架构师不得不知的Spring事务不能回滚的深层次原因

2023-10-13 05:10
文章标签 java spring 不能 原因 事务 不知 架构师 回滚 不得 深层次

本文主要是介绍架构师不得不知的Spring事务不能回滚的深层次原因，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

author: rocklei123
tags:

  • Java
  • Spring
  • Spring Transaction
    categories: Spring
    date: 2018-09-18 17:19:20

1.目标

  • 本文汇总了常见Spring事务无法回滚的问题，并配合实际案例模拟，并给出解决方案。通过本文可以更加详细的了解Spring事务无法回滚的原因。
  • 希望大家手动敲一遍代码，会收获颇丰。

2.测试环境信息

** 核心jar版本 **

spring-web-4.1.7.RELEASE.jar
spring-core-4.1.7.RELEASE.jar
spring-jdbc-4.1.7.RELEASE.jar
mybatis-spring-1.3.1.jar
mybatis-3.4.6.jar
ojdbc6-6.0.jar
junit-4.11.jar

3.try{}catch{非RuntimeException} 导致回滚失败

3.1 测试场景

模拟从中国农业银行（abcBank）张三账户转账给工商银行（icbcBank）李四账户200元。两个账户初始账户金额都为1000：

架构师不得不知的Spring事务不能回滚的深层次原因-1

3.2 测试代码

测试入口

@Test
public void testTransferAccountsFromZsABCBankToLsICBCBankRuntimeException() {System.out.println("test开始转账.........");int success = transferAccountsService.transferAccountRuntimeException("zhangsan", "lisi", 200);System.out.println("test转账业务完成  and success = " + success + ".........");
}

transferAccountsService （service层代码）

@Transactionalpublic int transferAccountRuntimeException(String username1, String username2, double money) {int success = -1;try {System.out.println("transferAccountRuntimeException 开始转账业务------------------------");System.out.println("transferAccountRuntimeException 张三开始取钱------------------------");abcUserMoneyDao.drawMoney(username1, money);System.out.println("transferAccountRuntimeException 李四开始存钱------------------------");int a = 1 / 0;  //模拟出现异常icbcUserMoneyDao.saveMoney(username2, money);System.out.println("transferAccountRuntimeException 转账业完成务------------------------");success = 1;} catch (Exception e) {e.printStackTrace();success = 0;}return success;}

