一、供参考的完整日志配置
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<?xml version= "1.0" encoding= "utf-8" ?> <!-- 配置loggerconfig,即appenders的日志级别为warn --> <configuration status= "warn" > <!-- 定义下面的引用名 --> <properties> <property name= "basepath" >${sys:vmparam}</property> <property name= "filepath" >${basepath}/app.log</property> </properties> <!-- appenders支持配置多个appender,支持向不同的目标输送日志,本例为配置向控制台输出 --> <appenders> <console name= "console" target= "system_out" > <patternlayout pattern= "%d{hh:mm:ss.sss} [%t] %-5level %logger{36} - %msg%n" /> </console> <!-- 将日志输出到指定位置的文件中 --> <rollingfile name= "rollingfile" filename= "${filepath}" filepattern= "logs/$${date:yyyy-mm}/app-%d{yyyy-mm-dd-hh}-%i.log.gz" > <policies> <!-- interval单位为filepattern最后一个单位,此处为 6 小时,modulate若为 true , 则日志时间将以 0 点为边界进行偏移计算,由于加了.gz策略,所以此处意思为每隔 6 小时,便会新生成一个 log4j2的压缩文件,当每个文件超过250m时,也会新生成一个log4j2的压缩文件 --> <timebasedtriggeringpolicy interval= "6" modulate= "true" /> <sizebasedtriggeringpolicy size= "250 mb" /> </policies> <!-- 滚动策略,日志文件最多保留 20 个 --> <defaultrolloverstrategy max= "20" /> <!-- 最多备份 30 天以内||日志文件大小达到100gb的日志||文件数量超过十个 此处为策略限制,delete中可以按自己需要用正则表达式编写 --> <defaultrolloverstrategy> <delete basepath= "${filepath}" maxdepth= "1" > <iffilename glob= "logs_*.log" /> <iflastmodified age= "30d" /> <ifaccumulatedfilesize exceeds= "100 gb" /> <ifaccumulatedfilecount exceeds= "10" /> </delete> </defaultrolloverstrategy> </rollingfile> </appenders> <!-- loggers支持配置多个logger,可引用不同的目标appender,也可根据业务需求定制特定要求的appender --> <loggers> <asynclogger name= "asynclogger" level= "trace" > <appender-ref ref= "console" /> <appender-ref ref= "rollingfile" /> </asynclogger> <asyncroot level= "trace" > <appender-ref ref= "console" /> </asyncroot> <root level= "info" > <!-- <appenderref ref= "console" /> --> <appenderref ref= "rollingfile" /> </root> <!-- 第三方日志系统 --> <logger name= "org.springframework" level= "info" additivity= "false" > <appender-ref ref= "console" /> </logger> <logger name= "io.netty" level= "warn" /> <logger name= "org.apache.http" level= "warn" /> <logger name= "org.mongodb.driver" level= "info" /> <logger name= "org.jboss.netty" level= "warn" /> <logger name= "org.springframework.data.redis" level= "info" /> </loggers> </configuration> |
二、动态修改日志级别
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collection<org.apache.logging.log4j.core.logger> current = loggercontext.getcontext( false ).getloggers(); collection<org.apache.logging.log4j.core.logger> notcurrent = loggercontext.getcontext().getloggers(); collection<org.apache.logging.log4j.core.logger> allconfig = current; allconfig.addall(notcurrent); for (org.apache.logging.log4j.core.logger log:allconfig){ log.setlevel(level.debug); } |
三、自定义appender
以上介绍,均依赖于log4j2提供的官方配置,当对日志的业务逻辑复杂时,光靠配置也许满足不了需要,此时我们会想自己能操控打印的日志,做日志的路由,或保存等操作,这个时候就需要有自定义的appender,可以配置的就靠配置完成,不能的就自己写代码干预,而log4j2刚好提供了这样的拓展性。
如下代码即是自定义的appender,通过实现abstractappender接口,配置@plugin注解对应的信息并在eppend方法中写自己的业务逻辑,从而实现了对日志更大自由度的控制,如下展示的log4j配置文件中的配置节点名称要和注解中配置的name属性一致,并在configuration节点配置好自定义appender所在的包路径即可。
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package com.jyk.log4j2.log4j2_test; import java.io.serializable; import java.util.concurrent.locks.lock; import java.util.concurrent.locks.readwritelock; import java.util.concurrent.locks.reentrantreadwritelock; import org.apache.logging.log4j.core.filter; import org.apache.logging.log4j.core.layout; import org.apache.logging.log4j.core.logevent; import org.apache.logging.log4j.core.appender.abstractappender; import org.apache.logging.log4j.core.appender.appenderloggingexception; import org.apache.logging.log4j.core.config.plugins.plugin; import org.apache.logging.log4j.core.config.plugins.pluginattribute; import org.apache.logging.log4j.core.config.plugins.pluginelement; import org.apache.logging.log4j.core.config.plugins.pluginfactory; import org.apache.logging.log4j.core.layout.patternlayout; @plugin (name = "myappender" , category = "core" , elementtype = "appender" , printobject = true ) public class myappender extends abstractappender { /** * @fields serialversionuid */ private static final long serialversionuid = -830237775522429777l; private final readwritelock rwlock = new reentrantreadwritelock(); private final lock readlock = rwlock.readlock(); //需要实现的构造方法,直接使用父类就行 protected myappender( final string name, final filter filter, final layout<? extends serializable> layout, final boolean ignoreexceptions) { super (name, filter, layout, ignoreexceptions); } @override public void append(logevent event) { readlock.lock(); try { final byte [] bytes = getlayout().tobytearray(event); //日志二进制文件,输出到指定位置就行 //拿到每次打印的日志,写自己的业务逻辑 system.out.println( "enter my append..." ); } catch (exception ex) { if (!ignoreexceptions()) { throw new appenderloggingexception(ex); } } finally { readlock.unlock(); } } // 下面这个方法可以接收配置文件中的参数信息 @pluginfactory public static myappender createappender( @pluginattribute ( "name" ) string name, @pluginelement ( "filter" ) final filter filter, @pluginelement ( "layout" ) layout<? extends serializable> layout, @pluginattribute ( "ignoreexceptions" ) boolean ignoreexceptions) { if (name == null ) { logger.error( "no name provided for mycustomappenderimpl" ); return null ; } if (layout == null ) { layout = patternlayout.createdefaultlayout(); } return new myappender(name, filter, layout, ignoreexceptions); } } |
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<configuration status= "warn" packages= "com.jyk.log4j2.log4j2_test" > <myappender name= "textarea" > <patternlayout pattern= "%d{hh:mm:ss.sss} [%t] %-5level %logger{36} - %msg%n" /> </myappender> |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/jiyukai/p/9420833.html