[Jakarta Commons Wiki] New: How to Configure the Logging Factory and the Logging Class

[co...@jakarta.apache.org]

   Date: 2004-07-09T07:48:12
   Editor: HenningSchmiedehausen <hp...@intermeta.de>
   Wiki: Jakarta Commons Wiki
   Page: How to Configure the Logging Factory and the Logging Class
   URL: http://wiki.apache.org/jakarta-commons/How to Configure the Logging Factory and the Logging Class

   Add a simple page on how to make commons-logging just work. 

New Page:

= How to Configure the Logging Factory and the Logging Class =

One of the questions that popped up on the Turbine mailing list is, why
there is no ''commons-logging.properties'' file for Turbine.

At this point I started wondering, whether one could use this to actually
configure logging for Turbine applications . I looked at the docs and found the 
docs on how to configure the [http://jakarta.apache.org/commons/logging/api/org/apache/commons/logging/package-summary.html LogFactory]
buried three deep in the API docs.

In Turbine 2.3 we have used

{{{
//
// Set up Commons Logging to use the Log4J Logging
//
System.getProperties().setProperty(LogFactory.class.getName(),
                                   Log4jFactory.class.getName());
}}}

to set up the [http://jakarta.apache.org/commons/logging/api/org/apache/commons/logging/package-summary.html LogFactory ] class which is not exactly the most elegant thing
to do.

If you know, where to look, you will find a page in the docs which describes the 
configuration process in detail. [http://jakarta.apache.org/commons/logging/api/org/apache/commons/logging/package-summary.html Look here.]

Please note, that you must still configure the underlying logging layer. So configuring commons-logging
does not give you automatically a fully configured [http://logging.apache.org/log4j/docs/ Log4J ] Logger. 

For a small application without many logging needs, I'd recommend to use the commons-logging.properties method. Put a file called ''commons-logging.properties'' in your class path with the following contents:

{{{
org.apache.commons.logging.Log = org.apache.commons.logging.impl.SimpleLog
}}}

This will use the default Factory class implementation and use the integrated simple Logger to send
logging output to stderr.

[http://jakarta.apache.org/commons/logging/api/org/apache/commons/logging/impl/SimpleLog.html SimpleLog] can even be configured by a properties file called ''simplelog.properties'' on your class path.

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