How to do conditional auto-wiring in Spring?

Question

Has anyone tried to auto-wire different beans into a Spring-managed bean based on a condition? For e.g. if some condition is met, inject class A, else B? I saw in one of the

Answer 1

I suppose the simpest way:

@Autowired @Lazy
protected A a;

@Autowired @Lazy
protected B b;

void do(){
  if(...) { // any condition
     // use a
  } else {
     // use b
  }
}

In case you do not declare nessassary bean, Spring throws at runtime NoSuchBeanDefinitionException