Listing 1

<cfscript>
// configure the logger w/ a properties file
configurator = CreateObject("java", "org.apache.log4j.PropertyConfigurator");
configurator.configure("C:mysitesample_config.properties");

// get a logger instance named "com.foo"
logFactory = CreateObject("java", "org.apache.log4j.Category");
logger = logFactory.getInstance("com.foo");
logger.info("informational message using properties config file");
</cfscript>

Listing 2

<cfscript>
// configure the logger w/ an xml file
configurator = CreateObject("java", "org.apache.log4j.xml.DOMConfigurator");
configurator.configure("C:mysitesample_config.xml");

// get a logger instance
categoryObject = CreateObject("java", "org.apache.log4j.Category");
logger = categoryObject.getInstance("test");

// send the message
logger.info("informational message using xml config file");
</cfscript>

Listing 3

# Set root category priority to INFO and its only appender to STDOUT.
log4j.rootCategory=INFO, STDOUT

# set com.foo category priority to INFO and its only appender to A1
log4j.category.com.foo=INFO, A1


# STDOUT is set to the console appender
log4j.appender.STDOUT=org.apache.log4j.ConsoleAppender
log4j.appender.STDOUT.layout=org.apache.log4j.PatternLayout
log4j.appender.STDOUT.layout.ConversionPattern=%d %-5p [%t] %-17c{2} (%13F:%L) %3x - %m%n


# A1 is set to be a FileAppender. 
log4j.appender.A1=org.apache.log4j.FileAppender
log4j.appender.A1.File=C:\mysite\logs\sample.log
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

Listing 4

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

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

<!-- append to a text file -->
<appender name="A1" class="org.apache.log4j.FileAppender">
<param name="File" value="C:\mysite\logs\sample.log" />
<param name="Append" value="true" /> 
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%t %-5p %c{2} - %m%n"/>
</layout> 
</appender>

<!-- append to standard output -->
<appender name="STDOUT" class="org.apache.log4j.FileAppender">
<param name="File" value="System.out"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%F:%L) -
%m%n"/>
</layout>
</appender>

<!-- only log informational messages in the 'com.foo' category --> 
<category name="com.foo">
<priority value="info"/>
<appender-ref ref="A1"/>
</category>

<!-- root is the top level of the logging hierarchy: this will send informational
messages to standard output -->
<root>
<priority value="info"/>
<appender-ref ref="STDOUT"/>
</root>

</log4j:configuration>