JPA 存储库 OptimisticLockingException 未抛出

Question

我编写了一个 JPA 存储库和一个带有版本字段的实体来支持乐观锁定。

    @Version
    var version: Long? = null

我编写了一个测试，模拟并发更新和删除，并且确实期望某种 OptimisticLockingException

// precondition
2 retries in database

@Transactional
fun update(id: String){
    val existing = repository.findById(id)
    // DELETE 
    // some concurrent code execution deleting the entry with id 2 in different transaction

    // MODIFY list entry with id 2 
    repo.saveAll(existing)
}

When debugging, I can see that one entry is deleted in the database. (after the concurrent delete thread)
I would expect some kind of OptimisticLockingException on the call to save.

But JPA rather inserts the modified entry again, so that the delete is overwritten.

Answer 1

我可以解决这个问题。 放置 @Transactional 的方法是从同一个类内部调用的。

@Transactional 未激活