인프런 커뮤니티 질문&답변

밑에 코드 중에

AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(ClientBean.class, PrototypeBean.class);

이 코드가 이해가 안되서 질문 드립니다. 강사님이 이렇게 코드를 작성하면 자동으로 component scan이 된다고 하셨는데, 밑에 ClientBean과 PrototypeBean은 @Component어노테이션이 없습니다. 따라서 @Autowired도 안되는거 아닌가요??

package hello.core.scope;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

import static org.assertj.core.api.Assertions.assertThat;

public class SingletonWithPrototypeTest1 {

    @Test
    void singletonClientUsePrototype(){
        AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(ClientBean.class, PrototypeBean.class);

        ClientBean clientBean1 = ac.getBean(ClientBean.class);
        int count1 = clientBean1.logic();
        assertThat(count1).isEqualTo(1);

        ClientBean clientBean2 = ac.getBean(ClientBean.class);
        int count2 = clientBean2.logic();
        assertThat(count2).isEqualTo(2);


    }

    @Scope("singleton")
    static class ClientBean{
        private final PrototypeBean prototypeBean;

        @Autowired
        public ClientBean(PrototypeBean prototypeBean) {
            this.prototypeBean = prototypeBean;
        }

        public int logic(){
            prototypeBean.addCount();
            return prototypeBean.getCount();
        }
    }

    @Scope("prototype")
    static class PrototypeBean {
        private int count = 0;

        public void addCount() {
            count++;

        }

        public int getCount() {
            return count;
        }

        @PostConstruct
        public void init() {
            System.out.println("PrototypeBean.init = " + this);
        }

        @PreDestroy
        public void destroy() {
            System.out.println("PrototypeBean.destroy");
        }
    }
}