log4j2日志异步打印(实例讲解)

System.setProperty("Log4jContextSelector", "org.apache.logging.log4j.core.async.AsyncLoggerContextSelector");

DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector

<?xml version="1.0" encoding="UTF-8"?>

<!-- No need to set system property "Log4jContextSelector" to any value
when using <asyncLogger> or <asyncRoot>. -->

<Configuration status="WARN">
<Appenders>
<!-- Async Loggers will auto-flush in batches, so switch off immediateFlush. -->
<RandomAccessFile name="RandomAccessFile" fileName="asyncWithLocation.log"
immediateFlush="false" append="false">
<PatternLayout>
<Pattern>%d %p %class{1.} [%t] %location %m %ex%n</Pattern>
</PatternLayout>
</RandomAccessFile>
</Appenders>
<Loggers>
<!-- pattern layout actually uses location, so we need to include it -->
<AsyncLogger name="com.foo.Bar" level="trace" includeLocation="true">
<AppenderRef ref="RandomAccessFile"/>
</AsyncLogger>
<Root level="info" includeLocation="true">
<AppenderRef ref="RandomAccessFile"/>
</Root>
</Loggers>
</Configuration>

<Async name="asyncAppender" includeLocation="true"> 
<AppenderRef ref="RandomAccessFile"/>
</Async>

<Root level="info">
<AppenderRef ref="RandomAccessFile"/>
</Root>