事务配置在Spring启动中失败

Question

更新：

我发现我将类A注入到扩展外部类的类C中，该类不受spring管理，如下所示：

public class C extends ExternalClass {    
    @AutoWired
    private A a;
    //doSomething...    
}

这应该是交易失败的主要原因。

另一个问题：有没有办法让spring管理类A的事务，该类已经注入到非spring处理的anothor类中？

我正在用Spring Boot和Mybatis建立一个项目。

我有一个问题，其中一个服务类无法创建事务连接，也不会执行回滚。

我发现，如果我去掉B类中A类的注入，就像这样：

class A{
    //@Autowired
    //private B b;
    // b is not used in this class
    @Autowired
    private ADao dao;
}

class B{
    @Autowired 
    private BDao dao;

    //Transaction of this method failed
    //session didn't roll back
     public void (){
          dao.insert(new Entity ());
          //Exception here
     }
}

类B创建的连接将是事务性的。两个类都在同一个包中，但是如果我添加那个注入，事务就会失败。让我很困惑的是，类B可以注入到其他类中，事务也会工作得很好。

这是日志：

2018-01-05 21:30:33.861 DEBUG 10346 --- [http-nio-8099-exec-2] org.mybatis.spring.SqlSessionUtils       97 : Creating a new SqlSession
2018-01-05 21:30:33.866 DEBUG 10346 --- [http-nio-8099-exec-2] org.mybatis.spring.SqlSessionUtils       148 : SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@3aeb5ca8] was not registered for synchronization because synchronization is not active
2018-01-05 21:30:33.888 DEBUG 10346 --- [http-nio-8099-exec-2] o.s.jdbc.datasource.DataSourceUtils      110 : Fetching JDBC Connection from DataSource
2018-01-05 21:30:33.888 DEBUG 10346 --- [http-nio-8099-exec-2] o.s.j.d.DriverManagerDataSource          142 : Creating new JDBC DriverManager Connection to [jdbc:mariadb://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true]
2018-01-05 21:30:33.905 DEBUG 10346 --- [http-nio-8099-exec-2] o.m.s.t.SpringManagedTransaction         87 : JDBC Connection [org.mariadb.jdbc.MySQLConnection@2bad8689] will not be managed by Spring
2018-01-05 21:30:33.908 DEBUG 10346 --- [http-nio-8099-exec-2] p.c.z.admin.dao.UserDao.insertSelective  159 : ==>  Preparing: INSERT INTO sys_user ( id,username ) VALUES( ?,? ) 
2018-01-05 21:30:33.916 DEBUG 10346 --- [http-nio-8099-exec-2] p.c.z.admin.dao.UserDao.insertSelective  159 : ==> Parameters: null, test(String)
2018-01-05 21:30:33.929 DEBUG 10346 --- [http-nio-8099-exec-2] p.c.z.admin.dao.UserDao.insertSelective  159 : <==    Updates: 1
2018-01-05 21:30:33.932 DEBUG 10346 --- [http-nio-8099-exec-2] p.c.z.a.d.U.insertSelective!selectKey    159 : ==>  Executing: SELECT LAST_INSERT_ID() 
2018-01-05 21:30:33.940 DEBUG 10346 --- [http-nio-8099-exec-2] p.c.z.a.d.U.insertSelective!selectKey    159 : <==      Total: 1
2018-01-05 21:30:33.942 DEBUG 10346 --- [http-nio-8099-exec-2] org.mybatis.spring.SqlSessionUtils       191 : Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@3aeb5ca8]

我尝试了3种配置事务的方法：

使用java配置：

@Bean(name = "transactionInterceptor")
public TransactionInterceptor transactionInterceptor(PlatformTransactionManager platformTransactionManager) {
    TransactionInterceptor transactionInterceptor = new TransactionInterceptor();
    transactionInterceptor.setTransactionManager(platformTransactionManager);
    Properties transactionAttributes = new Properties();
    transactionAttributes.setProperty("insert*","PROPAGATION_REQUIRED,-Throwable");
    transactionAttributes.setProperty("update*","PROPAGATION_REQUIRED,-Throwable");
    transactionAttributes.setProperty("delete*","PROPAGATION_REQUIRED,-Throwable");
    transactionAttributes.setProperty("select*","PROPAGATION_REQUIRED,-Throwable,readOnly");
    transactionInterceptor.setTransactionAttributes(transactionAttributes);
    return transactionInterceptor;
}

@Bean
public BeanNameAutoProxyCreator transactionAutoProxy() {
    BeanNameAutoProxyCreator transactionAutoProxy = new BeanNameAutoProxyCreator();
    transactionAutoProxy.setProxyTargetClass(true);
    transactionAutoProxy.setBeanNames("*ServiceImpl");
    transactionAutoProxy.setInterceptorNames("transactionInterceptor");
    return transactionAutoProxy;
}

并使用xml：

<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="save*" propagation="REQUIRED"/>
        <tx:method name="del*" propagation="REQUIRED"/>
        <tx:method name="update*" propagation="REQUIRED"/>
        <tx:method name="insert*" propagation="REQUIRED"/>
        <tx:method name="*" rollback-for="Exception"/>
    </tx:attributes>
</tx:advice>

<aop:config>
    <aop:pointcut id="services"
                  expression="execution(* root.*.service.*.*(..))"/>
    <aop:advisor pointcut-ref="services" advice-ref="txAdvice"/>
</aop:config>

和@Transactional。然而，它们都不起作用。

Answer 1

问题是，如果您将一个类注入到另一个不是spring管理的bean的类中，那么spring事务管理将失败。因此，当事务失败时，检查是否存在错误的依赖注入。