Log4J is a very popular and flexible logging system. It is a good option for JBoss.

  <component>

    <type>org.exoplatform.services.log.LogConfigurationInitializer</type>

    <init-params>

      <value-param>

        <name>logger</name>

        <value>org.exoplatform.services.log.impl.BufferedLog4JLogger</value>

      </value-param>

      <value-param>

        <name>configurator</name>

        <value>org.exoplatform.services.log.impl.Log4JConfigurator</value>

      </value-param>

      <properties-param>

        <name>properties</name>

        <description>Log4J properties</description>

        <property name="log4j.rootLogger" value="DEBUG, stdout, file"/>

        <property name="log4j.appender.stdout" value="org.apache.log4j.ConsoleAppender"/>

        <property name="log4j.appender.stdout.layout" value="org.apache.log4j.PatternLayout"/>

        <property name="log4j.appender.stdout.layout.ConversionPattern" value="%d {dd.MM.yyyy HH:mm:ss} %c {1}: %m (%F, line %L) %n"/>

        <property name="log4j.appender.file" value="org.apache.log4j.FileAppender"/>

        <property name="log4j.appender.file.File" value="jcr.log"/>

        <property name="log4j.appender.file.layout" value="org.apache.log4j.PatternLayout"/>

        <property name="log4j.appender.file.layout.ConversionPattern" value="%d{dd.MM.yyyy HH:mm:ss} %m (%F, line %L) %n"/>

      </properties-param >

    </init-params>

  </component>