• 云笔记项目-Spring事务学习-传播REQUIRES_NEW


    接下来测试事务传播的REQUIRES_NEW。

    Service层

    Service层代码在这里不展示了,主要将EMPService1Impl类中的方法事务传播属性设置为REQUIRED,EMPService2Impl类中的方法事务传播属性为REQUIRES_NEW,下面代码进行了注释说明。

    LayerT层代码

     1 package LayerT;
     2 
     3 import javax.annotation.Resource;
     4 
     5 import org.springframework.stereotype.Component;
     6 import org.springframework.transaction.annotation.Propagation;
     7 import org.springframework.transaction.annotation.Transactional;
     8 
     9 import Entity.EMP;
    10 import Service.EMPService1;
    11 import Service.EMPService2;
    12 /**
    13  * 测试Requires_New
    14  * @author yangchaolin
    15  *
    16  */
    17 @Component("requiredNewTest")
    18 public class RequiredNewTest {
    19     @Resource(name="service1")
    20     EMPService1 service1;
    21     @Resource(name="service2")
    22     EMPService2 service2;
    23     /**
    24      * 外层方法没有事务,但是抛出异常,内层方法一个事务为Required,一个为Requires_New,以下注释了
    25      * @param emp1
    26      * @param emp2
    27      */
    28     public void testRequiredNewWithoutTransaction1(EMP emp1,EMP emp2) {
    29         service1.addEmp1(emp1);//事务传播为Required
    30         service2.addEmp2(emp2);//事务传播为Requires_New
    31         throw new RuntimeException();
    32     }
    33     /**
    34      * 外层方法没有事务,但是内层方法抛出异常
    35      * @param emp1
    36      * @param emp2
    37      */
    38     public void testRequiredNewWithoutTransaction2(EMP emp1,EMP emp2) {
    39         service1.addEmp1(emp1);//事务传播为Required
    40         service2.addEmp2WithException(emp2);//事务传播为Requires_New
    41     }
    42     /**
    43      * 外层方法有事务,并且抛出异常
    44      * @param emp1
    45      * @param emp2
    46      */
    47     @Transactional(propagation=Propagation.REQUIRED)
    48     public void testRequiredNewWithTransaction1(EMP emp1,EMP emp2) {
    49         service1.addEmp1(emp1);//事务传播为Required
    50         service2.addEmp2(emp2);//事务传播为Requires_New
    51         throw new RuntimeException();
    52     }
    53     /**
    54      * 外层方法有事务,由内层方法抛出异常
    55      * @param emp1
    56      * @param emp2
    57      * @param emp3
    58      */
    59     @Transactional(propagation=Propagation.REQUIRED)
    60     public void testRequiredNewWithTransaction2(EMP emp1,EMP emp2,EMP emp3) {
    61         service1.addEmp1(emp1);//事务传播为Required
    62         service2.addEmp2(emp2);//事务传播为Requires_New
    63         service2.addEmp2WithException(emp3);//事务传播为Requires_New
    64     }
    65     /**
    66      * 外层方法有事务,内层方法抛出的异常被捕获
    67      * @param emp1
    68      * @param emp2
    69      * @param emp3
    70      */
    71     @Transactional(propagation=Propagation.REQUIRED)
    72     public void testRequiredNewWithTransaction3(EMP emp1,EMP emp2,EMP emp3) {
    73         service1.addEmp1(emp1);//事务传播为Required
    74         service2.addEmp2(emp2);//事务传播为Requires_New
    75         try {
    76         service2.addEmp2WithException(emp3);//事务传播为Requires_New
    77         }catch(Exception e) {
    78             System.out.println("回滚");
    79         }
    80     }
    81 }

    测试代码

     1 package TestCase;
     2 
     3 import org.junit.Test;
     4 
     5 import Entity.EMP;
     6 import LayerT.RequiredNewTest;
     7 
     8 public class requireNewTestCase extends baseTest{
     9     @Test
    10     public void test1() {
    11         RequiredNewTest T1=ac.getBean("requiredNewTest",RequiredNewTest.class);
    12         EMP emp1=new EMP("张三",18);
    13         EMP emp2=new EMP("李四",28);
    14         T1.testRequiredNewWithoutTransaction1(emp1, emp2);
    15       }    
    16     @Test
    17     public void test2() {
    18         RequiredNewTest T1=ac.getBean("requiredNewTest",RequiredNewTest.class);
    19         EMP emp1=new EMP("张三",18);
    20         EMP emp2=new EMP("李四",28);
    21         T1.testRequiredNewWithoutTransaction2(emp1, emp2);
    22       }    
    23     @Test
    24     public void test3() {
    25         RequiredNewTest T1=ac.getBean("requiredNewTest",RequiredNewTest.class);
    26         EMP emp1=new EMP("张三",18);
    27         EMP emp2=new EMP("李四",28);
    28         T1.testRequiredNewWithTransaction1(emp1, emp2);
    29       }    
    30     @Test
    31     public void test4() {
    32         RequiredNewTest T1=ac.getBean("requiredNewTest",RequiredNewTest.class);
    33         EMP emp1=new EMP("张三",18);
    34         EMP emp2=new EMP("李四",28);
    35         EMP emp3=new EMP("王五",22);
    36         T1.testRequiredNewWithTransaction2(emp1, emp2, emp3);
    37       }    
    38     @Test
    39     public void test5() {
    40         RequiredNewTest T1=ac.getBean("requiredNewTest",RequiredNewTest.class);
    41         EMP emp1=new EMP("张三",18);
    42         EMP emp2=new EMP("李四",28);
    43         EMP emp3=new EMP("王五",22);
    44         T1.testRequiredNewWithTransaction3(emp1, emp2, emp3);
    45       }    
    46 }

    测试结果

    (1)外层方法没有事务

    test1 张三插入,李四插入
    test2 张三插入,李四未插入

     

    结论:外层方法如果没有事务,内层方法事务相互独立,在事务传播为REQUIRED_NEW的情况下,内层方法如果抛出异常将不会插入数据,数据回滚,但不会影响其他内层方法。

    (2)外层方法有事务

    test3 张三未插入,李四插入
    test4 张三未插入,李四插入,王五未插入
    test5 张三插入,李四插入,王五未插入

    结论:如果外层事务传播属性为默认的REQUIRED,内层方法如果有同样的事务传播属性,将绑定在一起,只要外层方法抛出异常,或者感知内层方法抛出的异常,都会回滚。而内层方法事务传播属性为REQUIRES_NEW时,会单独开辟一个自己的事务,不受外层事务的干扰。

    参考博文:https://segmentfault.com/a/1190000013341344

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  • 原文地址:https://www.cnblogs.com/youngchaolin/p/10629358.html
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