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https://issues.apache.org/jira/browse/LOG4NET-325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13288114#comment-13288114
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Stefan Bodewig commented on LOG4NET-325:
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IIUC you don't want the pattern converter (which deals with logging events) but
the parser for configuration to deal with properties, right?
The specific case of file names could be dealt with inside the FileAppender
class where the file name could be expanded during the ActivateOptions method.
For a more general solution you'd have to modify the configurators
(XmlConfigurator at least) and parsing the configuration would have to be done
in two phases. The first one would only read the properties and the second one
would have to apply them. We'd probably need to define our own syntax of
expanding properties to prevent %property{} being replaced in legitimate
logging patterns.
> Scan repository properties in PropertyPatternConverter
> ------------------------------------------------------
>
> Key: LOG4NET-325
> URL: https://issues.apache.org/jira/browse/LOG4NET-325
> Project: Log4net
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.2.12
> Reporter: Michal Sznajder
>
> With https://issues.apache.org/jira/browse/LOG4NET-53 log4net got possibility
> to configure properties from config file.
> It would be nice to see that PropertyPatternConverter supports this
> improvement. This would simplify configuring
> multiple FileAppenders by only once specifying where log should be stored,
> eg.:
> <?xml version="1.0" encoding="utf-8" ?>
> <log4net>
> <property>
> <key value="ROOT_LOG_DIR" />
> <value value="c:\logs" />
> </property>
> <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
> <file type="log4net.Util.PatternString"
> value="%property{ROOT_LOG_DIR}\logs.txt" />
> </appender>
> <appender name="RollingFile2" type="log4net.Appender.RollingFileAppender">
> <file type="log4net.Util.PatternString"
> value="%property{ROOT_LOG_DIR}\logs2.txt" />
> </appender>
> <root>
> <level value="ALL" />
> <appender-ref ref="RollingFile" />
> <appender-ref ref="RollingFile2" />
> </root>
> </log4net>
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