3.3 测试结果

张三取钱成功，李四存钱失败。钱转丢了！！！但是Spring事务并未回滚

架构师不得不知的Spring事务不能回滚的深层次原因-2

test开始转账.........
2018-09-19 10:58:15,998 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:248) org.springframework.beans.factory.support.DefaultListableBeanFactory
DEBUG: Returning cached instance of singleton bean 'txManager'
2018-09-19 10:58:15,999 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:248) org.springframework.beans.factory.support.DefaultListableBeanFactory
DEBUG: Returning cached instance of singleton bean 'transactionManager'
2018-09-19 10:58:16,079 org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:367) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Creating new transaction with name [com.rocklei123.spring.transaction.transferAccount.service.Impl.TransferAccountsServiceImpl.transferAccountRuntimeException]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
2018-09-19 10:58:29,487 org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:206) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Acquired Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] for JDBC transaction
2018-09-19 10:58:29,555 org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:223) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Switching JDBC Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] to manual commit
transferAccountRuntimeException 开始转账业务------------------------
transferAccountRuntimeException 张三开始取钱------------------------
2018-09-19 10:58:29,642 org.mybatis.spring.SqlSessionUtils.getSqlSession(SqlSessionUtils.java:97) org.mybatis.spring.SqlSessionUtils
DEBUG: Creating a new SqlSession
2018-09-19 10:58:29,723 org.mybatis.spring.SqlSessionUtils.registerSessionHolder(SqlSessionUtils.java:128) org.mybatis.spring.SqlSessionUtils
DEBUG: Registering transaction synchronization for SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f1d60b0]
2018-09-19 10:58:30,802 org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:87) org.mybatis.spring.transaction.SpringManagedTransaction
DEBUG: JDBC Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] will be managed by Spring
2018-09-19 10:58:30,855 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ABCUserMoneyDao.drawMoney
DEBUG: ==>  Preparing: UPDATE ABC_USER SET money = money - 200.0 WHERE username = ?
java.lang.ArithmeticException: / by zeroat com.rocklei123.spring.transaction.transferAccount.service.Impl.TransferAccountsServiceImpl.transferAccountRuntimeException(TransferAccountsServiceImpl.java:93)...at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)at com.sun.proxy.$Proxy21.transferAccountRuntimeException(Unknown Source)at tansferAccountTest.SpringTransactionTest.testTransferAccountsFromZsABCBankToLsICBCBankRuntimeException(SpringTransactionTest.java:62)....at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
2018-09-19 10:58:32,027 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ABCUserMoneyDao.drawMoney
DEBUG: ==> Parameters: zhangsan(String)
2018-09-19 10:58:32,039 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ABCUserMoneyDao.drawMoney
DEBUG: <==    Updates: 1
2018-09-19 10:58:32,040 org.mybatis.spring.SqlSessionUtils.closeSqlSession(SqlSessionUtils.java:186) org.mybatis.spring.SqlSessionUtils
DEBUG: Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f1d60b0]
transferAccountRuntimeException 李四开始存钱------------------------
2018-09-19 10:58:32,049 org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization.beforeCommit(SqlSessionUtils.java:284) org.mybatis.spring.SqlSessionUtils
DEBUG: Transaction synchronization committing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f1d60b0]
2018-09-19 10:58:32,050 org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization.beforeCompletion(SqlSessionUtils.java:310) org.mybatis.spring.SqlSessionUtils
DEBUG: Transaction synchronization deregistering SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f1d60b0]
2018-09-19 10:58:32,051 org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization.beforeCompletion(SqlSessionUtils.java:315) org.mybatis.spring.SqlSessionUtils
DEBUG: Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f1d60b0]
2018-09-19 10:58:32,051 org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:755) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Initiating transaction commit
2018-09-19 10:58:32,052 org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:269) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Committing JDBC transaction on Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver]
2018-09-19 10:58:32,059 org.springframework.jdbc.datasource.DataSourceTransactionManager.doCleanupAfterCompletion(DataSourceTransactionManager.java:327) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Releasing JDBC Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] after transaction
2018-09-19 10:58:32,060 org.springframework.jdbc.datasource.DataSourceUtils.doReleaseConnection(DataSourceUtils.java:327) org.springframework.jdbc.datasource.DataSourceUtils
DEBUG: Returning JDBC Connection to DataSource
test转账业务完成  and success = 0.........

3.4 回滚失败原因

Spring的事务管理默认对Error异常和RuntimeException异常以及其子类进行事务回滚，且必须抛出异常，若使用try-catch对其异常捕获则不会进行回滚！（Error异常和RuntimeException异常抛出时不需要方法调用throws或try-catch语句）；

以下是spring-tx-4.1.7.RELEASE.jar包中的部分源码：

package org.springframework.transaction.interceptor;import org.springframework.transaction.TransactionDefinition;public interface TransactionAttribute extends TransactionDefinition {String getQualifier();boolean rollbackOn(Throwable var1);
}package org.springframework.transaction.interceptor;import org.springframework.transaction.support.DefaultTransactionDefinition;public class DefaultTransactionAttribute extends DefaultTransactionDefinition implements TransactionAttribute {private String qualifier;public boolean rollbackOn(Throwable ex) {return ex instanceof RuntimeException || ex instanceof Error;}
}

3.5 回滚失败解决办法

以下三种方式都可以解决try{}catch{非RuntimeException} 造成事务不回滚的问题
（1） throw new RuntimeException();

