ASF GitHub Bot commented on METRON-777:

Github user mattf-horton commented on the issue:

    I've opened METRON-1099 for integration tests regarding the two items I'm 
not sure from code inspection will work right.  But I'm not making this review 
dependent on them because they are a significant amount of work, and even if 
they show problems, this PR is a useful start on functionality.  But I would 
encourage you to implement such tests reasonably soon, since we expect to 
convert most of the existing parsers to be bundles.
    Also opened METRON-1100 and METRON-1101 for the two most obvious 
enhancements to Bundle functionality, but these are definitely next-gen things.

> 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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