升级log4j2.x异步日志

摘要

Log4j 2 包含了基于LMAX 分离库的下一代的异步日志系统，在多线程环境下，异步日志系统比 Log4j 1.x 和Logback提高了10倍性能提升（吞吐量和延迟率 ）

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正文

升级jar包

1.升级log4j2.x的jar包

log4j-api-2.5.jarlog4j-core-2.5.jar

2.加入log4j异步日志使用的jar包

disruptor-3.3.4.jar

3.加入log4j1.x的适配jar包

log4j-1.2-api-2.5.jar

log4j2.x获取logger的方式已经改变，如果想要兼容以前的方式，需要这个jar包的辅助，建议引用第三方的jar包最好自己封装一层，要不以后jar包升级，会带来无尽的烦恼。改动前:import org.slf4j.Logger;      import org.slf4j.LoggerFactory;     private static final Logger logger = LoggerFactory.getLogger(XX.class);改动后:iimport org.apache.logging.log4j.LogManager;      import org.apache.logging.log4j.Logger;     private static final Logger logger = LogManager.getLogger(XX.class);

4.pom配置

           <log4j-api.version>2.5</log4j-api.version>           <dependency>              <groupId>org.apache.logging.log4j</groupId>              <artifactId>log4j-1.2-api</artifactId>              <version>${log4j-api.version}</version>            </dependency>           <dependency>                <groupId>org.apache.logging.log4j</groupId>                <artifactId>log4j-api</artifactId>                <version>${log4j-api.version}</version>            </dependency>            <dependency>                <groupId>org.apache.logging.log4j</groupId>                <artifactId>log4j-core</artifactId>                <version>${log4j-api.version}</version>            </dependency>          <dependency>              <groupId>com.lmax</groupId>              <artifactId>disruptor</artifactId>              <version>3.3.4</version>            </dependency>

升级配置文件

Log4j.xml升级为log4j2.xml

<?xml version="1.0" encoding="UTF-8"?><!-- status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。 --><configuration status="OFF">    <appenders>        <!--这个输出控制台的配置-->        <Console name="CONSOLE" target="SYSTEM_OUT">            <PatternLayout pattern="%d [%7r] %6p - %30.30c - %m \n" />            <!-- 设置级别 -->            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>        </Console>        <RollingFile name="FILE-ALL" fileName="${file_path}/${file_name}.log"              filePattern="${file_path}/${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz">                <PatternLayout pattern="%d [%7r] %6p - %30.30c - %m \n"/>                <SizeBasedTriggeringPolicy size="1024 MB" />            </RollingFile>    </appenders>    <loggers>        <AsyncLogger name="com.xxx" level="debug" additivity="false">              <appender-ref ref="FILE-SQL" />        </AsyncLogger>        <AsyncLogger name="org.mybatis" level="debug" additivity="false">              <appender-ref ref="FILE-SQL" />        </AsyncLogger>        <AsyncLogger name="org.apache.ibatis" level="debug" additivity="false">              <appender-ref ref="FILE-SQL" />        </AsyncLogger>        <AsyncLogger name="java.sql" level="debug" additivity="false">              <appender-ref ref="FILE-SQL" />        </AsyncLogger>        <AsyncRoot level="info">            <appender-ref ref="CONSOLE" />            <appender-ref ref="FILE-ALL" />        </AsyncRoot>     </loggers></configuration>

如果要加上位置信息比如哪个类，第几行，需要在AsyncLogger 加入

includeLocation="true"