Hi there, I just started using log4j and commons-logging (I use commons-logging-1.0.2 and log4j-1.2.7) and am now stuck with a small problem (well, it's not really a serious problem, but I'm curious...).
I have a commons-logging.properties file which is found at startup of my program (this was validated by specifiying a different LogFactory to use JLEA [http://www.jlea.de/] - which works). Now, from what I understand, if I do not specify any particular LogFactory in that file, commons-logging will choose org.apache.commons.logging.impl.LogFactoryImpl as the default factory. If I include the log4j JAR files in my project (and configure log4j the right way), log4j is used and works perfectly. But then I started playing around with the org.apache.commons.logging.Log property. The documentation of the default factory says: "When a new Log instance must be created, the default LogFactory implementation uses the following discovery process is used: * Look for a system property named org.apache.commons.logging.Log [...] * Look for a configuration attribute of this factory named org.apache.commons.logging.Log. * If the Log4J logging system is available in the application class path, use the corresponding wrapper class (Log4JCategoryLog). [...]" Following this, I tried to override the use of log4j by putting the following line into my commons-logging.properties-file: org.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog No I would expect the log output to disappear (as NoOpLog just throws away everything). But this only happens, if I remove the log4j jar from my project - otherwise, still log4j is used (and the Log-property above seems to be ignored). Even if I define this as a system-property in my java call: java -Dorg.apache.commons.logging.Log=\ org.apache.commons.logging.impl.NoOpLog ... the behaviour is as described above: Still,log4j is used. Is this the expected behavior (if log4j is available, always use it in favor of all "SimpleLog" or "NoOpLog" implementations - so the docs are wrong here!), or did I read the wrong part of the docs? Or did I do any other mistake? (Actually, I'll never use SimpleLog or NoOpLog, so it's more a academical kind of question, but as I said: I'm just curious. :-) Thanks in advance Jonas -- Jonas Rathert | IT Architect PLATINION GmbH A Company of the Boston Consulting Group Im Mediapark 5, 50670 Cologne/Germany Tel. +49 221. 58 95 83 04, Mobile +49 160. 532 13 04 Fax +49 221. 589 20 51 mailto:[EMAIL PROTECTED] http://www.platinion.de/ -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
