CK's Developer Blog

By default Tomcat uses JDK logging. I used the following  log4j.xml [which should go under WEB-INF\classes folder] to enable log4j for a SEAM based web application [infact  for any  web application] in Tomcat. In Maven please place it under, src\main\resources.

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

 <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">

 <appender name="CONSOLE">

 <param name="Target" value="System.out"/>

 <layout>
 <param name="ConversionPattern" value="%d{HH:mm:ss,SSS} %-5p [%c{1}] %m%n"/>
 </layout>
 </appender>
 <appender name="FILE">

 <param name="File" value="${catalina.base}/logs/yourwebappname.log"/>

 <param name="DatePattern" value="'.'yyyy-MM-dd"/>
 <layout>
 <param name="ConversionPattern" value="%d{HH:mm:ss,SSS} %-5p [%c{1}] %m%n"/>
 </layout>
 </appender>

 <root>
 <priority value="INFO"/>

 <appender-ref ref="FILE"/>
 <appender-ref ref="CONSOLE"/>
 </root>

 </log4j:configuration>

In a Maven based application add the below dependency to include log4j jar.

<dependency>
<groupId>apache-log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>