package org.jcr_blog.commons.cdi.eager;
   
    
   import java.util.ArrayList;
   import java.util.List;
   import javax.enterprise.context.ApplicationScoped;
   import javax.enterprise.event.Observes;
   import javax.enterprise.inject.spi.AfterDeploymentValidation;
   import javax.enterprise.inject.spi.Bean;
  import javax.enterprise.inject.spi.BeanManager;
  import javax.enterprise.inject.spi.Extension;
  import javax.enterprise.inject.spi.ProcessBean;
   
  public class EagerExtension implements Extension {
      private List<Bean<?>> eagerBeansList = new ArrayList<>();
   
      public <T> void collect(@Observes ProcessBean<T> event) {
          if (event.getAnnotated().isAnnotationPresent(Eager.class)
              && event.getAnnotated().isAnnotationPresent(ApplicationScoped.class)) {
              eagerBeansList.add(event.getBean());
          }
      }
   
      public void load(@Observes AfterDeploymentValidation event, BeanManager beanManager) {
          for (Bean<?> bean : eagerBeansList) {
              // note: toString() is important to instantiate the bean
              beanManager.getReference(bean, bean.getBeanClass(), beanManager.createCreationalContext(bean)).toString();
          }
      }
  }