As promised in previous blog, I have collected some information about log levels and its configurations.
There are mainly eight log level's available in log4j.
TRACE is used for finer-grained informational events than the DEBUG.
We can define more than log levels in our applications but one per appender. Following is a simple example of how it look like:
Now if we compile and run the above program and we will get following result in /usr/home/log4j/log.out file.
If someone needs more information do add a comment, I will try to provide that information as well.
Happy reading and keep adding comments. cheers..!
There are mainly eight log level's available in log4j.
We can define more than log levels in our applications but one per appender. Following is a simple example of how it look like:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | import org.apache.log4j.*; public class LogClass { private static org.apache.log4j.Logger log = Logger.getLogger(LogClass.class); public static void main(String[] args) { log.setLevel(Level.WARN); log.trace("Trace Message!"); log.debug("Debug Message!"); log.info("Info Message!"); log.warn("Warn Message!"); log.error("Error Message!"); log.fatal("Fatal Message!"); } } |
# Define the root logger with appender file
log = /usr/home/log4j
log4j.rootLogger = WARN, FILE
# Define the file appender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${log}/log.out
# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n
Now if we compile and run the above program and we will get following result in /usr/home/log4j/log.out file.
Warn Message! Error Message! Fatal Message!
If someone needs more information do add a comment, I will try to provide that information as well.
Happy reading and keep adding comments. cheers..!
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