How to instantiate more CDI beans for one class?

Question

Note: The similar question has been already asked three years ago, in time of EE 6, see how to instantiate more then one CDI/Weld bean for one class? Has so

Answer 1

I would create qualifiers FooQualifier,HooQualifier and Producer for MyBean, something like this:

@ApplicationScoped
public class MyBeanProducer {

    @Produces
    @FooQualifier
    public MyBean fooProducer() {
        return new MyBean(42);
    }

    @Produces
    @HooQualifier
    public MyBean hooProducer() {
        return new MyBean(666);
    }
}

Then if you somewhere do:

    @Inject
    @FooQualifier
    private MyBean foo;

You will have MyBean instance with foo.getSomeProperty() equal to 42 and if you do:

@Inject
@HooQualifier
private MyBean hoo;

you will have MyBean instance with foo.getSomeProperty() equal to 666.

Another possibility is to have one configurable qualifier:

@Target( { TYPE, METHOD, PARAMETER, FIELD })
@Retention(RUNTIME)
@Documented
@Qualifier
public @interface ConfigurableQualifier {

    @Nonbinding
    int value() default 0;
}

and then producer method:

@Produces
@ConfigurableQualifier
public MyBean configurableProducer(InjectionPoint ip){
    int somePropertyValue = ip.getAnnotated().getAnnotation(ConfigurableQualifier.class).value();
    return new MyBean(somePropertyValue);
}

then simply calling:

@Inject
@ConfigurableQualifier(value = 11)
private MyBean configurableBean;

will result in MyBean instance with someProperty equal to 11.