Week 7 Spring Stereotype Annotations

Question 1

What are stereotype annotations used for?

Answer 1

Stereotype annotations are used for Annotation based configuration

Inside of a Spring-based project, if we have “component scanning” aka annotation scanning, we can make use of special annotations called STEREOTYPE ANNOTATIONS.

Question 2

What is the purpose of Stereotype Annotations?

Answer 2

The purpose of stereotype annotations is to easily register Spring beans and store them into the IoC container (Inversion of control container) for future use in dependency injection.

Question 3

What is the @Component annotation?

Answer 3

@Component: Serves as a generic annotation for registering a class as a Spring bean

Question 4

What is the @Service Annotation?

Answer 4

@Service: Has the same behavior as @Component. The name of @Component and @Service is the only difference. @Service by convention is meant for classes that contain business logic

Question 5

What is the @Repository annotation?

Answer 5

@Repository: Serves as an annotation for DAO classes. @Repository does add on additional behavior beyond what @Component and @Service do by introducing what is known as “exception translation”. Exceptions that occur inside of the DAO methods will be “translated” into a Spring specific exception. (Such as DataAccessException)

Question 6

What is the @Controller annotation?

Answer 6

@Controller: Used to register HTTP controllers. These beans will contain methods mapped to various endpoints