Re: log4j - different logger instances

Lew <>
Thu, 29 Apr 2010 19:45:42 -0400
John Smith wrote:

I want to create a new logger instance that will simultaniusly log to
another file. I was able to do that programatically.
So when I instantiate the logger like this:

Logger logger = Logger.getLogger("AnotherLogger");

it writes to a separate log file "AnotherLogFile.txt".

I do not like the idea to hard-code the appender instantiation.

Layout layout = new PatternLayout("%d %-5p %m%n");
RollingFileAppender rfa = new RollingFileAppender(layout,



The question is can I configure this via

What have you been able to do with so far?

Try (using your own folders, files and package names, of course):

log4j.rootCategory = WARN, A = WARN, F = DEBUG, X

log4j.appender.A = org.apache.log4j.ConsoleAppender
log4j.appender.A.layout = org.apache.log4j.PatternLayout

log4j.appender.F = org.apache.log4j.RollingFileAppender
log4j.appender.F.layout = org.apache.log4j.PatternLayout
log4j.appender.F.File = /projects/mouser/logs/lewscanon.log
log4j.appender.F.MaxFileSize = 512KB
log4j.appender.F.MaxBackupIndex = 2

log4j.appender.X = org.apache.log4j.RollingFileAppender
log4j.appender.X.layout = org.apache.log4j.PatternLayout
log4j.appender.X.File = /projects/mouser/logs/mouser.log
log4j.appender.X.MaxFileSize = 512KB
log4j.appender.X.MaxBackupIndex = 2

log4j.appender.A.layout.ConversionPattern= %d %-16c{1}:%-39m %-t %x%n
log4j.appender.F.layout.ConversionPattern= %d %-16c{1}:%-39m %-t %x%n
log4j.appender.X.layout.ConversionPattern= %d %-16c{1}:%-39m %-t %x%n


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