原文链接 译者：小村长
RocketMQ logappender提供log4j appender，log4j2 appender和logback appender供业务使用，下面是配置示例.
log4j
当使用log4j属性配置文件时，config如下.
log4j.appender.mq=org.apache.rocketmq.logappender.log4j.RocketmqLog4jAppender
log4j.appender.mq.Tag=yourTag
log4j.appender.mq.Topic=yourLogTopic
log4j.appender.mq.ProducerGroup=yourLogGroup
log4j.appender.mq.NameServerAddress=yourRocketmqNameserverAddress
log4j.appender.mq.layout=org.apache.log4j.PatternLayout
log4j.appender.mq.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-4r [%t] (%F:%L) %-5p - %m%n当使用log4j xml配置文件时，将其配置为此，并添加一个异步appender:
<appender name="mqAppender1" class="org.apache.rocketmq.logappender.log4j.RocketmqLog4jAppender">
<param name="Tag" value="yourTag" />
<param name="Topic" value="yourLogTopic" />
<param name="ProducerGroup" value="yourLogGroup" />
<param name="NameServerAddress" value="yourRocketmqNameserverAddress"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss}-%p %t %c - %m%n" />
</layout>
</appender>
<appender name="mqAsyncAppender1" class="org.apache.log4j.AsyncAppender">
<param name="BufferSize" value="1024" />
<param name="Blocking" value="false" />
<appender-ref ref="mqAppender1"/>
</appender>log4j2
当使用log4j2时，config为这个。如果你想要noneblock，只需要为ref配置一个asyncAppender.
<RocketMQ name="rocketmqAppender" producerGroup="yourLogGroup" nameServerAddress="yourRocketmqNameserverAddress" topic="yourLogTopic" tag="yourTag"> <PatternLayout pattern="%d [%p] hahahah %c %m%n"/> </RocketMQ>
logback
在使用logback时，还需要一个asyncAppender.
<appender name="mqAppender1" class="org.apache.rocketmq.logappender.logback.RocketmqLogbackAppender"> <tag>yourTag</tag> <topic>yourLogTopic</topic> <producerGroup>yourLogGroup</producerGroup> <nameServerAddress>yourRocketmqNameserverAddress</nameServerAddress> <layout> <pattern>%date %p %t - %m%n</pattern> </layout> </appender> <appender name="mqAsyncAppender1" class="ch.qos.logback.classic.AsyncAppender"> <queueSize>1024</queueSize> <discardingThreshold>80</discardingThreshold> <maxFlushTime>2000</maxFlushTime> <neverBlock>true</neverBlock> <appender-ref ref="mqAppender1"/> </appender>
