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From "Raman Gupta (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (LOG4J2-1686) Support conditional configuration
Date Mon, 14 Nov 2016 04:52:58 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15662760#comment-15662760
] 

Raman Gupta edited comment on LOG4J2-1686 at 11/14/16 4:52 AM:
---------------------------------------------------------------

You seem to have missed my key criticism and one possible solution: "allow *any* element to
have `key` and `keyScript` attributes". This means, one could just as easily do something
like this:

{code:xml}
<Appenders>
  <Console key="key1" keyScript="selector">
    <...>
  </Console>
  <FileAppender key="key2" keyScript="selector">
    ...
  </FileAppender>
</Appenders>
{code}

To do the equivalent of this with the current mechanism, now you have to make an `AppenderSelector`.
The current approach works but is not general enough.


was (Author: rocketraman):
You seem to have missed my key criticism and one possible solution: "allow *any* element to
have `key` and `keyScript` attributes". This means, one could just as easily do something
like this:

{code:xml}
<Appenders>
  <Console key="key1" keyScript="selector">
    <...>
  </Console>
  <FileAppender key="key2" keyScript="selector">
    ...
  </FileAppender>
</Appenders>
{code}

To do the equivalent of this with the current mechanism, now you have to make an `AppenderSelector`.
Then you have to make a `LoggerSelector`. And on and on. Its not a general conditional solution.

> Support conditional configuration
> ---------------------------------
>
>                 Key: LOG4J2-1686
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1686
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: Configurators
>    Affects Versions: 2.7
>            Reporter: Raman Gupta
>            Priority: Blocker
>
> It would be great to support conditional configuration like logback:
> http://logback.qos.ch/manual/configuration.html#conditional
> This allows for more advanced configuration than is currently possible with property
substitution.
> Example use case: to implement https://issues.apache.org/jira/browse/LOG4J2-1685 without
log4j library support.



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