BeanFactoryAnnotationUtils.qualifiedBeanOfType does not work for @Qualifier on bean class [SPR-13819]

[spring-projects-issues]

Emilien Guenichon opened SPR-13819 and commented

The BeanFactoryAnnotationUtils.qualifiedBeanOfType method doesn't match the qualified bean even with the good qualifier given and interface.

As you can see from the StackOverflow link.
And from an execution of the attached project.

QualifiedInterface processor = BeanFactoryAnnotationUtils.qualifiedBeanOfType(
beanFactory, QualifiedInterface.class, "QualifierA");

System.out.println("The selected processor should be A " + processor);

An interface QualifiedInterface.java

public interface QualifiedInterface {

}
Two beans QualifiedA.java

@Component
@Qualifier("QualifierA")
public class QualifiedA implements QualifiedInterface {

@Override
public String toString() {
    return "QualifiedA";
}

}

and QualifiedB.java :

@Component
@Qualifier("QualifierB")
public class QualifiedB implements QualifiedInterface {

@Override
public String toString() {
    return "QualifiedB";
}

}

Here a log of the execution (care about qualifier names and case as I tried to lower them between the stackoverflow tickets and this JIRA)

2015-12-24 16:14:50.445 INFO 9852 --- [ main] b.sample.Application : Starting Application on DTBE-DEV4 with PID 9852 (D:\Workspace_netbeans\BeanFactoryAnnotationUtilsProblem\target\classes started by eguenichon in D:\Workspace_netbeans\BeanFactoryAnnotationUtilsProblem)
2015-12-24 16:14:50.449 INFO 9852 --- [ main] b.sample.Application : No active profile set, falling back to default profiles: default
2015-12-24 16:14:50.535 INFO 9852 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@5390ecf8: startup date [Thu Dec 24 16:14:50 CET 2015]; root of context hierarchy
2015-12-24 16:14:53.251 INFO 9852 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2015-12-24 16:14:53.266 INFO 9852 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0
2015-12-24 16:14:53.485 INFO 9852 --- [ main] b.sample.Application : Started Application in 3.662 seconds (JVM running for 4.154)
Existing qualified beans ...
qualifiera

• @org.springframework.stereotype.Component(value=)
• @org.springframework.beans.factory.annotation.Qualifier(value=qualifiera)
  qualifierb
• @org.springframework.stereotype.Component(value=)
• @org.springframework.beans.factory.annotation.Qualifier(value=qualifierb)
  Existing qualified beans from context ...
  qualifiera
• @org.springframework.stereotype.Component(value=)
• @org.springframework.beans.factory.annotation.Qualifier(value=qualifiera)
  qualifierb
• @org.springframework.stereotype.Component(value=)
• @org.springframework.beans.factory.annotation.Qualifier(value=qualifierb)
  Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'qualifiera' is defined: No matching QualifiedInterface bean found for qualifier 'qualifiera' - neither qualifier match nor bean name match!
  at org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:98)
  at org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils.qualifiedBeanOfType(BeanFactoryAnnotationUtils.java:55)
  at beanfactoryannotationutils.sample.Application.main(Application.java:45)
  2015-12-24 16:14:53.496 INFO 9852 --- [ Thread-1] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@5390ecf8: startup date [Thu Dec 24 16:14:50 CET 2015]; root of context hierarchy
  2015-12-24 16:14:53.498 INFO 9852 --- [ Thread-1] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
  2015-12-24 16:14:53.503 INFO 9852 --- [ Thread-1] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown

---

Affects: 4.2.4

Reference URL: http://stackoverflow.com/questions/34451782/whats-wrong-within-the-usage-of-beanfactoryannotationutils

Attachments:

• BeanFactoryAnnotationUtilsProblem.7z (6.56 MB)

Issue Links:

• Enable Executor qualification with @Async [SPR-6847] #11513 Enable Executor qualification with @Async
• Support custom qualifier annotations in @Transactional [SPR-13452] #18032 Support custom qualifier annotations in @Transactional

Referenced from: commits 1d8a3e1

[spring-projects-issues]

Juergen Hoeller commented

Due to its origin (i.e. transaction manager selection and async executor selection), BeanFactoryAnnotationUtils historically just deals with qualifier values on explicit bean definitions and with analogous qualifier annotations on @Bean factory methods. It simply does not honor qualifier annotations on bean classes at all since those do not occur in the original scenarios that motivated this utility class in the first place.

Of course, arguably BeanFactoryAnnotationUtils should be extended to cover that variant as well, bringing it in sync with QualifierAnnotationAutowireCandidateResolver's algorithm for injection point matching. I've turned this issue into a corresponding feature ticket, to be addressed for 4.3.

Juergen

[spring-projects-issues]

Juergen Hoeller commented

This will be available in the upcoming 4.3.0.BUILD-SNAPSHOT... Feel free to give it an early try!

Juergen