为什么transaction.wasCommitted（）返回false？ [英] Why does transaction.wasCommitted() return false?

问题描述

我通常对hibernate和java-ee是新手，我想知道是否有人可以告诉我为什么这段代码返回false，即使从查看数据库我可以看到事务实际上已经提交：

  session.beginTransaction（）; 
 session.saveOrUpdate（user）; 
 session.getTransaction（）。commit（）; 
 return session.getTransaction（）。wasCommitted（）; //总是假
  

谢谢！

解决方案

wascommitted（）不必总是返回 true 即使提交是<强>成功即可。如果事务通过本地事务（明确地）提交，它将返回 true false 否则。

从 docs ： -

wasCommitted
$ b 即使在成功调用
commit（）后，此方法也可能返回false。作为一个例子，如果没有启动事务，基于JTA的策略no-op对commit（）调用
;在这种情况下，他们还将
wascommitted（）报告为false。

I am new to hibernate and java-ee in general and I was wondering if anyone could tell me why this piece of code returns false even though from looking at the database I can see the transaction was actually committed:

    session.beginTransaction();
    session.saveOrUpdate(user);
    session.getTransaction().commit();
    return session.getTransaction().wasCommitted(); //Always false

Thanks!

解决方案

wasCommitted() need not always return true even if the commit was successful. It'll return true if the transaction was (unequivocally) committed via this local transaction; false otherwise.

From the docs:-

wasCommitted

This method could return false even after successful invocation of commit(). As an example, JTA based strategies no-op on commit() calls if they did not start the transaction; in that case, they also report wasCommitted() as false.

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