logback实现每个用户一个独立的日志文件

红太狼 2022-06-07 05:53 268阅读 0赞

本文介绍如何使用logback的`Mapped Diagnostic Context (MDC)` 和`SiftingAppender``实现每个线程一个独立的日志文件。`

`MDC 参考手册http://logback.qos.ch/manual/mdc.html`

# 1、logback.xml配置文件示例 #

<configuration>
    	<property name="LOG_HOME" value="/home/logs/hawkeye/"/>
    	<property name="SERIOUS_PATTERN" value="[%d{yyyyMMdd HH:mm:ss.SSS}][%thread]%5level- %msg%n "/>
    	
    	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    		<encoder>
    			<pattern>${SERIOUS_PATTERN}</pattern>
    		</encoder>
    	</appender>
    	<appender name="Async_Console" class="ch.qos.logback.classic.AsyncAppender">
    		<discardingThreshold>0</discardingThreshold>
    		<queueSize>256</queueSize>
    		<appender-ref ref="STDOUT" />
    	</appender>
    	
    	
    	<appender name="Async_FileLog" class="ch.qos.logback.classic.sift.SiftingAppender">
    		<discriminator>  
                <key>application.name</key>  
                <defaultValue>service</defaultValue>  
            </discriminator>  
            <sift>  
    			<appender name="FileLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
    				<filter class="ch.qos.logback.classic.filter.LevelFilter">
    					<level>INFO</level>
    					<onMatch>ACCEPT</onMatch>
    					<onMismatch>DENY</onMismatch>
    				</filter>
    				<file>${LOG_HOME}/${application.name}/applog/service-info.log</file>
    				<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
    					<fileNamePattern>${LOG_HOME}/${application.name}/applog/%d{yyyyMMdd}/service-info.%d{yyyyMMdd}.%i.log</fileNamePattern>
    					<maxHistory>7</maxHistory>
    					<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
    						<maxFileSize>200MB</maxFileSize>
    					</timeBasedFileNamingAndTriggeringPolicy>
    				</rollingPolicy>
    				<encoder>
    					<pattern>${SERIOUS_PATTERN}</pattern>
    				</encoder>
    			</appender>
    		</sift>
    	</appender>
    	
    	<logger name="com.hualala">
    		<level value="debug" />
    		<appender-ref ref="Async_Console" />
    		<appender-ref ref="Async_FileLog" />
    	</logger>
    </configuration>

# 2.java线程代码示例 #

此处通过简单的MDC put与remove来实现每个线程log文件名独立。

package com.yangyi;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.slf4j.MDC;
    
    /**
     * Created by yangjinfeng02 on 2016/6/4.
     */
    public class Counter implements Runnable {
    
        private Logger logger = LoggerFactory.getLogger(Counter.class);
    
        private String counterName;
    
        public Counter(String counterName) {
            this.counterName = counterName;
        }
    
        public void run() {
            MDC.put("application.name", counterName);
            logger.info("start counter {}", counterName);
            MDC.remove("application.name");
        }
    }

package com.yangyi;
    
    import java.util.concurrent.ExecutorService;
    import java.util.concurrent.Executors;
    
    /**
     * Created by yangjinfeng02 on 2016/6/4.
     */
    public class Application {
    
        public static void main(String[] args) {
            ExecutorService executorService = Executors.newFixedThreadPool(5);
            for (int i = 0; i < 10; ++i) {
                executorService.execute(new Counter(String.valueOf(i)));
            }
            executorService.shutdown();
        }
    }

PS：利用logback的MDC特性，实际项目中，可以实现按请求url、用户、host等粒度进行日志文件的独立分隔。 ，如web项目中，可通过拦截器将session id注入到MDC，实现按session分隔日志，或者简单的将session呈现到log信息中。