@Transactional 注解在多线程环境下不生效问题

最新推荐文章于 2025-07-06 17:30:17 发布

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最新推荐文章于 2025-07-06 17:30:17 发布

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本文链接：https://blog.youkuaiyun.com/chentiefeng/article/details/83013629

本文探讨了在多线程环境中使用Spring的@Transactional注解时遇到的问题，通过具体代码示例展示事务在异步调用中为何未能生效，并分析了TransactionAspectSupport.currentTransactionStatus().flush()方法的作用。

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@Transactional 注解在多线程环境下不生效问题

直接上代码

package com.linzi.risk.indicator.service.impl;

import com.linzi.risk.common.utils.threadpool.ThreadPoolManager;
import com.linzi.risk.indicator.dao.AsyncCommandDao;
import com.linzi.risk.indicator.entity.AsyncCommandEntity;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.interceptor.TransactionAspectSupport;

import javax.annotation.Resource;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Date;

/**
 * @author chentiefeng
 * @date 2018/10/11 14:47
 */
@Component
public class TestTrans {

    @Resource
    private AsyncCommandDao asyncCommandDao;

    @Transactional
    public void test() {
        AsyncCommandEntity command = new AsyncCommandEntity();
        command.setType("test");
        command.setBsnNo("1");
        command.setBsnType("1");
        command.setContent("");
        try {
            command.setAddIp(InetAddress.getLocalHost().getHostName());
            command.setUpdateIp(InetAddress.getLocalHost().getHostName());
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        command.setAddTime(new Date());
        command.setUpdateTime(new Date());
        command.setState("INIT");
        asyncCommandDao.insert(command);
        TransactionAspectSupport.currentTransactionStatus().flush();
        ThreadPoolManager.getInstance().execute(new Runnable() {
            @Override
            public void run() {
                AsyncCommandEntity entity = asyncCommandDao.selectById(command.getId());
                System.out.println("Transactional 事务下异步线程查询：" + entity);
                if (entity.getId() != null) {
                    asyncCommandDao.delete(entity.getId());
                }
            }
        });
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

因为插入后睡眠了500毫秒，所以运行结果就是报空指针异常。
不了解的情况下以为TransactionAspectSupport.currentTransactionStatus().flush();方法能手动commit事务，原来不行