commons-logging properties simplelog

The commons-logging.properties can configure build-in logging. I always loose track of the properties. Here the
link

commons-logging.properties or simplelog.properties

priority=1
org.apache.commons.logging.LogFactory=org.apache.commons.logging.impl.LogFactoryImpl
org.apache.commons.logging.Log=org.apache.commons.logging.impl.SimpleLog
org.apache.commons.logging.simplelog.defaultlog=debug

SimpleLog sends all (enabled) log messages, for all defined loggers, to System.err. The following system properties are supported to configure the behavior of this logger:

* org.apache.commons.logging.simplelog.defaultlog - Default logging detail level for all instances of SimpleLog. Must be one of:
o trace
o debug
o info
o warn
o error
o fatal
If not specified, defaults to info.
* org.apache.commons.logging.simplelog.log.xxxxx - Logging detail level for a SimpleLog instance named "xxxxx". Must be one of:
o trace
o debug
o info
o warn
o error
o fatal
If not specified, the default logging detail level is used.
* org.apache.commons.logging.simplelog.showlogname - Set to true if you want the Log instance name to be included in output messages. Defaults to false.
* org.apache.commons.logging.simplelog.showShortLogname - Set to true if you want the last component of the name to be included in output messages. Defaults to true.
* org.apache.commons.logging.simplelog.showdatetime - Set to true if you want the current date and time to be included in output messages. Default is false.
* org.apache.commons.logging.simplelog.dateTimeFormat - The date and time format to be used in the output messages. The pattern describing the date and time format is the same that is used in java.text.SimpleDateFormat. If the format is not specified or is invalid, the default format is used. The default format is yyyy/MM/dd HH:mm:ss:SSS zzz.

In addition to looking for system properties with the names specified above, this implementation also checks for a class loader resource named "simplelog.properties", and includes any matching definitions from this resource (if it exists).