Question

我使用Spring Data Jpa＆amp;冬眠。

以下是我得到的例外情况：

2017-05-21 21:42:20.761 DEBUG 11765 --- [nio-8080-exec-5] o.h.e.t.internal.TransactionImpl         : committing
2017-05-21 21:42:20.765  INFO 11765 --- [nio-8080-exec-5] i.StatisticalLoggingSessionEventListener : Session Metrics {
    14574 nanoseconds spent acquiring 1 JDBC connections;
    0 nanoseconds spent releasing 0 JDBC connections;
    55978 nanoseconds spent preparing 2 JDBC statements;
    2315850 nanoseconds spent executing 2 JDBC statements;
    0 nanoseconds spent executing 0 JDBC batches;
    0 nanoseconds spent performing 0 L2C puts;
    0 nanoseconds spent performing 0 L2C hits;
    0 nanoseconds spent performing 0 L2C misses;
    0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
    0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}
2017-05-21 21:42:20.779 ERROR 11765 --- [nio-8080-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query] with root cause

javax.persistence.TransactionRequiredException: Executing an update/delete query

当我从AspectJ模式更改我的事务管理时

@EnableTransactionManagement(mode = AdviceMode.ASPECTJ)

默认代理模式：

@EnableTransactionManagement

不再发生异常。

以下是调用顺序的方法：

来自MessageRestController：

@RestController
...
@PatchMapping("mark-messages-as-read/{otherId}")
public void markMessagesAsRead(@CurrentUserAccount UserAccount me, @PathVariable Long otherId) {
    UserAccount other = userAccountService.findUserAccountById(otherId);
    messageService.markMessagesAsRead(me, other);
}

来自MessageService：

@Service
@Transactional
...
@Override
public void markMessagesAsRead(UserAccount me, UserAccount other) {
    Assert.notNull(me);
    Assert.notNull(other);
    messageRepository.markMessagesAsRead(me, other);
}

来自MessageRepository：

@Modifying
@Query("update Message m set m.messageRead = true where m.recipient = :me and m.sender= :other")
void markMessagesAsRead(@Param("me") UserAccount me, @Param("other") UserAccount other);

我非常好奇知道为什么从 AspectJ模式切换到代理模式会导致异常不再发生。

有人可以提出建议吗？

编辑：这是服务实现声明：

@Service
@Transactional
public class MessageServiceImpl implements MessageService {

并从服务界面：

void markMessagesAsRead(UserAccount me, UserAccount other);

Answer 1

您是否阅读过使用AspectJ的官方documentation？

您必须使用AspectJ来编织应用程序代码。

当然，使用默认设置，它可以很好地工作，因为Spring AOP正在为您的类创建运行时代理。

为什么从AspectJ切换到代理模式会导致“TransactionRequiredException：执行更新/删除查询”不再发生？

1 个答案: