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

In your @Configuration class declare a bean to be conditionally created:

@Bean
@Conditional(CustomFeatureCondition.class)
public Stuff stuff() {
    return new Stuff ();
}

In the place of using just @Autowire it with required = false option:

@Component
@Setter(onMethod_ = @Autowired(required = false))
public class AnotherStuff {
    private Stuff stuff;
    // do stuff here
}

This way you'll get Stuff bean if it exists in the context and stuff = null if it doesn't.