@Transactionalpublic int transferAccountRuntimeException(String username1, String username2, double money) {int success = -1;try {System.out.println("transferAccountRuntimeException 开始转账业务------------------------");System.out.println("transferAccountRuntimeException 张三开始取钱------------------------");abcUserMoneyDao.drawMoney(username1, money);System.out.println("transferAccountRuntimeException 李四开始存钱------------------------");int a = 1 / 0;icbcUserMoneyDao.saveMoney(username2, money);System.out.println("transferAccountRuntimeException 转账业完成务------------------------");success = 1;} catch (Exception e) {e.printStackTrace();success = 0;throw new RuntimeException();}return success;}

（2）配置 rollbackFor = Exception.class

@Transactional(rollbackFor = Exception.class)public int transferAccountRuntimeException(String username1, String username2, double money) {int success = -1;try {System.out.println("transferAccountRuntimeException 开始转账业务------------------------");System.out.println("transferAccountRuntimeException 张三开始取钱------------------------");abcUserMoneyDao.drawMoney(username1, money);System.out.println("transferAccountRuntimeException 李四开始存钱------------------------");int a = 1 / 0;icbcUserMoneyDao.saveMoney(username2, money);System.out.println("transferAccountRuntimeException 转账业完成务------------------------");success = 1;} catch (Exception e) {e.printStackTrace();success = 0;throw e;}return success;}

（3）手动回滚事务

@Transactionalpublic int transferAccountSetRollbackOnly(String username1, String username2, double money) {int success = -1;try {System.out.println("transferAccountRuntimeException 开始转账业务------------------------");System.out.println("transferAccountRuntimeException 张三开始取钱------------------------");abcUserMoneyDao.drawMoney(username1, money);System.out.println("transferAccountRuntimeException 李四开始存钱------------------------");int a = 1 / 0;icbcUserMoneyDao.saveMoney(username2, money);System.out.println("transferAccountRuntimeException 转账业完成务------------------------");success = 1;} catch (Exception e) {e.printStackTrace();success = 0;TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();}return success;}

4.this调用导致回滚失败

4.1 测试场景

/*** @param username1* @param username2* @param money     业务需求：*                  1 transferAccountRequiresNew是一个加入事务的service层方法。且必须一个方法中同时调用 abcBankDrawMoney (zhangsan) 和  icbcUserMoneyDao.saveMoney(lisi)*                  2 abcBankDrawMoney (zhangsan)  允许失败，也就是说abcBankDrawMoney (zhangsan) 成功与否对icbcUserMoneyDao.saveMoney(lisi) 业务不影响*                  3 abcBankDrawMoney 是一个 @Transactional(propagation = Propagation.REQUIRES_NEW) 的方法 。该方法发生异常回滚*                  4 初始金额 abcBank  zhangsan 1000*                  4 初始金额 icbcBank  lisi  1000*                  <p>*                  预期效果：*                  1 、abcBankDrawMoney (zhangsan)   回滚*                  2 、icbcUserMoneyDao.saveMoney(lisi) 取钱成功*                  3、 预期金额 abcBank  zhangsan 1000*                  4 、预期金额 icbcBank  lisi  1200*                  <p>*                  真实结果:*                  1、真实金额 abcBank  zhangsan 800*                  2、真实金额 icbcBank  lisi  1200*/

4.2 测试代码

@Test
public void testTransferAccountsFromZsABCBankToLsICBCBankRequiresNew() {System.out.println("test开始转账.........");transferAccountsService.transferAccountRequiresNew("zhangsan", "lisi", 200);System.out.println("test转账业务完成.........");
}@Transactionalpublic void transferAccountRequiresNew(String username1, String username2, double money) {try {this.abcBankDrawMoney(username1, money);} catch (Exception e) {e.printStackTrace();}System.out.println("准备开始为李四存钱业务---------------");icbcUserMoneyDao.saveMoney(username2, money);System.out.println("李四存钱成功---------------");System.out.println("转账业务完成---------------");}@Transactional(propagation = Propagation.REQUIRES_NEW)@Overridepublic void abcBankDrawMoney(String username, double money) {System.out.println("准备开始为张三取钱业务---------------");abcUserMoneyDao.drawMoney(username, money);int a = 1 / 0;System.out.println(username + "张三取钱成功-------------");}

