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From "Nicko Cadell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LOG4NET-108) [PATCH] add support for multiple evaluators in BufferingAppenderSkeletan
Date Tue, 13 Feb 2007 00:12:05 GMT

    [ https://issues.apache.org/jira/browse/LOG4NET-108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12472479

Nicko Cadell commented on LOG4NET-108:

It would be possible to implement this feature without modifying the BufferingAppenderSkeleton
but rather by building another ITriggeringEventEvaluator that holds a collection of child
This is in some ways more flexible because it can be used everywhere a ITriggeringEventEvaluator
is allowed.

If the implementation is added directly to the BufferingAppenderSkeleton then what strategy
should be employed in deciding when to _trigger_. Any evaluator / all evaluators / or a combination?
Once this is embedded in the BufferingAppenderSkeleton this would be hard to change, and someone
will come up with a convincing argument as to why the implemented strategy is not appropriate
for them.

If the strategy is delegated to the implementation of the ITriggeringEventEvaluator then this
becomes much more extensible. An ITriggeringEventEvaluator  can be written by anyone and deployed
in any DLL not just in the log4net DLL.

> [PATCH] add support for multiple evaluators in BufferingAppenderSkeletan
> ------------------------------------------------------------------------
>                 Key: LOG4NET-108
>                 URL: https://issues.apache.org/jira/browse/LOG4NET-108
>             Project: Log4net
>          Issue Type: Improvement
>          Components: Appenders, Core
>            Reporter: Drew Schaeffer
>            Priority: Minor
>         Attachments: EvaluatorCollection.cs, patch-file.diff
> Currently BufferedAppenders only have support for one evaluator and one lossy evaluator.
 This is fine when the only available evaluator is LevelEvaluator (as multriple LevelEvaluators
do not make sense) but with the addition of ExceptionEvaluator (LOG4NET-107) it would be nice
for BufferingAppenderSkeletan to have a collection of evaluators.

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