Log4j - How to direct log messages to their respective log message file

[Anutosh Swamy]

Hi,

Can any one help me with directing the log messages in Log4j to their respective logger files.

For example:

I need to direct the INFO level messages to info-logger.log file
WARN level message to warn-logger.log file
ERROR level message to error-logger.log file and so on

and no file will have the messages from different level loggers, means info-logger.log file will have INFO level messages only and not the WARN or ERROR level messages and so on.

NOTE:: I am using only log4j.properties configuration file and not the log4j.xml

Thanks in advance

K.Anutosh
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SCJP 1.4
SCWCD 1.4
OCA (Paper I)

[Martijn Verburg]

IIRC (and I haven't done this recently), I think you can by using a LevelMatchFilter, see this section of the FAQ for further help.

Let us know how you get on, I'm curious about this myself!

[Vilpesh Mistry]

In log4j appenders represent the channel where you can send the information to be logged.
Write a Java program to pass different appender name to following log4j api call ----
Log logr = null;
logr = Logger.getLogger(--appender name--);
logr.debug("Entering Javaranch");

passing different appender name is like asking Log4j to write in different log files.
your application has to pick up correct appender name and pass it to logger so that information is written in different log files.

thanks
Vilpesh

[Mike Himstead]

But how can I achieve it that I don't have to ask for a specific appender? I just want to say

private static Logger logger = Logger.getLogger(MyClass.class)

without having to worry about the appenders but still having

logger.debug("My debug message")

writing to debug.log and

logger.info("My info message")

writing to info.log?

I tried the following:

### Direct log messages to stdout ###
#log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#log4j.appender.stdout.Target=System.out
#log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
#log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
 
log4j.rootLogger=DEBUG, MyDebugAppender, MyInfoAppender
 
log4j.appender.MyDebugAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.MyDebugAppender.datePattern='.'yyyy-MM-dd
log4j.appender.MyDebugAppender.file=appLogs/webHost_debug.log
log4j.appender.MyDebugAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.MyDebugAppender.layout.ConversionPattern=%d{ISO8601} %-5p [%t] %c: %m%n
log4j.appender.MyDebugAppender.filter=org.apache.log4j.varia.LevelMatchFilter
log4j.appender.MyDebugAppender.filter.LevelToMatch=DEBUG 
 
log4j.appender.MyInfoAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.MyInfoAppender.datePattern='.'yyyy-MM-dd
log4j.appender.MyInfoAppender.file=appLogs/webHost_info.log
log4j.appender.MyInfoAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.MyInfoAppender.layout.ConversionPattern=%d{ISO8601} %-5p [%t] %c: %m%n
log4j.appender.MyInfoAppender.filter=org.apache.log4j.varia.LevelMatchFilter
log4j.appender.MyInfoAppender.filter.LevelToMatch=INFO 
 
log4j.logger.org.hibernate=ERROR
 
# Disable superflous PARSER errors.
log4j.logger.org.hibernate.PARSER=none
 
### log just the SQL
log4j.logger.org.hibernate.SQL=none
 
### log JDBC bind parameters ###
log4j.logger.org.hibernate.type=info
 
### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug
 
### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2hbmxml=debug
 
### log cache activity ###
#log4j.logger.org.hibernate.cache=debug
 
### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug
 
### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

But info and debug messages are still in both files. Log4J version is 1.2.15. What am I missing here?
[ November 23, 2008: Message edited by: Mike Himstead ]