Hands-On Microservices with Kotlin

Using components

The component scan, while scanning all our packages, needs to understand if any of the classes it found should be added to the spring context as a bean, in order to know which classes need to be added, it will check if the class is annotated with the annotation @Component.

In IntelliJ, we can navigate to a class holding control and click on a class name, for example, if we go to our example, hold control, and click on the @Controller.

To visualize this, we can just view the source code of the @Controller annotation:

@Target({ElementType.TYPE})@Retention(RetentionPolicy.RUNTIME)@Documented@Componentpublic @interface Controller {  String value() default "";}

The @Controller annotation uses the @Component annotation, so the component ...