Spring Boot整合Log4j2实践日志

1、Log4j2的性能测试

从图中不难看出，在线程数为 2~16 之间，混合使用同步和异步的logger来打印日志，性能是最好的。

2/ 目标

混合 sync/async
彩色日志
分类输出到不同文件
自动压缩日志文件并归档

Spring Boot整合Log4j2实践日志

3/ 实现

0x01 Maven 依赖 pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.spring</groupId>
<artifactId>springboot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot</name>
<description>Demo Log4j2 for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.16</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>

<dependency>
<groupId>com.lmax</groupId>
<artifactId>disruptor</artifactId>
<version>3.3.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

0x02 配置 Log4j2，在 resources 文件目录下添加文件 log4j2.xml，会被自动配置

<?xml version="1.0" encoding="UTF-8"?>
<!-- Configuration后面的status，这个用于设置log4j2自身内部的信息输出，可以不设置，当设置成trace时，
你会看到log4j2内部各种详细输出。可以设置成OFF(关闭) 或 Error(只输出错误信息)。
30s 刷新此配置
-->
<configuration status="WARN" monitorInterval="30">

<properties>
<Property name="fileName">/Users/admin/Code/log</Property>
<Property name="fileGz">/Users/admin/Code/log/7z</Property>
<Property name="PID">????</Property>
<Property name="LOG_PATTERN">%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{%5p} %clr{${sys:PID}}{magenta} %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n%xwEx</Property>
</properties>
<Appenders>

<Console name="console" target="SYSTEM_OUT">

<ThresholdFilter level="debug" onMatch="ACCEPT" onMismatch="DENY"/>

<PatternLayout pattern="${LOG_PATTERN}"/>
</Console>

<RollingRandomAccessFile name="infoFile" fileName="${fileName}/web-info.log" immediateFlush="false"
filePattern="${fileGz}/$${date:yyyy-MM}/%d{yyyy-MM-dd}-%i.web-info.gz">
<PatternLayout pattern="${LOG_PATTERN}"/>
<Policies>
<SizeBasedTriggeringPolicy size="20 MB"/>
</Policies>
<Filters>

<ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
<ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
</Filters>

<DefaultRolloverStrategy max="50"/>
</RollingRandomAccessFile>

<RollingRandomAccessFile name="errorFile" fileName="${fileName}/web-error.log" immediateFlush="false"
filePattern="${fileGz}/$${date:yyyy-MM}/%d{yyyy-MM-dd}-%i.web-error.gz">
<PatternLayout pattern="${LOG_PATTERN}"/>
<Policies>
<SizeBasedTriggeringPolicy size="50 MB"/>
</Policies>
<Filters>

<ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
</Filters>

<DefaultRolloverStrategy max="50"/>
</RollingRandomAccessFile>
</Appenders>

<Loggers>
<Root level="debug" includeLocation="true">
<AppenderRef ref="console"/>
<AppenderRef ref="infoFile"/>
<AppenderRef ref="errorFile"/>
</Root>
<AsyncRoot level="debug" includeLocation="true">
<AppenderRef ref="console"/>
<AppenderRef ref="infoFile"/>
<AppenderRef ref="errorFile"/>
</AsyncRoot>
</Loggers>
</configuration>