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From "Gary Gregory (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1741) scala: add support for creating custom plugins
Date Mon, 19 Dec 2016 13:23:59 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15761148#comment-15761148

Gary Gregory commented on LOG4J2-1741:

Even though it is more code, I think we should use Builders when we (Log4j devs) write code
examples to promote future proofing for binary compatibility. It might be a bit of YAGNI,
but I've not met an Appender yet that does not another feature at some point.

> scala: add support for creating custom plugins
> ----------------------------------------------
>                 Key: LOG4J2-1741
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1741
>             Project: Log4j 2
>          Issue Type: Improvement
>          Components: Plugins
>            Reporter: PJ Fanning
>            Assignee: Mikael Ståldal
>              Labels: scala
>         Attachments: log4j2-sample.zip
> I tried to add a custom appender using Scala but the pattern of having a class with an
Plugin annotation and a static method on that class with a PluginFactory or PluginBuilderFactory
annotation doesn't seem to work in Scala.
> In Scala, you can create a companion object to a class where you can implement the equivalent
of static methods but these are not the same class under the hood. The Scala compiler builds
2 or more classes, the companion object gets a class name with a $ appended to it. I think
this is affecting the lookup for the method with the Factory annotation.

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