4.3 测试结果

我们看到即使abcBankDrawMoney 方法发生了异常，但是并未进行回滚操作，钱还是被取成功了，和我们之前预期的结果不是一样。

以下是执行结果：

架构师不得不知的Spring事务不能回滚的深层次原因-3

执行日志，并未回滚：

test开始转账.........
2018-09-19 14:26:06,230 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:248) org.springframework.beans.factory.support.DefaultListableBeanFactory
DEBUG: Returning cached instance of singleton bean 'txManager'
2018-09-19 14:26:06,231 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:248) org.springframework.beans.factory.support.DefaultListableBeanFactory
DEBUG: Returning cached instance of singleton bean 'transactionManager'
2018-09-19 14:26:06,376 org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:367) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Creating new transaction with name [com.rocklei123.spring.transaction.transferAccount.service.Impl.TransferAccountsServiceImpl.transferAccountRequiresNew]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
2018-09-19 14:26:11,187 org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:206) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Acquired Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] for JDBC transaction
2018-09-19 14:26:11,229 org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:223) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Switching JDBC Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] to manual commit
准备开始为张三取钱业务---------------
2018-09-19 14:26:11,261 org.mybatis.spring.SqlSessionUtils.getSqlSession(SqlSessionUtils.java:97) org.mybatis.spring.SqlSessionUtils
DEBUG: Creating a new SqlSession
2018-09-19 14:26:11,344 org.mybatis.spring.SqlSessionUtils.registerSessionHolder(SqlSessionUtils.java:128) org.mybatis.spring.SqlSessionUtils
DEBUG: Registering transaction synchronization for SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211]
2018-09-19 14:26:11,855 org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:87) org.mybatis.spring.transaction.SpringManagedTransaction
DEBUG: JDBC Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] will be managed by Spring
2018-09-19 14:26:11,875 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ABCUserMoneyDao.drawMoney
DEBUG: ==>  Preparing: UPDATE ABC_USER SET money = money - 200.0 WHERE username = ?
2018-09-19 14:26:12,292 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ABCUserMoneyDao.drawMoney
DEBUG: ==> Parameters: zhangsan(String)
2018-09-19 14:26:12,477 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ABCUserMoneyDao.drawMoney
DEBUG: <==    Updates: 1
2018-09-19 14:26:12,479 org.mybatis.spring.SqlSessionUtils.closeSqlSession(SqlSessionUtils.java:186) org.mybatis.spring.SqlSessionUtilsjava.lang.ArithmeticException: / by zeroat com.rocklei123.spring.transaction.transferAccount.service.Impl.TransferAccountsServiceImpl.ab.... 省略部分堆栈at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
DEBUG: Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211]
准备开始为李四存钱业务---------------
2018-09-19 14:26:12,495 org.mybatis.spring.SqlSessionUtils.sessionHolder(SqlSessionUtils.java:163) org.mybatis.spring.SqlSessionUtils
DEBUG: Fetched SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211] from current transaction
2018-09-19 14:26:12,497 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ICBCUserMoneyDao.saveMoney
DEBUG: ==>  Preparing: UPDATE ICBC_USER SET money = money + 200.0 WHERE username = ?
2018-09-19 14:26:12,499 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ICBCUserMoneyDao.saveMoney
DEBUG: ==> Parameters: lisi(String)
2018-09-19 14:26:12,541 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java:159) com.rocklei123.spring.transaction.transferAccount.dao.ICBCUserMoneyDao.saveMoney
DEBUG: <==    Updates: 1
2018-09-19 14:26:12,542 org.mybatis.spring.SqlSessionUtils.closeSqlSession(SqlSessionUtils.java:186) org.mybatis.spring.SqlSessionUtils
DEBUG: Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211]
李四存钱成功---------------
转账业务完成---------------
2018-09-19 14:26:12,544 org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization.beforeCommit(SqlSessionUtils.java:284) org.mybatis.spring.SqlSessionUtils
DEBUG: Transaction synchronization committing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211]
2018-09-19 14:26:12,545 org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization.beforeCompletion(SqlSessionUtils.java:310) org.mybatis.spring.SqlSessionUtils
DEBUG: Transaction synchronization deregistering SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211]
2018-09-19 14:26:12,546 org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization.beforeCompletion(SqlSessionUtils.java:315) org.mybatis.spring.SqlSessionUtils
DEBUG: Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4db1f211]
2018-09-19 14:26:12,546 org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:755) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Initiating transaction commit
2018-09-19 14:26:12,547 org.springframework.jdbc.datasource.DataSourceTransactionManager.doCommit(DataSourceTransactionManager.java:269) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Committing JDBC transaction on Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver]
2018-09-19 14:26:12,552 org.springframework.jdbc.datasource.DataSourceTransactionManager.doCleanupAfterCompletion(DataSourceTransactionManager.java:327) org.springframework.jdbc.datasource.DataSourceTransactionManager
DEBUG: Releasing JDBC Connection [jdbc:oracle:thin:@127.0.0.1:1521:XE, UserName=APPROBE, Oracle JDBC driver] after transaction
2018-09-19 14:26:12,553 org.springframework.jdbc.datasource.DataSourceUtils.doReleaseConnection(DataSourceUtils.java:327) org.springframework.jdbc.datasource.DataSourceUtils
DEBUG: Returning JDBC Connection to DataSource
test转账业务完成.........

