事物的七种传播行为

事务传播行为类型

事务传播行为类型

说明

PROPAGATION_REQUIRED

如果当前没有事务,就新建一个事务,如果已经存在一个事务中,加入到这个事务中。这是最常见的选择。

PROPAGATION_SUPPORTS

支持当前事务,如果当前没有事务,就以非事务方式执行。

PROPAGATION_MANDATORY

使用当前的事务,如果当前没有事务,就抛出异常。

PROPAGATION_REQUIRES_NEW

新建事务,如果当前存在事务,把当前事务挂起。

PROPAGATION_NOT_SUPPORTED

以非事务方式执行操作,如果当前存在事务,就把当前事务挂起。

PROPAGATION_NEVER

以非事务方式执行,如果当前存在事务,则抛出异常。

PROPAGATION_NESTED

如果当前存在事务,则在嵌套事务内执行。如果当前没有事务,则执行与PROPAGATION_REQUIRED类 似的操作。

罗列了7种spring的事务传播行为,我们具体来看看它的实现。在这里,我们使用spring annotation注解实现事务。

实现事务的类BusinessServiceImpl

package com.aop;  
  
import org.springframework.aop.support.AopUtils;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.stereotype.Service;  
import org.springframework.transaction.annotation.Isolation;  
import org.springframework.transaction.annotation.Propagation;  
import org.springframework.transaction.annotation.Transactional;  
  
import com.entity.Student;  
  
@Service("businessSerivce")  
public class BusinessServiceImpl implements IBaseService {  
  
    @Autowired  
    IStudentDao studentDao;  
  
    @Autowired  
    IBaseServiceB baseServiceb;  
  
    @Transactional(propagation = Propagation.REQUIRED, isolation = Isolation.DEFAULT, rollbackFor = Exception.class)  
    public String doA() throws Exception {  
        Student st = new Student();  
        st.setId(1);  
        st.setSex("girl");  
        st.setUsername("zx");  
        studentDao.insertStudent(st);  
  
        System.out.println(baseServiceb);  
        System.out.println("是否是代理调用,AopUtils.isAopProxy(baseServiceb) : " + AopUtils.isAopProxy(baseServiceb));  
        System.out  
                .println("是否是cglib类代理调用,AopUtils.isCglibProxy(baseServiceb) : " + AopUtils.isCglibProxy(baseServiceb));  
        System.out.println("是否是jdk动态接口代理调用,AopUtils.isJdkDynamicProxy(baseServiceb) : "  
                + AopUtils.isJdkDynamicProxy(baseServiceb));  
          
        //使用代理调用方法doB()  
        baseServiceb.doB();  
        int i = 1 / 0;// 抛出异常,doB()的事务事务回滚  
        return "success";  
    }  
  
    // @Transactional(propagation = Propagation.REQUIRES_NEW, isolation =  
    // Isolation.DEFAULT, rollbackFor = Exception.class)  
    // public String doB() throws Exception {  
    // Student st = new Student();  
    // st.setId(2);  
    // st.setSex("girl");  
    // st.setUsername("zx2");  
    // studentDao.insertStudent(st);  
    //  
    // return "success";  
    // }  
  
}  


实现事务的类BusinessServiceImpl

package com.aop;  
  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.stereotype.Service;  
import org.springframework.transaction.annotation.Isolation;  
import org.springframework.transaction.annotation.Propagation;  
import org.springframework.transaction.annotation.Transactional;  
  
import com.entity.Student;  
  
@Service("businessSerivceB")  
public class BusinessServiceImplB implements IBaseServiceB {  
    
    @Autowired  
    IStudentDao studentDao;  
      
    @Transactional(propagation = Propagation.REQUIRES_NEW,isolation=Isolation.DEFAULT,rollbackFor=Exception.class)    
    public String doB() throws Exception {  
        Student st = new Student();  
        st.setId(2);  
        st.setSex("girl");  
        st.setUsername("zx2");  
        studentDao.insertStudent(st);  
        return "success";  
    }  
       
}

  


测试类:

package com.aop;  
  
import org.springframework.beans.factory.BeanFactory;  
import org.springframework.context.support.ClassPathXmlApplicationContext;  
  
import com.thread.service.IBaseFacadeService;  
  
  
//@RunWith(SpringJUnit4ClassRunner.class)  
//@ContextConfiguration(locations = { "classpath:/spring-ibatis.xml", "classpath:/spring-jdbctemplate.xml" })  
public class TestStudentDao {  
  
    public static void main(String[] args) {  
          try {  
          BeanFactory factory = new ClassPathXmlApplicationContext("spring-jdbctemplate.xml");  
          IBaseService service = (IBaseService) factory.getBean("businessSerivce");  
          
              service.doA();  
        } catch (Exception e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
    }  
}  

测试结果:

om.aop.BusinessServiceImplB@14b75fd9
是否是代理调用,AopUtils.isAopProxy(baseServiceb) : true
是否是cglib类代理调用,AopUtils.isCglibProxy(baseServiceb) : true
是否是jdk动态接口代理调用,AopUtils.isJdkDynamicProxy(baseServiceb) : false

原文地址:https://www.cnblogs.com/baixingqiang/p/6023944.html