Complex Example

log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="FATAL">
	<Properties>
		<Property name="filename">/logs/error.log</Property>
		<Property name="console-pattern">%m%n</Property>
		<Property name="file-pattern">%d %p %t %c - %m%n</Property>
		<Property name="smtp-ip">127.0.0.1</Property>
		<Property name="smtp-user">test</Property>
		<Property name="smtp-pass">test</Property>
		<Property name="smtp-to">test@test.com</Property>
		<Property name="smtp-cc">cc-test@test.com</Property>
		<Property name="smtp-from">from-test@test.com</Property>
		<Property name="smtp-subject">Errors</Property>
	</Properties>

	<Appenders>
		<Console name="console-out" target="SYSTEM_OUT">
			<PatternLayout pattern="${console-pattern}"/>
		</Console>
		
		<Console name="console-err" target="SYSTEM_ERR" ignoreExceptions="false">
			<PatternLayout pattern="${console-pattern}"/>
		</Console>

		<File name="file-log" fileName="${filename}" immediateFlush="false" append="true">
			<PatternLayout pattern="${file-pattern}">
			</PatternLayout>
		</File>
		
		<SMTP name="email-log" subject="${smtp-subject}" to="${smtp-to}" from="${smtp-from}" smtpHost="${smtp-ip}" smtpUsername="${smtp-user}" smtpPassword="${smtp-pass}">
		</SMTP>
		
		<Failover name="failover" primary="email-log">
			<Failovers>
				<AppenderRef ref="console-err"/>
			</Failovers>
		</Failover>
		
		<Async name="async-file-log">
			<AppenderRef ref="file-log"/>
		</Async>
		
		<Async name="async-email-log" errorRef="file-log">
			<AppenderRef ref="failover"/>
		</Async>
	</Appenders>
  
	<Loggers>
		<Logger name="org.gs4tr.connector.polo" level="DEBUG" additivity="false">
			<appender-ref ref="async-file-log" level="error"/>
			<appender-ref ref="async-email-log" level="fatal"/>
			<appender-ref ref="console-out" level="info"/>
			<appender-ref ref="console-out" level="warn"/>
		</Logger>
		
		<Root level="info">
			<AppenderRef ref="async-file-log"/>
		</Root>
	</Loggers>
</Configuration>