RE: Help understanding Log4j basics
I've previously searched the manual and I understand the hierarchy of:
DEBUG INFO WARN ERROR FATAL
However, I'm interested in in learning if there is a way to print ONLY
one level rather than the target level and all levels above it. Unless
I've missed it, the manual does not explain if this is possible (or
how to do it).
In order to print a particular level only you can use LevelFilters which you
can configure in xml configuration. E.g.
appender name=CONSOLE.OUT class=org.apache.log4j.ConsoleAppender
param name=target value=System.out/
layout class=org.apache.log4j.PatternLayout
param name=ConversionPattern value=%d{HH:mm:ss.SSS} (%6r) %-5p
[%-7t] %F:%L %x - %m%n/
/layout
filter class=org.apache.log4j.varia.LevelRangeFilter
param name=LevelMin value=trace/
param name=LevelMax value=info/
param name=AcceptOnMatch value=false/
/filter
/appender
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Re: Help understanding Log4j basics
1. How does one start log4j in a webapp? Is having the log4j.properties or log4j.xml file in the classpath enough? Usually yes. You should have log4j itself in the classpath, of course. 2. How does one stop log4j in a webapp? Configure it via log4j config, then restart webapp (this reloads configuration) 3. Is there a way to specify which level of logging, i.e. debug, info, error, is printed? Yes, via the log4j configuration file. http://logging.apache.org/log4j/1.2/manual.html (search for configuration) Cheers, Christian Thanks. -Ari - To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org -- http://www.grobmeier.de - To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
Re: Help understanding Log4j basics
2. How does one stop log4j in a webapp? Configure it via log4j config, then restart webapp (this reloads configuration) After reviewing the manual, as I understand it the way to turn off logging is by not assigning a log level or assigning a high (error or fatal) log level. But doesn't that leave open the possibility of having log messages, albeit of a higher level i.e. error or fatal? 3. Is there a way to specify which level of logging, i.e. debug, info, error, is printed? Yes, via the log4j configuration file. http://logging.apache.org/log4j/1.2/manual.html (search for configuration) I've previously searched the manual and I understand the hierarchy of: DEBUG INFO WARN ERROR FATAL However, I'm interested in in learning if there is a way to print ONLY one level rather than the target level and all levels above it. Unless I've missed it, the manual does not explain if this is possible (or how to do it). Best, Ari - To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
