Hi Ceki, Variable substition wouldn't accomplish what I want to achieve... or would it? :)
My goal is to set the log filename in a dynamic way - retrieve it from an LDAP configuration. I don't want it hardcoded in the logback.xml. My understanding is that variable substition only works if the variable comes from an external properties file or set in system property. thanks, Jenny --- On Thu, 11/13/08, Ceki Gulcu <[EMAIL PROTECTED]> wrote: > From: Ceki Gulcu <[EMAIL PROTECTED]> > Subject: Re: [logback-user] Setting log filename during runtime > To: "logback users list" <[email protected]> > Date: Thursday, November 13, 2008, 4:11 PM > Hello Jenny, > > Why are you setting the passing value of > "logFileName" MDC? Just set it as a > variable, see http://logback.qos.ch/manual/joran.html and > search for "Variable > substitution". > > HTH, > > Jenny wrote: > > Hi, I'm not sure if this is the preferred way or > best practice... but what I did was extend the > RollingFileAppender and override the getFile() method. > > > > and this getFile() method retrieves / generates the > log file name. > > > > please let me know if you have better solutions. > > > > thanks, > > Jenny > > > > ============================================= > > From: Jenny [EMAIL PROTECTED] > > Subject: Re: [logback-user] Setting log filename > during runtime > > To: "logback users list" [email protected] > > > > 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 > > > > > > > > _______________________________________________ > > Logback-user mailing list > > [email protected] > > http://qos.ch/mailman/listinfo/logback-user > > -- > Ceki Gülcü > Logback: The reliable, generic, fast and flexible logging > framework for Java. > http://logback.qos.ch > _______________________________________________ > Logback-user mailing list > [email protected] > http://qos.ch/mailman/listinfo/logback-user _______________________________________________ Logback-user mailing list [email protected] http://qos.ch/mailman/listinfo/logback-user
