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 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 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. 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 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.
SimpleLog can even be configured by a properties file called simplelog.properties on your class path.
Also see Log4JLogger