一个项目中既需要异步任务, 也需要调度任务, 想把这两个异步线程池分来就需要配置两个线程池。
调度任务添加 @Scheduled 注解, 需要异步执行的方法添加 @Async 注解

中间遇到点小问题, 异步任务线程池总是不生效, 而是使用的调度任务线程池, 经过查文档不断尝试解决了.
公司利用 slf4j 的 MDC 做链路跟踪, 所以还需要添加前置操作, 使用 TaskDecorator 实现。

再次分享给大家以作备忘.

代码如下：

AsyncConfig.java

package com.ecej.esmart.autodispatch.config;


import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.MDC;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskDecorator;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.Map;
import java.util.concurrent.Executor;

@Slf4j
@EnableAsync
@Configuration
public class AsyncConfig implements AsyncConfigurer {

    @Bean
    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(10);
        executor.setMaxPoolSize(10);
        executor.setQueueCapacity(100);
        executor.setThreadNamePrefix("async-pool-");
        executor.setTaskDecorator(new MdcTaskDecorator());
        executor.setWaitForTasksToCompleteOnShutdown(true);
        executor.initialize();
        return executor;
    }

    class MdcTaskDecorator implements TaskDecorator {
        @Override
        public Runnable decorate(Runnable runnable) {
            Map<String, String> contextMap = MDC.getCopyOfContextMap();
            try {
                if (contextMap != null) {
                    MDC.setContextMap(contextMap);
                }
                runnable.run();
            } finally {
                /** 清理后会导致父线程的上下文清空,进入时会复制父线程的内容进行覆盖,可不清理 */
                //MDC.clear();
            }
            return runnable;
        }
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return (throwable, method, params) -> {
            log.error("异步任务异常：方法：{} 参数：{}", method.getName(), JSON.toJSONString(params));
            log.error(throwable.getMessage(), throwable);
        };
    }
}

SchedulingConfig.java

package com.ecej.esmart.autodispatch.config;


import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;

@Slf4j
@Configuration
@EnableScheduling
public class SchedulingConfig implements SchedulingConfigurer {

    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        scheduledTaskRegistrar.setTaskScheduler(taskScheduler());
    }

    @Bean(destroyMethod = "shutdown")
    public ThreadPoolTaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
        scheduler.setPoolSize(5);
        scheduler.setThreadNamePrefix("dispatch-");
        scheduler.setAwaitTerminationSeconds(600);
        scheduler.setErrorHandler(throwable -> log.error("调度任务发生异常", throwable));
        scheduler.setWaitForTasksToCompleteOnShutdown(true);
        return scheduler;
    }

}