[logback-user] file name question

Ceki Gulcu ceki at qos.ch
Tue Feb 3 11:52:05 CET 2009

Hello Neil,

It might be useful to know that if you don't specify the <file> property for 
RollingFileAppender, then the DateBasedRollingPolicy (but not 
FixedWindowRollingPolicy) will set the name of the active log file as computed 
by the value of <FileNamePattern> *and* the current date.

Coming back your question, there is no way to vary the file name as specified by 
the <file> property. There is already  issue LBCORE-68 related to the same 
topic. You are welcome to vote on it.

Your second question about the timezone for the %d converter, please enter a 
jira issue, as if my memory serves me correctly, there is no way to set the 
timezone for this parameter.

Neil Lott wrote:
> Here's my appender snippet.
>       <appender name="MSA_LOG" 
> class="ch.qos.logback.core.rolling.RollingFileAppender">
>         <file>/usr/local/mystro/logs/msa-mdn.log</file>
>         <append>true</append>
>         <rollingPolicy 
> class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
> <FileNamePattern>/usr/local/neil/logs/msa-mdn-%i-%d{yyyyMMdd-HHmmss}.log</FileNamePattern> 
>             <MinIndex>1</MinIndex>
>             <MaxIndex>5</MaxIndex>
>         </rollingPolicy>
>         <triggeringPolicy 
> class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
>             <MaxFileSize>10MB</MaxFileSize>
>         </triggeringPolicy>
>         <layout class="ch.qos.logback.classic.PatternLayout">
>             <Pattern> { %d{yyyyMMdd HHmmss.SSS} %msg \} %n</Pattern>
>         </layout>
>     </appender>
> I'd like to be able to start with a file name pattern for my initial 
> file.  Is there a way to do this?  So instead of
> msa-mdn.log I'd like to have msa-mdn-0-20090203-042416.log or whatever 
> the current time is as my initial file name.
> Also, I'd like to %d{yyyyMMdd-HHmmss} to have my date formatted in GMT 
> time not local.  How would I go about doing this?
> Thanks,
> Neil

Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.

More information about the Logback-user mailing list