[Spring] 빈 조회 - 조회한 같은 타입의 빈이 모두 필요한 경우

타입이 중복되었을때 조회는 3가지방법으로 해결할수있다.
그렇다면 같은타입의 빈을 조회하고 모두 써야되는 경우라면? 의외로 간단하다!

자바기능인 List나 Map을 쓰면 끝!

테스트 전체 코드

public class AllBeanTest {

    @Test
    void findAllBean(){
        AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class, DiscountService.class);

        DiscountService discountService = ac.getBean(DiscountService.class);
        Member member = new Member(1L, "userA", Grade.VIP);
        int discountPrice = discountService.discount(member,10000,"fixDiscountPolicy");

        assertThat(discountService).isInstanceOf(DiscountService.class);
        assertThat(discountPrice).isEqualTo(1000);

        int rateDiscountPrice= discountService.discount(member,20000,"rateDiscountPolicy");
        assertThat(rateDiscountPrice).isEqualTo(2000);

    }


    static class DiscountService{
        private final Map<String, DiscountPolicy> policyMap;
        private final List<DiscountPolicy> policyList;

        @Autowired
        public DiscountService(Map<String, DiscountPolicy> policyMap, List<DiscountPolicy> policyList) {
            this.policyMap = policyMap;
            this.policyList = policyList;
            System.out.println("policyMap = " + policyMap);
            System.out.println("policyList = " + policyList);
        }

        public int discount(Member member, int price, String discountCode){
            DiscountPolicy discountPolicy = policyMap.get(discountCode);
            return discountPolicy.discount(member,price);
        }
    }
}

자자 천천히 살펴보자

        private final Map<String, DiscountPolicy> policyMap;
        private final List<DiscountPolicy> policyList;

이렇게 Map이나 List로 모든 DiscountPolicy를 주입해준뒤에

    @Test
    void findAllBean(){
        AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class, DiscountService.class);

        DiscountService discountService = ac.getBean(DiscountService.class);
        Member member = new Member(1L, "userA", Grade.VIP);
        int discountPrice = discountService.discount(member,10000,"fixDiscountPolicy");

        assertThat(discountService).isInstanceOf(DiscountService.class);
        assertThat(discountPrice).isEqualTo(1000);

        int rateDiscountPrice= discountService.discount(member,20000,"rateDiscountPolicy");
        assertThat(rateDiscountPrice).isEqualTo(2000);

    }

빈등록하고 assertThat()을 해보면?

Map과 List 모두 fixDiscountPolicy와 rateDiscountPolicy 가 잘 담겨져있죠?

이게 끝임 뭐없더라.. 그냥 그렇다구요..

싱겁게 자료구조 이용하는거라 나도 당황 😅