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https://issues.apache.org/jira/browse/LOG4J2-321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13722059#comment-13722059
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Remko Popma commented on LOG4J2-321:
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I don't like the additional element. At the moment there is a hierarchy in the
configuration: {{configuration}} encapsulates all and contains global
attributes that pertain to all elements. Inside configuration there is an
{{appenders}} and a {{loggers}} section. These are independent of each other
unless they are linked with a {{-ref}} element. This is all very clean and
intuitive. For illustration purposes, the basic skeleton looks like this:
{code}
<configuration>
<appenders>
..
</appenders>
<loggers>
..
</loggers>
</configuration>
{code}
I think keeping all global settings in the {{<configuration>}} element should
be preferred because these settings apply to everything in the config.
Introducing a new element just because some attributes are related is confusing
and raises all kinds of questions for our users, for example: _I understand
what loggers and appenders do, but what is a jmx? Can I have more than one? Do
I need to hook it to one of my loggers with a jmx-ref element? And what about
the AsyncLoggerConfig element, does this relate to {{<asyncRoot>}}? Does it
need a ref? Do I need a separate {{<AsyncLoggerConfig>}} element for each
{{<asyncLogger>}}?_
> Provide configuration alternative to system properties
> ------------------------------------------------------
>
> Key: LOG4J2-321
> URL: https://issues.apache.org/jira/browse/LOG4J2-321
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.0-beta8
> Reporter: Remko Popma
> Fix For: 2.0-beta9
>
>
> Some components behaviour cannot be configured in the configuration file but
> only with System properties. There is a strong preference to ensure all
> behaviour can be configured in the configuration file.
> Properties that can be used to configure AsyncLoggers when all loggers are
> Async:
> *
> Log4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector
> * AsyncLogger.ExceptionHandler
> * AsyncLogger.RingBufferSize
> * AsyncLogger.WaitStrategy
> * log4j.Clock - currently only used for timestamping RingBufferLogEvents.
> Question: Should all LogEvents use this clock?
> The following system properties can be used to configure mixed Async Loggers:
> * AsyncLoggerConfig.ExceptionHandler
> * AsyncLoggerConfig.RingBufferSize
> * AsyncLoggerConfig.WaitStrategy
> For JMX there is only the one "disable" property, in the mailing list it was
> suggested to make this into an element rather than an attribute to
> future-proof it.
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