@Inject
    @Greetings(GreetingType.HELLO)
    private GreetingCard greetingCard;

      public void doGet(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
          response.setContentType("text/html");
          PrintWriter out = response.getWriter();
          out.println("<h1>" + greetingCard.sayHello() + "</h1>");
      }

public interface GreetingCard {

	String sayHello();
}

@Qualifier
@Retention(RUNTIME)
@Target({ FIELD, TYPE, METHOD })
public @interface Greetings {

	GreetingType value();

}

public enum GreetingType {

	HELLO, HI;
}

@Greetings(GreetingType.HI)
public class GreetingCardImpl implements GreetingCard {

	public String sayHello() {
		return "Hello!!!";
	}

}