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From "Remko Popma (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (LOG4J2-486) RollingFile Appender - add custom info at the start of each logfile
Date Tue, 07 Jan 2014 13:23:51 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13864210#comment-13864210
] 

Remko Popma edited comment on LOG4J2-486 at 1/7/14 1:23 PM:
------------------------------------------------------------

I think you can try the same thing: 
{code}
@Plugin name="HeaderLayout" ...
public class MyLayout extends [standard log4j PatternLayout class]...
{code}

and in config you replace {{PatternLayout}} elements with {{HeaderLayout}} elements. 



was (Author: remkop@yahoo.com):
I think you can try the same thing: 
{code}
@Plugin name="HeaderLayout" ...
public class MyLayout extends [standard log4j Layout class]...
{code}

and in config you replace {{Layout}} elements with {{HeaderLayout}} elements. 


> 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
>         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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