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https://issues.apache.org/jira/browse/LOG4J2-1741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15761152#comment-15761152
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Mikael Ståldal commented on LOG4J2-1741:
----------------------------------------
The problem is that you have put the @PluginFactory annotation on the object,
and not on the {{createAppender}} method. If you change it like this, it will
work:
{code}
object KafkaLog4jAppender {
@PluginFactory
def createAppender(
@PluginAttribute("name") name: String,
@PluginElement("Layout") layout: Layout[_ <: Serializable],
@PluginElement("Filters") filter: Filter): KafkaLog4jAppender = {
new KafkaLog4jAppender(name, filter, layout)
}
}
{code}
> 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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