인프런 커뮤니티 질문&답변

해당 오류입니다.

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'singletonWithPrototypeTest1.ClientBean': Unsatisfied dependency expressed through field 'prototypeBeanProvider': No qualifying bean of type 'javax.inject.Provider<hello.core.scope.SingletonWithPrototypeTest1$PrototypeBean>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

빈 주입이 안되어 오류가 나는 것 같아 @ComponentScan도 달아봤습니다. 빈을 못찾는다고 할까요

package hello.core.scope;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import javax.inject.Provider;

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

@ComponentScan
public class SingletonWithPrototypeTest1 {

@Test
void prototypeFind() {
AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(PrototypeBean.class);
PrototypeBean prototypeBean1 = ac.getBean(PrototypeBean.class);
prototypeBean1.addCount();
assertThat(prototypeBean1.getCount()).isEqualTo(1);


PrototypeBean prototypeBean2 = ac.getBean(PrototypeBean.class);
prototypeBean2.addCount();
assertThat(prototypeBean2.getCount()).isEqualTo(1);
}

@Test
void singletonClientUserPrototype(){
// 스프링 컨텍스트를 생성하고 빈을 가져옴
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(1);
// 같은 count가 증가함
}

@Scope("singleton")
@Component
static class ClientBean{

// ObjectProvider를 통해 싱글톤 빈과 프로토타입을 함께 사용가능
@Autowired
private Provider<PrototypeBean> prototypeBeanProvider;

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

@Scope("prototype")
@Component
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" + this);
}
}
}