无法将数据库状态与 Grails Hibernate 中的会话错误同步

Posted 2023-02-27

【中文标题】无法将数据库状态与 Grails Hibernate 中的会话错误同步

【英文标题】：Could not synchronize database state with session Error in Grails Hibernate

【发布时间】：2013-07-01 02:38:46

【问题描述】：

我在我的 Grails 应用程序中注册了一个 MySecurityEventListener，用于在用户登录后设置登录次数。

MySecurityEventListener 类：

class MySecurityEventListener implements ApplicationListener<InteractiveAuthenticationSuccessEvent>, LogoutHandler 


/**
 * Handler for after login.
 */
@Override
public void onApplicationEvent(InteractiveAuthenticationSuccessEvent event) 

    User.withNewSession 
        User user = User.get(event.authentication.principal.id)
        user.lastLoginDate = new Date()     // set the last login date
        user.loginCount += 1                // increase the login count
        user.isLoggedIn = true
        user.save(flush: true)
    



/**
 * Handler for after logout.
 */
@Override
public void logout(HttpServletRequest request, HttpServletResponse response, Authentication authentication) 

    User.withNewSession 
        User user = User.get(authentication.principal.id)
        user.isLoggedIn = false
        user.save(flush: true)
    

有时当用户登录时，我会收到以下错误：

| Error 2013-07-03 13:40:56,306 [http-nio-8080-exec-1] 
ERROR    events.PatchedDefaultFlushEventListener  - 
 Could not synchronize database state with session Message: 
Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [demo.User#ffd93c5639b54405bf]
Line | Method
->>   38 | doCall             in  demo.MySecurityEventListener$_onApplicationEvent_closure1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     33 | onApplicationEvent in demo.MySecurityEventListener
|   1145 | runWorker . . . .  in java.util.concurrent.ThreadPoolExecutor
|    615 | run                in java.util.concurrent.ThreadPoolExecutor$Worker
^    722 | run . . . . . . .  in java.lang.Thread
2013-07-03 13:40:56,551 [http-nio-8080-exec-1] INFO  cpr.SessionSupport  - Session created
2013-07-03 13:40:56,554 [http-nio-8080-exec-2] INFO  cpr.SessionSupport  - Session created

| Error 2013-07-03 13:40:56,554 [http-nio-8080-exec-1] ERROR [/demo].[gsp]  -  Servlet.service() for servlet [gsp] in context with path [/demo] threw exception
Message: Object of class [demo.User] with identifier [ffd93c5639b54405bf]: optimistic   locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated   or deleted by another transaction (or unsaved-value mapping was incorrect):    [demo.User#ffd93c5639b54405bf]
Line | Method
->>   38 | doCall             in    demo.MySecurityEventListener$_onApplicationEvent_closure1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     33 | onApplicationEvent in demo.MySecurityEventListener
|   1145 | runWorker . . . .  in java.util.concurrent.ThreadPoolExecutor
|    615 | run                in java.util.concurrent.ThreadPoolExecutor$Worker
^    722 | run . . . . . . .  in java.lang.Thread
Caused by StaleObjectStateException: Row was updated or deleted by another transaction     (or unsaved-value mapping was incorrect): [demo.User#ffd93c5639b54405bf]
->>   38 | doCall             in  demo.MySecurityEventListener$_onApplicationEvent_closure1 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     33 | onApplicationEvent in demo.MySecurityEventListener
|   1145 | runWorker . . . .  in java.util.concurrent.ThreadPoolExecutor
|    615 | run                in java.util.concurrent.ThreadPoolExecutor$Worker
^    722 | run . . . . . . .  in java.lang.Thread

我该如何解决这个错误？

【问题讨论】：

使用withNewSession而不是withTransaction背后的基本原理是什么？

Npt 确定。你有什么推荐的？

withTransaction 或 withSession 使用 SessionFactory 提供的默认会话。你应该先试试。

我应该使用哪一个？如果你写一个答案我可以同意你！

希望答案有所帮助。

【参考方案1】：

withTransaction 提供对底层事务的访问。如果需要控制事务回滚，您可以使用它。

withSession 使用 SessionFactory 提供的默认会话。如果需要控制会话，请使用它。

看看你的例子，我保证withTransaction（最简单的一个）。

【讨论】：

我可以同时使用这两个吗？每个 grails 操作都在其自己的会话中处理，我说得对吗？

@confile 每个请求命中操作都有自己的休眠会话。你可以同时使用。