[logback-user] Programmatic logback Configuration

Chad La Joie chad.lajoie at switch.ch
Mon Nov 5 11:06:56 CET 2007

I apologize for being pushy.  Are there others on this list?  Should I 
be using a different list?

Chad La Joie wrote:
> I have an application that ships with two logging configuration files;
> a default logback.xml file (DLF) included in the application JAR and a 
> user-editable file (UEF) installed on the filesystem with other 
> application configuration files.  The DLF is used when the application 
> is starting but before the code to read in the UEF is executed.
> My current code for reading in the UEF looks like this:
> LoggerContext loggerContext = (LoggerContext) 
> LoggerFactory.getILoggerFactory();
> loggerContext.shutdownAndReset();
> JoranConfigurator configurator = new JoranConfigurator();
> configurator.setContext(loggerContext);
> configurator.doConfigure(configuration.getInputStream());
> loggerContext.start();
> The behavior I'm seeing though is note quite what I expected.  Assume 
> the DLF contains a console appender and a logger definition for package 
> "foo".  The behavior I see when the UEF is loaded is:
>   - Changes to the logger FOO (e.g. changes in the logging level, 
> addition/removal of appenders, etc.) are picked up and become active.
>   - Declaration of new appenders are picked up and become active (e.g. 
> if a new file appender is defined I can see it creating the new log file).
>   - Declaration of new loggers are *not* picked up.  If, for example, a 
> logger "bar" is defined and given the same console appender as "foo" no 
> output from "bar" is sent to the console.
> Is this expected behavior?  Is my code wrong (I've tried the same code 
> without the start() or shutdownAndReset() method calls)?
> Any help would be appreciated.

Serving Swiss Universities
Chad La Joie, Software Engineer, Security
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 75, fax +41 44 268 15 68
chad.lajoie at switch.ch, http://www.switch.ch

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