如何为合格的和限定范围的CDI bean创建通用生产者？

Question

I am trying to do something like the following:

@Qualifier
@Retention(RUNTIME)
@Target({ PARAMETER, FIELD, METHOD, TYPE })
public @interface ForQueueName{
    String value();
}

public class JmsSenderProducer {
    @Produces
    @Any
    @ApplicationScoped
    public JmsSender createJmsSender(InjectionPoint ip) {
        ForQueueName annotation = ip.getAnnotated().getAnnotation(ForQueueName.class);
        return new JmsSender(annotation.value());
    }
}

// Somewhere else
@Inject
@ForQueueName("java:/jms/queue/my.queue.name")
JmsSender myQueueSender;

Of course this does not work because

1. @Any does not work as a replacement for any qualified @ForQueueName
2. InjectionPoint cannot be used when producing @ApplicationScoped bean.

I know I could create @Dependent scoped beans with a nonbinding qualifier this way. But in my case I actually need a non dependent scoped bean.

Is something like the intended possible? If not, is there a particular reason why?

Cheers, Tilmann

EDIT: Fixed scope name from @Default to @Dependent

Answer 1

First, you should consider using JMSContext in your app. Its a JMS 2.0 feature with a much cleaner API.

Second, your producer method should be annotated with ForQueueName . For that to work, the value() attribute of ForQueueName needs to be marked as @Nonbinding . This tells the CDI container that the value should not be considered when looking up the producer.

@Qualifier
@Retention(RUNTIME)
@Target({ PARAMETER, FIELD, METHOD, TYPE })
public @interface ForQueueName{
    @Nonbinding String value();
}

public class JmsSenderProducer {
    @Produces
    @ForQueueName("")
    @Dependent // must be dependent to interrogate the injection point
    public JmsSender createJmsSender(InjectionPoint ip) {
        ForQueueName annotation = ip.getAnnotated().getAnnotation(ForQueueName.class);
        return new JmsSender(annotation.value());
    }
}

// Somewhere else
@Inject
@ForQueueName("java:/jms/queue/my.queue.name")
JmsSender myQueueSender;