How to @Autowired a concrete implementation of a service?

Question

I have the following situation:

public interface ServiceAura extends Serializable { }

@Service
public class ServiceA implements ServiceAura {
    ....
}

@Service
public class ServiceB implements ServiceAura {
    ....
}

Now from the controller I need to call both of them by separate:

@Path("")
@Controller
public class ServiciosAuraPortalRESTfulService {

    @Autowired
    private ServiceAura srvA;

    @Autowired
    private ServiceAura srvB;

}

I have read about @Qualified, is this the only way? How can I archive this?

Answer 1

You're right. You can use @Qualifier("ServiceA") to specify which implementation you want to autowire.

@Path("")
@Controller
public class ServiciosAuraPortalRESTfulService {

    @Autowired
    @Qualifier("ServiceA")
    private ServiceAura srvA;

    @Autowired
    @Qualifier("ServiceB")
    private ServiceAura srvB;

}

On the service itself, you can use the annotation @Primary to specify which one is the default implementation that you want.

Alternatively, you can use the application context to retrieve a specific bean. You'll need to autowire the ApplicationContext class and then retrieve it with ServiceAura srvA = context.getBean(ServiceA.class);