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https://issues.apache.org/jira/browse/LOG4J2-486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13866421#comment-13866421
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Remko Popma commented on LOG4J2-486:
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Ralph, I saw Gary's suggestion but missed your response about interpolation.
Sorry for the confusion.
I guess the header/footer values could become quite lengthy, hence the idea to
put the value in a separate file?
My proposal (as an alternative to separate files) was to add header and footer
attributes to the Layout config elements. (And the configured values for these
attributes could also be interpolated.)
I don't have a preference for how to do this (or for when to do this, for that
matter. It seems like a "nice to have" kind of feature...)
> RollingFile Appender - add custom info at the start of each logfile
> -------------------------------------------------------------------
>
> Key: LOG4J2-486
> URL: https://issues.apache.org/jira/browse/LOG4J2-486
> Project: Log4j 2
> Issue Type: Question
> Components: Appenders
> Affects Versions: 2.0-beta9
> Environment: Java 1.7, Linux
> Reporter: Joe Merten
> Fix For: 2.0-beta9
>
> Attachments: MyRolloverStrategy.java, log4j2.xml
>
>
> I post this question here because of a hint of Remko Popma.
> See also:
> *
> http://apache-logging.6191.n7.nabble.com/log4j2-getting-started-amp-rolling-files-tt8406.html#a42402
> *
> http://stackoverflow.com/questions/20819376/log4j2-rollingfile-appender-add-custom-info-at-the-start-of-each-logfile
> I want to add some custom info at the top of each logfile, like the version
> string of my application, the application uptime and the system uptime. And
> even writing some »bye, bye / eof« to the bottom of the just closed logfile
> would also be fine.
> Because there is no appropriate hook or callback to get notified when the
> RollingFileAppander is creating / has created a new file, so that I can put
> my things at first into these new logfile, I tried to extend
> DefaultRolloverStrategy. But currently, I stuck at some points.
> Seems that I have to deal with {{@Plugin}} and {{@PluginFactory}}. My try
> with the attached log4j2.xml and MyRolloverStrategy.java compiles without
> errors and warnings. But when I start the application, I get this error
> message:
> {{2014-01-05 23:22:05,876 ERROR RollingFile contains an invalid element or
> attribute "MyRolloverStrategy"}}
> And then the next step would be: "how to write to the logfiles within my
> rollover method?"
> log4j2.xml :
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration>
> <Properties>
> <Property name="projectPrefix">Tts</Property>
> <Property name="rawPattern">%d %-5p [%t] %C{2} (%F:%L) - %m%n</Property>
> <Property name="coloredPattern">%d %highlight{%-5p}{FATAL=bright red,
> ERROR=red, WARN=yellow, INFO=cyan, DEBUG=green, TRACE=bright blue}
> %style{[%t] %C{2} (%F:%L) -}{bright,black} %m%n</Property>
> <Property name="coloredShortPattern">%d %highlight{%-5p}{FATAL=bright
> red, ERROR=red, WARN=yellow, INFO=cyan, DEBUG=green, TRACE=bright blue}
> %style{[%t] -}{bright,black} %m%n</Property>
> <Property name="fileName">Log/${projectPrefix}.log</Property>
> <Property name="filePattern">Log/${projectPrefix}-%i.log</Property>
> </Properties>
> <Appenders>
> <Console name="Stdout" target="SYSTEM_OUT">
> <PatternLayout pattern="${coloredPattern}"/>
> </Console>
> <RollingFile name="Logfile" fileName="${fileName}"
> filePattern="${filePattern}">
> <PatternLayout pattern="${rawPattern}"/>
> <Policies>
> <SizeBasedTriggeringPolicy size="16 MB"/>
> </Policies>
> <eeo.toolbox.MyRolloverStrategy fileIndex="min" max="16"/>
> </RollingFile>
> </Appenders>
> <Loggers>
> <Root level="info">
> <AppenderRef ref="Stdout"/>
> <AppenderRef ref="Logfile"/>
> </Root>
> </Loggers>
> </Configuration>
> {code}
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