Multiple Appenders Using XML File example

In this example we will see how to create more than one appender using xml configuration file. This example is similar to the one we saw before using the properties file (example). So I will simply compare both.

The following code shows the log4j.properties file we used in the previous example.

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print?

log4j.rootLogger=DEBUG, CA, FA

#Console Appender

log4j.appender.CA=org.apache.log4j.ConsoleAppender

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

log4j.appender.CA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

#File Appender

log4j.appender.FA=org.apache.log4j.FileAppender

log4j.appender.FA.File=sample.log

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

log4j.appender.FA.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

# Set the logger level of File Appender to WARN

log4j.appender.FA.Threshold = WARN

The following code shows the corresponding log4j.xml file.

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print?

<?xml version="0" encoding="UTF-8" ?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

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

<appender name="CA" class="org.apache.log4j.ConsoleAppender">

<layout class="org.apache.log4j.PatternLayout">

<param name="ConversionPattern" value="%-4r [%t] %-5p %c %x - %m%n" />

</layout>

</appender>

<appender name="FA" class="org.apache.log4j.FileAppender">

<param name="File" value="sample.log"/>

<param name="Threshold" value="WARN"/>

<layout class="org.apache.log4j.PatternLayout">

<param name="ConversionPattern" value="%-4r [%t] %-5p %c %x - %m%n" />

</layout>

</appender>

<root>

<level value="DEBUG" />

<appender-ref ref="CA" />

<appender-ref ref="FA" />

</root>

</log4j:configuration>