RE: clean start. Logging in tomcat 559

["Pawson, David" <Da...@rnib.org.uk>]

Now I have logging working.
Using log4j-1.2.9

My application is 'hub'

put the properties file named log4j.properties in tc's classpath
(I use webapps/hub/WEB-INF/classes )

put the log4j-1.2.9.jar into webapps/hub/WEB-INF/lib

Init as follows:

//jakarta log4j
import org.apache.log4j.*;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Level;

	Logger lg = Logger.getLogger("hub1");
The 'name' (hubl) is arbitrary, read the log4j manual for more.
then use as needed, e.g.

	lg.error("** hub logging started **");

The properties file I used is below.
It produces output in ${catalina.home}/logs/tomcat.log
as specified in the properties file


log4j.rootLogger=DEBUG, hubl
#log4j.appender.hubl=org.apache.log4j.ConsoleAppender
log4j.appender.hubl=org.apache.log4j.RollingFileAppender
log4j.appender.hubl.File=/tomcat559/logs/tomcat.log 
log4j.appender.hubl.MaxFileSize=1MB
log4j.appender.hubl.MaxBackupIndex=3
log4j.appender.hubl.layout=org.apache.log4j.PatternLayout
log4j.appender.hubl.layout.ConversionPattern=<e><t>%d{yyyy-MMM-dd HH:mm}</t><lvl>%-5p</lvl><m>%m</m></e>%n

You may not want output in XML format, in which case again
go do some reading.
http://logging.apache.org/log4j/docs/api/org/apache/log4j/PatternLayout.html  (warning, long url)
provides the full story.

http://logging.apache.org/log4j/docs/manual.html is worth reading,
and I found
http://supportweb.cs.bham.ac.uk/documentation/tutorials/docsystem/build/tutorials/log4j/log4j.html to be useful.


Perhaps the tomcat documentation might benefit from such a tiny inclusion?

HTH DaveP.


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