log4j

#log4j.properties for console appender and file appender.

#SimpleLayout

#PatternLayout and ConversionPatterns

#Levels for specific package.

#Sample log4j.properties file.

log4j.rootLogger=debug, fileAppender

log4j.appender.fileAppender = org.apache.log4j.FileAppender

#log4j.appender.fileAppender.layout=org.apache.log4j.SimpleLayout

log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout

log4j.appender.fileAppender.layout.ConversionPattern=%p;;Date: %d{yyyy-MM-dd HH:mm:ss zz};;Class:%c;;Method: %M;;message: %m%n

log4j.appender.fileAppender.file=logs/run.log

Problems....

#1. SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".

Soln: https://stackoverflow.com/questions/7421612/slf4j-failed-to-load-class-org-slf4j-impl-staticloggerbinder

I followed that and added slf4j-simple-1.6.1.jar to my application along with slf4j-api-1.6.1.jar

#2. Log4j initialization is done before property file is read and loaded property is unused.

Soln: use PropertyConfigurator to re-initalize by passing new properties.

import org.apache.log4j.PropertyConfigurator;

PropertyConfigurator.configure(<NEW_PROPERTIES>);

Shameless SEO Terms:

• late initialization of log4j.
• log4j not using properties supplied in property file.
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