Java: Inversion of Control (IoC)

Use self-invocation through a separate bean or AOP proxy.

To handle transaction self-invocation, ensure that the transactional method is called from an external class or retrieve the bean from the ApplicationContext to access the proxy. This allows Spring’s transactional proxy to intercept the call. For instance, if `OrderService` has a self-invocation issue, refactor so that `OrderService` methods are called from a separate `OrderManager` bean.