SpringBoot+MDC实现链路调用日志的方法

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!--日志存储路径-->
    <property name="log" value="D://Xiangmu//TrackMeta//src//main//resources//log" />
    <!-- 控制台输出 -->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--输出格式化-->
            <pattern>[%X{TRACE_ID}]  %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
    </appender>
    <!-- 按天生成日志文件 -->
    <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--日志文件名-->
            <FileNamePattern>${log}/%d{yyyy-MM-dd}.log</FileNamePattern>
            <!--保留天数-->
            <MaxHistory>30</MaxHistory>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>[%X{TRACE_ID}]  %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
        </encoder>
        <!--日志文件最大的大小-->
        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <MaxFileSize>10MB</MaxFileSize>
        </triggeringPolicy>
    </appender>

    <!-- 日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="console" />
        <appender-ref ref="file" />
    </root>
</configuration>

<dependencies>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.7</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>1.2.3</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-access</artifactId>
        <version>1.2.3</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
    </dependency>
</dependencies>

server:
  port: 8826
logging:
  config: classpath:logback-spring.xml
spring:
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher  # 解决SpringBoot 和Swagger2版本冲突

package com.wyh.trackmeta.interceptor;

import org.slf4j.MDC;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.Http.httpservletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.UUID;

//自定义日志拦截器：每一次链路，线程维度，添加最终的链路ID ：Trace_ID
public class LogInterceptor implements HandlerInterceptor {

    private static final String TRACE_ID = "TRACE_ID";

    
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String tid = UUID.randomUUID().toString().replace("-", "");
        //1.这里我们是让客户端传入链路ID，然后进行前置拦截捕获
        if(!StringUtils.isEmpty(request.getHeader("TRACE_ID"))){
            tid=request.getHeader("TRACE_ID");
        }
        //2.利用MDC将请求的上下文信息存储到当前线程的上下文映射中
        MDC.put(TRACE_ID,tid);
        return true;
    }


    
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        MDC.remove(TRACE_ID);
    }
}

package com.wyh.trackmeta.interceptor;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorReGIStry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WebConfigurerAdapter implements WebMvcConfigurer {

    //1.注册日志拦截器
    @Bean
    public LogInterceptor logInterceptor() {
        return new LogInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(logInterceptor());
    }
}

package com.wyh.trackmeta.config;

import org.slf4j.MDC;

import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Callable;
 

public final class ThreadMdcUtil {
    private static final String TRACE_ID = "TRACE_ID";
 
    // 获取唯一性标识
    public static String generateTraceId() {
        return UUID.randomUUID().toString();
    }
 
    public static void setTraceIdIfAbsent() {
        if (MDC.get(TRACE_ID) == null) {
            MDC.put(TRACE_ID, generateTraceId());
        }
    }
 
    
    public static <T> Callable<T> wrap(final Callable<T> callable, final Map<String, String> context) {
        return new Callable<T>() {
            @Override
            public T call() throws Exception {
                if (context == null) {
                    MDC.clear();
                } else {
                    MDC.setContextMap(context);
                }
                setTraceIdIfAbsent();
                try {
                    return callable.call();
                } finally {
                    MDC.clear();
                }
            }
        };
    }
 
    
    public static Runnable wrap(final Runnable runnable, final Map<String, String> context) {
        return () -> {
            if (context == null) {
                MDC.clear();
            } else {
                MDC.setContextMap(context);
            }
            setTraceIdIfAbsent();
            try {
                runnable.run();
            } finally {
                MDC.clear();
            }
        };
    }
}

package com.wyh.trackmeta.config;

import org.slf4j.MDC;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Callable;
import java.util.concurrent.Future;
 

public class MyThreadPoolTaskExecutor  extends ThreadPoolTaskExecutor  {
    public MyThreadPoolTaskExecutor() {
        super();
    }
    
    @Override
    public void execute(Runnable task) {
        super.execute(ThreadMdcUtil.wrap(task, MDC.getCopyOfContextMap()));
    }

 
    @Override
    public <T> Future<T> submit(Callable<T> task) {
        return super.submit(ThreadMdcUtil.wrap(task, MDC.getCopyOfContextMap()));
    }
 
    @Override
    public Future<?> submit(Runnable task) {
        return super.submit(ThreadMdcUtil.wrap(task, MDC.getCopyOfContextMap()));
    }
}

package com.wyh.trackmeta.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;

import java.util.concurrent.Executor;

@Configuration
@EnableAsync
public class ThreadPoolConfig {
    public static void main(String[] args) {
        Thread thread = new Thread();
    }

    
    @Bean("MyExecutor")
    public Executor asyncExecutor() {
        MyThreadPoolTaskExecutor executor = new MyThreadPoolTaskExecutor();
        //核心线程数5：线程池创建时候初始化的线程数
        executor.setCorePoolSize(5);
        //最大线程数5：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        executor.setMaxPoolSize(10);
        //缓冲队列500：用来缓冲执行任务的队列
        executor.setQueueCapacity(500);
        //允许线程的空闲时间60秒：当超过了核心线程出之外的线程在空闲时间到达之后会被销毁
        executor.seTKEepAliveSeconds(60);
        //线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        executor.setThreadNamePrefix("asyncJCccc");
        executor.initialize();
        return executor;
    }
}

package com.wyh.trackmeta.controller;

import com.wyh.trackmeta.service.UserServiceImpl;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@Api(tags = "链路日志测试")
@RestController
@Slf4j
public class TestController {

    @Autowired
    private UserServiceImpl userService;

    @SneakyThrows
    @ApiOperation("日志测试Test接口")
    @RequestMapping("doTest")
    public String doTest(@RequestParam("name")String name){
       log.info("入参 name={}",name);
       testTrace();
       userService.insertUser();
       log.info("调用结束 name={}",name);
       return "Hello,"+name;
    }

    
    private void testTrace(){
        log.info("这是一行info日志");
        log.info("这是一行error日志");
        testTrace2();
    }

    private void testTrace2() {
        log.info("这也是一行日志");
    }

}

package com.wyh.trackmeta.service;

import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

import static java.lang.Thread.sleep;

@Slf4j
@Service
public class UserServiceImpl {
    @SneakyThrows
    @Async("MyExecutor")
    public void insertUser() throws InterruptedException {
        sleep(2000);
        log.info("正在插入数据...");
    }

}