CDI

This is an abstract class that uses Java Service Loader to retrieve a concrete CDI class from the implementation:

CDI<Object> cdi = CDI.current();

CDI gives faster access to the BeanManager with the CDI.getBeanManager() method, but more interestingly, a simple way to request a contextual instance is provided without using the impactful code through the BeanManager.

Because CDI extends Instance<Object>, the contextual instance resolution is naturally provided through a programmatic lookup.

To make it simple, the access to CDI in our non CDI code, the specifications provide an alternative to the injection. Here you can see the injection of a bean:

@Inject @Any Instance<Object> cdi;

The same thing can be done through the CDI class as:

CDI<Object> cdi = CDI.current();
  MyService service = cdi.select(MyService.class).get();