven-4.0.0.xsd";>
    +  <modelVersion>4.0.0</modelVersion>
    +
    +  <groupId>org.apache.metron</groupId>
    +  <artifactId>metron-maven-parser-extension-archetype</artifactId>
    +  <version>0.4.1</version>
    +  <packaging>maven-archetype</packaging>
    +
    +  <name>metron-maven-parser-extension-archetype</name>
    +
    +  <build>
    +    <extensions>
    +      <extension>
    +        <groupId>org.apache.maven.archetype</groupId>
    +        <artifactId>archetype-packaging</artifactId>
    +        <version>3.0.0</version>
    +      </extension>
    +    </extensions>
    +
    +    <pluginManagement>
    +      <plugins>
    +        <plugin>
    +          <artifactId>maven-archetype-plugin</artifactId>
    +          <version>3.0.1</version>
    +        </plugin>
    --- End diff --
    
    So this isn't a bug, I would just like to understand: The archetype is 
dependent on maven-archetype-plugin.  Does it generate things dependent on 
bundles-maven-plugin?  If so, where is that declared?  If not, who IS dependent 
on bundles-maven-plugin?  Thx.


> 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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