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From José Antonio Pérez Testa <>
Subject Re: [logging] How to get logging to use new Monolog subclass
Date Mon, 10 May 2004 09:12:23 GMT
By default Commons Logging uses Log4j implementation, if the libraries 
are available on the classpath you should be able to log to a Log4j 
implementation without no configuration (apart from or 
equivalent xml file).
I am writing logs to log4j with Commons Logging in many projects and the 
only difficults I've found  were with AppServer precedence of libraries.
You should try to configure log4j implementation first, and when this 
implementation works give a try with Monolog

Simon Kitching wrote:

>On Mon, 2004-05-10 at 20:22, Igor Smirnov wrote:
>>Hollowing Simon's suggestion, I am posting the same question under another
>>And to be more specific: I am working tiwht Monolog logger that implements
>>and extends log4j functionality. I needed a new Log impl. in commons logging
>>to be able to use Monolog logger with tomcat.
>>Hopefully this clears it up. And here's the first post:
>>I've working with commons logging for the past week and have implemented a
>>new logger within for my needs.
>>Now, since I am not confortable with the whole commons package yet and the
>>user's guide doesn't help much, could anyone explain me step by step how to
>>set-up my system to use the new logger?
>Cool, I'll have to look into monolog a bit.
>As Jose mentioned, you can just set a system property on the jvm command
>  java -Dorg.apache.commons.logging.Log=your.log.class
>(described in the LogFactoryImpl javadoc)
>This is fine for debugging, but isn't very nice when building
>frameworks, etc. But from a quick peek at the code, it looks like you
>can also create a file "" and put it in the
>classpath, with these contents:
>And as a third option, it looks like you could define your own
>LogFactory subclass, and then specify it by creating a file:
>  META-INF/services/org.apache.commons.logging.LogFactory
>with its first line being:
>  your.logfactory.class
>I've only used the -D approach myself, so the above might be wrong. As
>always, the source code is the official and final documentation! The
>LogFactory and LogFactoryImpl classes are the ones that control all this
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