Java Spring: How to avoid using call @Transactional method from the neighboring non-transactional method?

Question

Desc

I'm working on the Java Spring project. I've faced the behavior "transaction rollback doesn't work when calling from the same class".

• My IDE (IDEA) doesn't highlight it.
• The compiler doesn't throw an exception.
• The project is very big, and our team is big, and it is very easy to make this mistake.

The question

How to strictly avoid this mistake in a big project?
I wonder - maybe there is an automated solution to not build a project with such mistakes?

Example:

@Service
class MyServiceImpl {
    @Transactional(rollbackFor=Exception.class)
    void method1 () { // direct call works fine.
    }
    void method2 () {
      method1(); // the same class call won't be transactional. Rollback won't work.
    }
}

Manual solutions are already discovered there:

• Is it possible to invoke transactional method from non transactional method in Spring?
• Spring @Transaction method call by the method within the same class, does not work?
• etc...

Any suggestions and ideas?