DOMConfigurator and the Observe pattern.

[mi...@nl.abnamro.com]

Hi all,

I'm working on al little project to create an observer pattern around the DOMConfigurator of log4j. (I'm using 1.2.3 b.t.w.)
To do this I've created an ObservableDOMConfigurator which extends DOMConfigurator. It has extra methods to make it a subject. (addObserver,
removeObserver, getObservers and inform)
To inform all observers the subject has changed I overrided the doConfigure(String filename, LoggerRepository hierarchy) which does a
super.doConfigure() and next a this.inform().
Since this didn't work I looked into the log4j code to see what actually happens. I found the following code is called when a change to the config
file is noticed:

public
void doOnChange() {
    new DOMConfigurator().doConfigure(filename,
        LogManager.getLoggerRepository());
  }

This code makes it impossible to override the doConfigure method. I'm pretty sure this is done for a reason, but can anyone explain me why this is
done and not the following is done:

public
void doOnChange() {
    doConfigure(filename,
        LogManager.getLoggerRepository());
  }

Regards,

Misja Heuveling.
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