spring - Get bean from ApplicationContext by qualifier

Question

Given this code:

public interface Service {}

@Component
@Qualifier("NotWanted")
public class NotWantedService implements Service {}

@Component
@Qualifier("Wanted")
public class WantedService implements Service {}

AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
ctx.register(NotWantedService.class);
ctx.register(WantedService.class);
ctx.refresh()

How do I now do:

ctx.getBean(Service.class)

in a way that will only get the one with @Qualifier("Wanted") and not the one with @Qualifier("NotWanted")? I'm specifically asking if it's possible to do it using getBean, not injecting to a class, then using that one as a kind of proxy.

Answer 1

You can use

BeanFactoryAnnotationUtils.qualifiedBeanOfType(ctx.getBeanFactory(), Service.class, "Wanted")

It's important to use ctx.getBeanFactory(), not ctx itself, because the 'qualifiedBeanOfType' method can resolve qualifiers only for ConfigurableListenableBeanFactory.