Inflearn Community Q&A

package hello.core.scope;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Provider;

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

public class SingletonWithPrototypeTest2 {

    @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, PrototypeBean.class);
        int count2 = clientBean2.logic();
        assertThat(count2).isEqualTo(1);
    }

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

        public int logic() {
            PrototypeBean prototypeBean1 = prototypeBean;
            prototypeBean1.addCount();
            int count = prototypeBean1.getCount();
            return count;
        }
    }

    @Scope(value = "prototype", proxyMode = ScopedProxyMode.TARGET_CLASS)
    static class PrototypeBean {
        private int count = 0;

        public void addCount() {
            System.out.println("count = " + count + " : " + this);
            count++;
        }

        public int getCount() {
            System.out.println("count = " + count + " : " + this);
            return count;
        }

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

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

1, ProxyMode를 사용했을 경우 addCount() 와 getCount() 호출 시 같은 PrototypeBean을 사용하게 할 순 없나요?

2. 위에서 addCount() 와 getCount() 호출 시 다른 PrototypeBean이 생성되는 이유가 무엇인가요?