AOP

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
import hello.hellospring.repository.MemoryMemberRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Optional;

@Transactional
public class MemberService {

    private final MemberRepository memberRepository;

    public MemberService(MemberRepository memberRepository){
        this.memberRepository = memberRepository;
    }

    // 회원가입
    public Long join(Member member){

        long start = System.currentTimeMillis();
        try {
            validateDuplicateMember(member);
            memberRepository.save(member);
            return member.getId();
        } finally{
            long finish = System.currentTimeMillis();
            long timeMs = finish - start;
            System.out.println("join = " + timeMs + "ms");
        }
    }

    private void validateDuplicateMember(Member member) {
        memberRepository.findByName(member.getName())
            .ifPresent(m -> {
                throw new IllegalStateException("이미 존재하는 회원입니다.");
        });
    }

    // 전체 회원 조회
    public List<Member> findMembers(){
        long start = System.currentTimeMillis();
        try {
            return memberRepository.findAll();
        } finally{
            long finish = System.currentTimeMillis();
            long timeMs = finish - start;
            System.out.println("findMembers " + timeMs + "ms");
        }
    }

    public Optional<Member> findOne(Long memberId){
        return memberRepository.findById(memberId);
    }
}

▶ MemberService 회원 조회 시간 측정 추가

 

 

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
import hello.hellospring.repository.MemoryMemberRepository;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.transaction.annotation.Transactional;

import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
import static org.junit.jupiter.api.Assertions.assertThrows;

@SpringBootTest
@Transactional
class MemberServiceIntegrationTest {

    @Autowired
    MemberService memberService;

    @Autowired
    MemberRepository memberRepository;

    @Test
    void 회원가입() {
        //given
        Member member = new Member();
        member.setName("hello");

        //when
        Long saveId = memberService.join(member);

        //then
        Member findMember = memberService.findOne(saveId).get();
        assertThat(member.getName()).isEqualTo(findMember.getName());
    }

    @Test
    public void 중복_회원_예외() {
        //given
        Member member1 = new Member();
        member1.setName("spring");

        Member member2 = new Member();
        member2.setName("spring");

        //when
        memberService.join(member1);

        // try-catch문 대신 사용 가능 문법
        IllegalStateException e = assertThrows(IllegalStateException.class, () -> memberService.join(member2));

        assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
    }
}

▶ MemberServiceIntegrationTest 파일의 회원가입을 실행시키면 정상 작동

 

 

▶ 8ms가 걸림을 확인