CDI Eager Application scoped bean

问题

Since @ManagedBean(eager = true) will be deprecated, How do you create a eager application scoped cdi bean?

回答1:

Solved this by making use of CDI extension framework:

1. Create Qualifier:

   @Qualifier
   @Target(value = {ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER,     ElementType.TYPE})
   @Retention(value = RetentionPolicy.RUNTIME)
   public @interface Eager {
   }
   

2. Create Extension implementation with observer method:

   public class EagerCDIExtension implements Extension {
   
           public void afterDeploymentValidation(@Observes AfterDeploymentValidation event, BeanManager beanManager) {
           beanManager.getBeans(Object.class, new AnnotationLiteral<Eager>() {
           }).parallelStream().filter(bean -> bean.getBeanClass().isAnnotationPresent(ApplicationScoped.class)).forEach(bean -> {
               beanManager.getReference(bean, bean.getBeanClass(), beanManager.createCreationalContext(bean)).toString();
           });
       }
   }
   

3. Create: META-INF/services/javax.enterprise.inject.spi.Extension

4. Register extension implementatoin class in above file i.e:

   pypackage.EagerCDIExtension
   

来源：https://stackoverflow.com/questions/22781554/cdi-eager-application-scoped-bean