Log4j multiple levels in multiple appenders

log4j

I have two appenders: console, and file
I have three packages uk.co.bar, uk.co.bar.foo, uk.co.pip

I need all messages (debug and higher) from uk.co.* to be fed into the file.

I want info messages from uk.co.bar.foo to fed to the console
I want all messages from uk.co.bar.pip to fed to the console

If I use a logger it restricts messages for both appenders. 🙁
If I use filters in the console appender I loose control of the package-level i want.

Anyone have a solution?

Best Answer

see this answer. As far as I understand this addresses your problem

Creating multiple log files of different content with log4j

Related Solutions

Java – Creating multiple log files of different content with log4j

This should get you started:

log4j.rootLogger=QuietAppender, LoudAppender, TRACE
# setup A1
log4j.appender.QuietAppender=org.apache.log4j.RollingFileAppender
log4j.appender.QuietAppender.Threshold=INFO
log4j.appender.QuietAppender.File=quiet.log
...


# setup A2
log4j.appender.LoudAppender=org.apache.log4j.RollingFileAppender
log4j.appender.LoudAppender.Threshold=DEBUG
log4j.appender.LoudAppender.File=loud.log
...

log4j.logger.com.yourpackage.yourclazz=TRACE

Java – Log4j – Have multiple appenders write to the same file with one that always logs

I don't think log4j really supports two appenders writing to the same file because of synchronization issues. Your best bet would be, if possible, to make a switch to slf4j using Logback as your backend logging system since Logback is log4j's successor and also supports multiple appenders writing to one file. Check out FileAppender and it's prudent mode.

Update: from your description, it seems you should also check out markers. You only need one logger instance, and you can get more fine grained control using markers, because with them you basically say "this log statement has a special purpose, and has to be logged using an appropriate appender". You can also check log appender additivity, which is usually used when you use two or more appenders for one log statement.

Best Answer

Related Solutions

Java – Creating multiple log files of different content with log4j

Java – Log4j – Have multiple appenders write to the same file with one that always logs

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