4.4 回滚失败原因

在SpringIoC容器中返回的调用的对象是代理对象而不是真实的对象，只有被动态代理直接调用的才会产生事务。this调用并非代理对象。

4.5 回滚失败解决办法

通过AopContext.currentProxy(); 获取代理对象，通过代理对象调用abcBankDrawMoney()方法。

@Transactionalpublic void transferAccountRequiresNew(String username1, String username2, double money) {try {TransferAccountsService proxy = (TransferAccountsService) AopContext.currentProxy();proxy.abcBankDrawMoney(username1, money);} catch (Exception e) {e.printStackTrace();}System.out.println("准备开始为李四存钱业务---------------");icbcUserMoneyDao.saveMoney(username2, money);System.out.println("李四存钱成功---------------");System.out.println("转账业务完成---------------");}

可能出现如下异常：

java.lang.IllegalStateException: Cannot find current proxy: Set 'exposeProxy' property on Advised to 'true' to make it available.at org.springframework.aop.framework.AopContext.currentProxy(AopContext.java:64)at com.rocklei123.spring.transaction.transferAccount.service.Impl.TransferAccountsServiceImpl.transferAccountRequiresNew(TransferAccountsServiceImpl.java:62)

解决办法在spring 配置文件中设置

    <aop:aspectj-autoproxy expose-proxy="true"/>

小技巧：可以使用如下代码 确认你的bean 是代理对象吗？

AopUtils.isAopProxy()
AopUtils.isCglibProxy() //cglib
AopUtils.isJdkDynamicProxy() //jdk动态代理

5.其他原因导致回滚失败

  • mysql数据库且引擎是MyISAM造成的（因为不支持事务），改成InnoDB即可。

6.总结

本文总结了几种spring事务无法回滚的原因，总结如下：

  • try{}catch{} catch到非RuntimeException，并且未处理。默认spring仅对Error和RuntimeException 异常才回滚
  • this调用导致回滚失败。只有被动态代理直接调用的才会产生事务
  • mysql数据库且引擎是MyISAM造成的（因为不支持事务），改成InnoDB即可。

7.参考

http://jinnianshilongnian.iteye.com/blog/1850432

图灵学院张飞老师–《架构师不得不知道的Spring事物不能回滚的深层次原因-张飞》

8.欢迎持续关注

米宝窝 https://rocklei123.github.io/

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