8. 회원 도메인과 리포지토리 만들기

InteliJ 단축키

 

Alt + Enter = 다른 클래스 임포트 

Alt + Insert =  생성

 

* 모든 강의를 듣고 작성을 해서 추가 된 코드가 있음.

 

회원 객체 생성 

package hello.hellospring.domain;

import javax.persistence.*;

@Entity
public class Member {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

 

 

회원 리포지토리 인터페이스

package hello.hellospring.repository;

import hello.hellospring.domain.Member;
import org.springframework.stereotype.Repository;

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

@Repository
public interface MemberRepository {

    Member save(Member member);
    Optional<Member> findById(Long id);
    Optional<Member> findByName(String name);
    List<Member> findAll();




}

 

회원 리포지토리 메모리 구현체

package hello.hellospring.repository;

import hello.hellospring.domain.Member;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import java.util.*;
/**
 * 동시성 문제가 고려되어 있지 않음, 실무에서는 ConcurrentHashMap, AtomicLong 사용 고려
 */
public class MemoryMemberRepository implements MemberRepository {
    private static Map<Long, Member> store = new HashMap<>();
    private static long sequence = 0L;
    @Override
    public Member save(Member member) {
        member.setId(++sequence);
        store.put(member.getId(), member);
        return member;
    }
    @Override
    public Optional<Member> findById(Long id) {
        return Optional.ofNullable(store.get(id));
    }
    @Override
    public List<Member> findAll() {
        return new ArrayList<>(store.values());
    }
    @Override
    public Optional<Member> findByName(String name) {
        return store.values().stream()
                .filter(member -> member.getName().equals(name))
                .findAny();
    }
    public void clearStore() {
        store.clear();
    }
}