异步线程traceId如何实现传递

import org.slf4j.MDC;
import org.springframework.util.CollectionUtils;

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

/**
 * @desc: 定义MDC工具类，支持Runnable和Callable两种，目的就是为了把父线程的traceId设置给子线程
 */
public class MdcUtil {

    public static <T> Callable<T> wrap(final Callable<T> callable, final Map<String, String> context) {
        return () -> {
            if (CollectionUtils.isEmpty(context)) {
                MDC.clear();
            } else {
                MDC.setContextMap(context);
            }
            try {
                return callable.call();
            } finally {
                // 清除子线程的，避免内存溢出，就和ThreadLocal.remove()一个原因
                MDC.clear();
            }
        };
    }

    public static Runnable wrap(final Runnable runnable, final Map<String, String> context) {
        return () -> {
            if (CollectionUtils.isEmpty(context)) {
                MDC.clear();
            } else {
                MDC.setContextMap(context);
            }
            try {
                runnable.run();
            } finally {
                MDC.clear();
            }
        };
    }
}

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

/**
 * @desc: 把当前的traceId透传到子线程特意加的实现。
 *   重点就是 MDC.getCopyOfContextMap()，此方法获取当前线程（父线程）的traceId
 */
public class ThreadPoolMdcExecutor extends ThreadPoolTaskExecutor {
    @Override
    public void execute(Runnable task) {
        super.execute(MdcUtil.wrap(task, MDC.getCopyOfContextMap()));
    }

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

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

    @Bean(name = "callBackExecutorConfig")
    public Executor callBackExecutorConfig() {
        ThreadPoolTaskExecutor executor = new ThreadPoolMdcExecutor();
        // 配置核心线程数
        executor.setCorePoolSize(10);
        // 配置最大线程数
        executor.setMaxPoolSize(20);
        // 配置队列大小
        executor.setQueueCapacity(200);
        // 配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("async-Thread-");
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // abort：在调用executor执行的方法中抛出异常 RejectedExecutionException
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
        // 执行初始化
        executor.initialize();
        return executor;
    }

public class ContextTransferTaskDecorator implements TaskDecorator {
    @Override
    public Runnable decorate(Runnable runnable) {
        Map<String, String> context = MDC.getCopyOfContextMap();
        RequestAttributes requestAttributes = RequestContextHolder.currentRequestAttributes();
        return () -> {
            try {
                MDC.setContextMap(context);
                RequestContextHolder.setRequestAttributes(requestAttributes);
                runnable.run();
            } finally {
                MDC.clear();
                RequestContextHolder.resetRequestAttributes();
            }
        };
    }
}

    @Bean(name = "callBackExecutorConfig")
    public Executor callBackExecutorConfig() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor ();
        // 配置核心线程数
        executor.setCorePoolSize(10);
        // 配置最大线程数
        executor.setMaxPoolSize(20);
        // 配置队列大小
        executor.setQueueCapacity(200);
        // 配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("async-Thread-");
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // abort：在调用executor执行的方法中抛出异常 RejectedExecutionException
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
        //线程池增强
        threadPoolTaskExecutor.setTaskDecorator(new ContextTransferTaskDecorator());
        // 执行初始化
        executor.initialize();
        return executor;
    }

public class BasicMDCAdapter implements MDCAdapter {
    private InheritableThreadLocal<Map<String, String>> inheritableThreadLocal = 
        new InheritableThreadLocal<Map<String, String>>() {
        protected Map<String, String> childValue(Map<String, String> parentValue) {
            return parentValue == null ? null : new HashMap(parentValue);
        }
    };
    
    //省略若干
    ......
}