一篇文章带你了解spring事务失效的多种场景

目录

• 前言
• 一 事务不生效

• 1.访问权限问题
• 2. 方法用final修饰
• 3.方法内部调用
• 4.未被spring管理
• 5.多线程调用
• 6.表不支持事务
• 7.未开启事务

• 1.错误的传播特性
• 2.自己吞了异常
• 3.手动抛了别的异常
• 4.自定义了回滚异常
• 5.嵌套事务回滚多了

• 1 大事务问题
• 2.编程式事务

@Service
public class UserService {
    @Transactional
    private void add(UserModel userModel) {
         saveData(userModel);
         updateData(userModel);
    }
}

protected TransactionAttribute computeTransactionAttribute(Method method, @Nullable Class<?> targetClass) {
    // Don't allow no-public methods as required.
    if (allowPublicMethodsOnly() && !Modifier.isPublic(method.getModifiers())) {
      return null;
    }
    // The method may be on an interface, but we need attributes from the target class.
    // If the target class is null, the method will be unchanged.
    Method specificMethod = AopUtils.getMostSpecificMethod(method, targetClass);
    // First try is the method in the target class.
    TransactionAttribute txAttr = findTransactionAttribute(specificMethod);
    if (txAttr != null) {
      return txAttr;
    }
    // Second try is the transaction attribute on the target class.
    txAttr = findTransactionAttribute(specificMethod.getDeclaringClass());
    if (txAttr != null && ClassUtils.isUserLevelMethod(method)) {
      return txAttr;
    }
    if (specificMethod != method) {
      // Fallback is to look at the original method.
      txAttr = findTransactionAttribute(method);
      if (txAttr != null) {
        return txAttr;
      }
      // Last fallback is the class of the original method.
      txAttr = findTransactionAttribute(method.getDeclaringClass());
      if (txAttr != null && ClassUtils.isUserLevelMethod(method)) {
        return txAttr;
      }
    }
    return null;
  }

@Service
public class UserService {
    @Transactional
    public final void add(UserModel userModel){
        saveData(userModel);
        updateData(userModel);
    }
}

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;
    @Transactional
    public void add(UserModel userModel) {
        userMapper.insertUser(userModel);
        updateStatus(userModel);
    }
    @Transactional
    public void updateStatus(UserModel userModel) {
        doSameThing();
    }
}

@Servcie
public class ServiceA {
   @Autowired
   prvate ServiceB serviceB;
   public void save(User user) {
         queryData1();
         queryData2();
         serviceB.doSave(user);
   }
 }
 @Servcie
 public class ServiceB {
    @Transactional(rollbackFor=Exception.class)
    public void doSave(User user) {
       addData1();
       updateData2();
    }
 }

@Servcie
public class ServiceA {
   @Autowired
   prvate ServiceA serviceA;
   public void save(User user) {
         queryData1();
         queryData2();
         serviceA.doSave(user);
   }
   @Transactional(rollbackFor=Exception.class)
   public void doSave(User user) {
       addData1();
       updateData2();
    }
 }

@Servcie
public class ServiceA {
   public void save(User user) {
         queryData1();
         queryData2();
         ((ServiceA)AopContext.currentProxy()).doSave(user);
   }
   @Transactional(rollbackFor=Exception.class)
   public void doSave(User user) {
       addData1();
       updateData2();
    }
 }

//@Service
public class UserService {
    @Transactional
    public void add(UserModel userModel) {
         saveData(userModel);
         updateData(userModel);
    }    
}

@Slf4j
@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private RoleService roleService;
    @Transactional
    public void add(UserModel userModel) throws Exception {
        userMapper.insertUser(userModel);
        new Thread(() -> {
            roleService.doOtherThing();
        }).start();
    }
}
@Service
public class RoleService {
    @Transactional
    public void doOtherThing() {
        System.out.println("保存role表数据");
    }
}

private static final ThreadLocal<Map<Object, Object>> resources =
  new NamedThreadLocal<>("Transactional resources");

CREATE TABLE `category` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `one_category` varchar(20) COLLATE utf8mb4_bin DEFAULT NULL,
  `two_category` varchar(20) COLLATE utf8mb4_bin DEFAULT NULL,
  `three_category` varchar(20) COLLATE utf8mb4_bin DEFAULT NULL,
  `four_category` varchar(20) COLLATE utf8mb4_bin DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin

<!-- 配置事务管理器 --> 
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager"> 
    <property name="dataSource" ref="dataSource"></property> 
</bean> 
<tx:advice id="advice" transaction-manager="transactionManager"> 
    <tx:attributes> 
        <tx:method name="*" propagation="REQUIRED"/>
    </tx:attributes> 
</tx:advice> 
<!-- 用切点把事务切进去 --> 
<aop:config> 
    <aop:pointcut expression="execution(* com.susan.*.*(..))" id="pointcut"/> 
    <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/> 
</aop:config> 

@Service
public class UserService {
    @Transactional(propagation = Propagation.NEVER)
    public void add(UserModel userModel) {
        saveData(userModel);
        updateData(userModel);
    }
}

@Slf4j
@Service
public class UserService {
    @Transactional
    public void add(UserModel userModel) {
        try {
            saveData(userModel);
            updateData(userModel);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        }
    }
}

@Slf4j
@Service
public class UserService {
    @Transactional
    public void add(UserModel userModel) throws Exception {
        try {
             saveData(userModel);
             updateData(userModel);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            throw new Exception(e);
        }
    }
}

@Slf4j
@Service
public class UserService {
    @Transactional(rollbackFor = BusinessException.class)
    public void add(UserModel userModel) throws Exception {
       saveData(userModel);
       updateData(userModel);
    }
}

public class UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private RoleService roleService;
    @Transactional
    public void add(UserModel userModel) throws Exception {
        userMapper.insertUser(userModel);
        roleService.doOtherThing();
    }
}
@Service
public class RoleService {
    @Transactional(propagation = Propagation.NESTED)
    public void doOtherThing() {
        System.out.println("保存role表数据");
    }
}

@Slf4j
@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private RoleService roleService;
    @Transactional
    public void add(UserModel userModel) throws Exception {
        userMapper.insertUser(userModel);
        try {
            roleService.doOtherThing();
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        }
    }
}

@Service
public class UserService {
    @Autowired 
    private RoleService roleService;
    @Transactional
    public void add(UserModel userModel) throws Exception {
       query1();
       query2();
       query3();
       roleService.save(userModel);
       update(userModel);
    }
}
@Service
public class RoleService {
    @Autowired 
    private RoleService roleService;
    @Transactional
    public void save(UserModel userModel) throws Exception {
       query4();
       query5();
       query6();
       saveData(userModel);
    }
}

roleService.save(userModel);
update(userModel);

saveData(userModel);

   @Autowired
   private TransactionTemplate transactionTemplate;
   ...
   public void save(final User user) {
         queryData1();
         queryData2();
         transactionTemplate.execute((status) => {
            addData1();
            updateData2();
            return Boolean.TRUE;
         })
   }