手动实现 SpringBoot 日志链路追踪，无需引入组件，日志定位更方便！
SpringForAll
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前言
cat -n info.log |grep "a415ad50dbf84e99b1b56a31aacd209c"
grep -10 'a415ad50dbf84e99b1b56a31aacd209c' info.log （10是指上下10行）
正文
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</dependency>
<!--lombok配置-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.10</version>
</dependency>
</dependencies>
<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
<!--日志存储路径-->
<property name="log" value="D:/test/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>
server:
port: 8826
logging:
config: classpath:logback-spring.xml
import org.slf4j.MDC;
import org.springframework.lang.Nullable;
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;
/**
* @Author: JCccc
* @Date: 2022-5-30 10:45
* @Description:
*/
public class LogInterceptor implements HandlerInterceptor {
private static final String TRACE_ID = "TRACE_ID";
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
String tid = UUID.randomUUID().toString().replace("-", "");
//可以考虑让客户端传入链路ID，但需保证一定的复杂度唯一性；如果没使用默认UUID自动生成
if (!StringUtils.isEmpty(request.getHeader("TRACE_ID"))){
tid=request.getHeader("TRACE_ID");
}
MDC.put(TRACE_ID, tid);
return true;
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
@Nullable Exception ex) {
MDC.remove(TRACE_ID);
}
}
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;
/**
* @Author: JCccc
* @Date: 2022-5-30 10:47
* @Description:
*/
@Configuration
public class WebConfigurerAdapter implements WebMvcConfigurer {
@Bean
public LogInterceptor logInterceptor() {
return new LogInterceptor();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(logInterceptor());
//可以具体制定哪些需要拦截，哪些不拦截，其实也可以使用自定义注解更灵活完成
// .addPathPatterns("/**")
// .excludePathPatterns("/testxx.html");
}
}
@PostMapping("doTest")
public String doTest(@RequestParam("name") String name) throws InterruptedException {
log.info("入参 name={}",name);
testTrace();
log.info("调用结束 name={}",name);
return "Hello,"+name;
}
private void testTrace(){
log.info("这是一行info日志");
log.error("这是一行error日志");
testTrace2();
}
private void testTrace2(){
log.info("这也是一行info日志");
}
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import java.util.concurrent.Executor;
/**
* @Author: JCccc
* @Date: 2022-5-30 11:07
* @Description:
*/
@Configuration
@EnableAsync
public class ThreadPoolConfig {
/**
* 声明一个线程池
*
* @return 执行器
*/
@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(5);
//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;
}
}
import org.slf4j.MDC;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
/**
* @Author: JCccc
* @Date: 2022-5-30 11:13
* @Description:
*/
public final 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()));
}
}
import org.slf4j.MDC;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Callable;
/**
* @Author: JCccc
* @Date: 2022-5-30 11:14
* @Description:
*/
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());
}
}
/**
* 用于父线程向线程池中提交任务时，将自身MDC中的数据复制给子线程
*
* @param callable
* @param context
* @param <T>
* @return
*/
public static <T> Callable<T> wrap(final Callable<T> callable, final Map<String, String> context) {
return () -> {
if (context == null) {
MDC.clear();
} else {
MDC.setContextMap(context);
}
setTraceIdIfAbsent();
try {
return callable.call();
} finally {
MDC.clear();
}
};
}
/**
* 用于父线程向线程池中提交任务时，将自身MDC中的数据复制给子线程
*
* @param runnable
* @param context
* @return
*/
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();
}
};
}
}
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