[
https://issues.apache.org/jira/browse/METRON-777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16104053#comment-16104053
]
ASF GitHub Bot commented on METRON-777:
---------------------------------------
Github user ottobackwards commented on the issue:
https://github.com/apache/metron/pull/530
```bash
.
├── java
│ └── org
│ └── apache
│ └── metron
│ ├── bundles
│ │ ├── AbstractFoo.java -> CREATED -> replaces Nifi
abstract class AbstractProcessor
│ │ ├── BundleThreadContextClassLoaderTest.java -> MOVED
from
/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-nar-utils/src/test/java/org/apache/nifi/nar/NarThreadContextClassLoaderTest.java
│ │ ├── BundleUnpackerTest.java ->MOVED from
/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-nar-utils/src/test/java/org/apache/nifi/nar/NarUnpackerTest.java
│ │ ├── BundleUtilTest.java -> RENAMED
NarBundleUtilTest.java
│ │ ├── ExtensionClassInitializerTest.java -> CREATED
│ │ ├── integration
│ │ │ └── BundleUnpackerIntegrationTest.java -> CREATED
-> version of Unpacker test, but against HDFS
│ │ └── util
│ │ └── TestUtil.java -> CREATED
│ └── parsers
│ └── interfaces
│ └── MessageParser.java -> CREATED, for matching
classes in test bundles
└── resources
├── BundleUnpacker -> Properties and bundles to validate loading and
mapping
│ ├── conf
│ │ └── bundle.properties
│ ├── lib
│ │ └── metron-parser-bar-bundle-0.4.1.bundle
│ └── lib2
│ └── metron-parser-foo-bundle-0.4.1.bundle
├── META-INF
│ └── services
│ └── org.apache.metron.bundles.AbstractFoo
├── bundle.properties
└── utils-bundles -> MANIFESTS to test reading and parsing
├── bundle-with-versioning
│ └── META-INF
│ └── MANIFEST.MF
├── bundle-without-dependency
│ └── META-INF
│ └── MANIFEST.MF
└── bundle-without-versioning
└── META-INF
└── MANIFEST.MF
```
> 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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