通過登錄事件偵聽器中的另一個事務錯誤更新或刪除了行？

Question

我有一個簡單的彈簧安全登錄事件偵聽器註冊爲

class LoginEventListener implements 
    ApplicationListener<InteractiveAuthenticationSuccessEvent> { 

    //deal with successful login 
    void onApplicationEvent(InteractiveAuthenticationSuccessEvent event) { 
     User.withTransaction { 

      def user = User.get(event.authentication.principal.id) 
      user.lastLoginTime = new Date() // update login time 
      user.save() 

     } 


    } 


} 

在日誌中每隔幾登錄嘗試我得到的錯誤是

ERROR 2017-06-13 16:24:04,090 [ajp-bio-8109-exec-4561] events.PatchedDefaultFlushEventListener: Could not synchronize database state with session 
org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [User#2876] 
    at org.grails.datastore.gorm.GormStaticApi.withTransaction(GormStaticApi.groovy:686) 
    at com.runnercard.LoginEventListener.onApplicationEvent(LoginEventListener.groovy:12) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:745) 

我想知道我怎樣才能避免這種情況錯誤？我感謝任何幫助！謝謝！

Answer 1

嘗試使用鎖

def user = User.get(event.authentication.principal.id ,[lock: true])