云笔记项目-Spring事务学习-传播SUPPORTS

接下来测试事务传播属性SUPPORTS

Service层

Service层将方法的事务传播属性设置为SUPPORTS

LayerT层代码

 package LayerT;

 import javax.annotation.Resource;

 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;

 import Entity.EMP;
 import Service.EMPService1;
 import Service.EMPService2;
 /**
  * 测试Supports
  * @author yangchaolin
  *
  */
 @Component("supportTest")
 public class SupportedTest {
     @Resource(name="service1")
     EMPService1 service1;
     @Resource(name="service2")
     EMPService2 service2;

     /**
      * 外层方法没有事务，但是抛出异常
      * @param emp1
      * @param emp2
      */
     public void testSupportsWithoutTransaction1(EMP emp1,EMP emp2) {
         service1.addEmp1(emp1);
         service2.addEmp2(emp2);
         throw new RuntimeException();
     }
     /**
      * 外层方法没有事务，内层方法抛出异常
      * @param emp1
      * @param emp2
      */
     public void testSupportsWithoutTransaction2(EMP emp1,EMP emp2) {
         service1.addEmp1(emp1);
         service2.addEmp2WithException(emp2);
     }
     /**
      * 外层方法有事务，并抛出异常
      * @param emp1
      * @param emp2
      */
     @Transactional
     public void testSupportsWithTransaction1(EMP emp1,EMP emp2) {
         service1.addEmp1(emp1);
         service2.addEmp2(emp2);
         throw new RuntimeException();
     }
     /**
      * 外层方法有事务，内层方法抛出异常
      * @param emp1
      * @param emp2
      */
     @Transactional
     public void testSupportsWithTransaction2(EMP emp1,EMP emp2) {
         service1.addEmp1(emp1);
         service2.addEmp2WithException(emp2);
     }
     /**
      * 外层方法有事务，内层方法抛出异常被捕获
      * @param emp1
      * @param emp2
      */
     @Transactional
     public void testSupportsWithTransaction3(EMP emp1,EMP emp2) {
         service1.addEmp1(emp1);
         try {
         service2.addEmp2WithException(emp2);
         }catch(Exception e) {
             System.out.println("回滚");
         }
     }
 }

测试代码

 package TestCase;

 import org.junit.Test;

 import Entity.EMP;
 import LayerT.SupportedTest;

 public class supportsTestCase extends baseTest{
     @Test
     public void test1() {
         SupportedTest T1=ac.getBean("supportTest",SupportedTest.class);
         EMP emp1=new EMP("张三",18);
         EMP emp2=new EMP("李四",28);
         T1.testSupportsWithoutTransaction1(emp1, emp2);
       }
     @Test
     public void test2() {
         SupportedTest T1=ac.getBean("supportTest",SupportedTest.class);
         EMP emp1=new EMP("张三",18);
         EMP emp2=new EMP("李四",28);
         T1.testSupportsWithoutTransaction2(emp1, emp2);
       }
     @Test
     public void test3() {
         SupportedTest T1=ac.getBean("supportTest",SupportedTest.class);
         EMP emp1=new EMP("张三",18);
         EMP emp2=new EMP("李四",28);
         T1.testSupportsWithTransaction1(emp1, emp2);
       }
     @Test
     public void test4() {
         SupportedTest T1=ac.getBean("supportTest",SupportedTest.class);
         EMP emp1=new EMP("张三",18);
         EMP emp2=new EMP("李四",28);
         T1.testSupportsWithTransaction2(emp1, emp2);
       }
     @Test
     public void test5() {
         SupportedTest T1=ac.getBean("supportTest",SupportedTest.class);
         EMP emp1=new EMP("张三",18);
         EMP emp2=new EMP("李四",28);
         T1.testSupportsWithTransaction3(emp1, emp2);
       }
 }

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，李四插入

结论：当内层方法事务传播属性设置为SUPPORTS时，在外层方法没有声明事务的情况下，按照非事务方式执行，所以test2方法执行后依然能插入李四。

（2）外层方法有事务

test3	张三未插入，李四未插入
test4	张三未插入，李四未插入
test5	张三未插入，李四未插入

结论：当外层方法支持事务传播时，内层事务加入到外层事务，绑定到一起，只要其中一个发生异常，不管内层方法执行时是否捕获异常，整个事务都需要回滚，这点类似Required。

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