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https://issues.apache.org/jira/browse/LOG4J2-398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13771166#comment-13771166
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Porfirio Partida commented on LOG4J2-398:
-----------------------------------------
The thing is that the filename is not parsed, however you can pass variables
defined as properties and you can add some contexts there in the property, look
at this example:
{code}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="debug">
<Properties>
<Property name="user">$${sys:user.name}</Property>
<Property name="filename">log/LOG-$${date:yyyy-MM-dd
HHmmss}.log</Property>
</Properties>
<appenders>
<RollingFile name="Rolling" fileName="${filename}"
filePattern="log/LogBackup-%d{MM-yyyy-MM-dd
HHmmss}-%i.log.gz">
<PatternLayout>
<pattern>%d %p %C [%t] %m%n</pattern> <!-- %d
%p %C{1.} [%t] %m%n -->
</PatternLayout>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="500" />
<!-- want to hook a class here to listen to rolling
events after they
occur -->
</RollingFile>
</appenders>
<loggers>
<root level="debug">
<appender-ref ref="Rolling" />
</root>
</loggers>
</Configuration>
{code}
> DateLookup not parsed for FastRollingFile appender
> --------------------------------------------------
>
> Key: LOG4J2-398
> URL: https://issues.apache.org/jira/browse/LOG4J2-398
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-beta8
> Environment: Operating System: Windows Server 2008 R2 SP1
> Java Runtime: 1.7.0_03-x64
> Reporter: Jesse Docken
>
> I'm trying to create a Log4j2 configuration file that will create a log file
> using DateLookup so that the current date and time are in the filename (so it
> matches the logging used in our other products). This is what the appender
> configuration looks like:
> {code:borderStyle=solid|language=XML}
> <FastRollingFile name="Rolling" fileName="log/$${date:yyyyMMdd-HHmmss} -
> myApp.log" filePattern="log/$${date:yyyyMMdd-HHmmss} - myApp-%i.log">
> <immediateFlush>true</immediateFlush>
> <suppressExceptions>false</suppressExceptions>
> <PatternLayout>
> <pattern>%d %p %c{1.} [%t] $${env:USER} %m%n</pattern>
> </PatternLayout>
> <Policies>
> <OnStartupTriggeringPolicy />
> <SizeBasedTriggeringPolicy size="100 MB"/>
> </Policies>
> </FastRollingFile>
> {code}
> However when the log file is generated the filename is "${date". I've tried
> different variations and haven't been able to get this lookup to work at all.
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