spring - JavaWeb中 Service 层的事务问题

Question

下面是我的Spring配置

通过上面的配置可以看出我是在所有的service中加入的事物，也就是说我的service出错了会回滚所有的提交。
那么如果遇到Aservice调用Bservice的方法，然后Bservice调用了Cservice层的方法，
A->B->C
这种情况属于事物层嵌套调用，那么问题来了我在Cservice中如果出现异常，现在是只会回滚Cservice的事物，还是会把A和B的事物都回滚。
请大牛来帮忙解释下这个问题。我也是突然想到有这种情况实际没有这么做呢~

Answer 1

I haven’t tried this. However, it is generally not recommended that service calls service. Some common ones can be placed in dao

Answer 2

propagation="REQUIRED" means that if a transaction currently exists, put it into the current transaction scope, otherwise create a new transaction. So they will all belong to the same transaction.

Answer 3

This can be defined using the propagation method of the configuration transaction. Do you want to join the current transaction or create a new transaction yourself?