Thomas,
Here is some code I was given, and some that I wrote to do a very basic
configuration. Regarding the class of the Configurator and doing the
configuration, I would recommend looking at the static initializer in the
Category class. I think it does what you want or will at least point you in
the right direction. I found it to be very informative when figuring this
stuff out.
-Mark
...
static {
// if it appears that log4j is not configured, then set up
// a default configuration so that at least warning or above
end
// up in the console.
if (!isConfigured()) {
doBaseConfigure();
}
}
...
/**
This code (from Ceki Gülcü) checks to see if there are any
appenders defined for log4j
which is the definitive way to tell if log4j is already
initialised
**/
private static boolean isConfigured() {
Enumeration enum = Category.getRoot().getAllAppenders();
if (!(enum instanceof
org.apache.log4j.helpers.NullEnumeration)) {
return true;
}
else {
Enumeration cats = Category.getCurrentCategories();
while (cats.hasMoreElements()) {
Category c = (Category) cats.nextElement();
if (!(c.getAllAppenders() instanceof
org.apache.log4j.helpers.NullEnumeration))
return true;
}
}
return false;
}
private static void doBaseConfigure() {
// set up the default configuration
Layout layout = new PatternLayout("%d{ABSOLUTE} %-5p %c{1}
%x : %m%n");
Appender appender = new ConsoleAppender(layout);
Category root = Category.getRoot();
root.addAppender(appender);
root.setPriority(Priority.WARN);
root.warn("Log4j not configured, base configuration
(ConsoleAppender/WARN) applied to root category");
}
-----Original Message-----
From: Thomas Tuft Muller [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, August 14, 2001 4:08 AM
To: [EMAIL PROTECTED]
Subject: Detect already configured log4j
Hi,
I know this has been asked before, but: How do I proceede to detect that
log4j is already configured?
Also: How do I configure log4j with BasicConfigurator from property settings
(the {log4.configuration} system property must identify an class
implementing Configurator and BasicConfigurator does not(!) )?
--
Thomas
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