[logback-user] Setting log filename during runtime

[Jenny]

Hello,

How can i set the log filename set during the init() of my StartupServlet.

I tried using MDC but it's not working for me.

What happens is the file is not created. Instead a file with name "%exp{logFileName}" is created on my web server's bin directory.

In my StartupServlet, I have this init method that calls MDC.put().

public void init() throws ServletException {
MDC.put("logFileName", "c:\\testlogs\\test.log");
Logger log = LoggerFactory.getLogger(StartupServlet.class); 
log.info("This should be logged");
}

In my logback.xml, I have a MDC.get().

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<append>true</append>
<expression name="logFileName">MDC.get("logFileName")</expression>
<file>%exp{logFileName}</file>
...

I'm new with logback, thanks in advance for your help! I'm trying to follow Ceki's example in his blog
http://ceki.blogspot.com/2006/10/repated-configuration-with-joran.html

thanks,
jenny


      
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