src/examples/config/async-example.xml

<?xml version="1.0" encoding="UTF-8" ?>
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
  <appender name="A1" class="RollingFileAppender">
    <param name="File"   value="${TEMP}/SomeApplicationName.log" />
    <param name="Append" value="true" />
    <layout class="PatternLayout">
      <param name="ConversionPattern" value="%d %-5p %c{2} - %m%n"/>
    </layout>
  </appender>
  <appender name="SENDMAIL" class="SMTPAppender">
    <param name="from"   value="service_name@example.org" />
    <param name="to" value="some_support_group@example.org" />
    <param name="subject" value="Service error detected" />
    <param name="SMTPHost" value="smtp.example.com"/>
    <layout class="PatternLayout">
		<param name="ConversionPattern" value="%-5p %c{2} - %m%n"/>
    </layout>
    <!-- triggeringPolicy class="SpecialTriggeringEventEvaluator" -->
    <!-- param name="evaluatorClass" value="SpecialTriggeringEventEvaluator" -->
  </appender>
  <appender name="ASYNC" class="AsyncAppender">
    <param name="BufferSize" value="1000"/>
    <param name="Blocking" value="false"/>
    <appender-ref ref="SENDMAIL"/>
  </appender>
  <root>
    <priority value ="INFO" />
    <appender-ref ref="A1" />
    <appender-ref ref="ASYNC" />
  </root>
</log4j:configuration>