Spring Tip: Log4j configuration

August 26, 2008 at 12:30 pm · Filed under Log4j, Spring

Place log4j.properties in WEB-INF directory of the web application,

log4j.rootLogger=INFO, stdout, fileAppender

# Used only for development.
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ISO8601} [%t] %-5p (%F:%L) – %m%n
log4j.logger.net.sf.ehcache=TRACE

# File appender used in production.
log4j.appender.fileAppender=org.apache.log4j.RollingFileAppender
log4j.appender.fileAppender.File=${app.logdir}/app.log

log4j.appender.fileAppender.MaxFileSize=1MB
log4j.appender.fileAppender.MaxBackupIndex=5

log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.fileAppender.layout.ConversionPattern=%d{ISO8601} %t %p %c – %m%n

In web.xml add

   	
<context-param>
	<param-name>log4jConfigLocation</param-name>
	<param-value>/WEB-INF/log4j.properties</param-value>
</context-param>

<context-param>
	<param-name>log4jRefreshInterval</param-name>
	<param-value>1000</param-value>
</context-param>
	
<listener>
	<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

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3 Comments »

KarlP said

September 22, 2008 @ 11:30 pm
And how do you make sure that only the production appender is used when you’re running in production, and the stdout appender is used only on development?

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unnisworld said

October 17, 2008 @ 3:05 pm
One way is to keep two separate environment specific log4j properties files and pick the right one during build process. Check out this blog post – http://sujitpal.blogspot.com/2006/10/maven2-multi-environment-filter-setup.html

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daringtakers said

December 15, 2008 @ 3:08 pm
I dont know why, when log4j used in stand alone application, it don’t find log4j.properties

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