OOP 회원과 주문 관리 설계

회원 가입 시스템 설계

package com.tenco.oop_sample.member;

public enum Grade {
    BASIC, VIP
}

 

 

 

Member

package com.tenco.oop_sample.member;

import lombok.ToString;

@ToString
public class Member {

    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;
    }

    public Grade getGrade() {
        return grade;
    }

    public void setGrade(Grade grade) {
        this.grade = grade;
    }

    private Long id;
    private String name;
    private Grade grade;

    public Member(Long id, String name, Grade grade){
        this.id = id;
        this.name = name;
        this.grade = grade;
    }

}

 

 

 

MemberRepository

package com.tenco.oop_sample.member.repository;

import com.tenco.oop_sample.member.Member;

public interface MemberRepository {

    void save(Member member);
    Member findById(Long memberId);

}

 

 

 

 

MemberServiceImpl

package com.tenco.oop_sample.member.service;

import com.tenco.oop_sample.member.Member;
import com.tenco.oop_sample.member.repository.MemberRepository;

public class MemberServiceImpl implements MemberService {

    private MemberRepository repository;

    // 생성자 의존 주입
    public MemberServiceImpl(MemberRepository memberRepository){
        this.repository = memberRepository;
    }

    @Override
    public void signUp(Member member) {
        repository.save(member);
    }

    @Override
    public Member findByIdMember(Long memberId) {
        return repository.findById(memberId);
    }

}

 

 

 

 

DBMemberRepositoryImpl

package com.tenco.oop_sample.member.repository;

import com.tenco.oop_sample.member.Member;

public class DBMemberRepositoryImpl implements MemberRepository{

    @Override
    public void save(Member member) {

    }

    @Override
    public Member findById(Long memberId) {
        return null;
    }

}

 

 

 

 

MainTest1

package com.tenco.oop_sample;

import com.tenco.oop_sample.member.Grade;
import com.tenco.oop_sample.member.Member;
import com.tenco.oop_sample.member.repository.MemberRepository;
import com.tenco.oop_sample.member.repository.MemoryMemberRepositoryImpl;
import com.tenco.oop_sample.member.service.MemberService;
import com.tenco.oop_sample.member.service.MemberServiceImpl;

public class MainTest1 {

    public static void main(String[] args) {
        MemberRepository memberRepository = MemoryMemberRepositoryImpl.getInstance();
        MemberService memberService = new MemberServiceImpl(memberRepository);

        // 클라이언트
        Member member = new Member(100L, "티모", Grade.VIP);

        // 신규 회원 가입 기능 요청
        memberService.signUp(member);

        // 정상적으로 메모리에 들어갔는지 확인
        System.out.println(memberService.findByIdMember(100L));
        System.out.println(memberService.findByIdMember(1L));
        System.out.println(memberService.findByIdMember(2L));
        
    }

}

 

 

 

---

 

 

 

 

FixDiscountPolicyImpl

package com.tenco.oop_sample.order;

import com.tenco.oop_sample.member.Grade;
import com.tenco.oop_sample.member.Member;

public class FixDiscountPolicyImpl implements DiscountPolicy{

    private int discountFixAmount = 1500;

    @Override
    public int discount(Member member ,int price) {
        // VIP 회원만 할인 금액 적용
        if(member.getGrade() == Grade.VIP){
            return discountFixAmount;
        }
        return 0;
    }

}

 

 

 

 

Order

package com.tenco.oop_sample.order;

public class Order {

    private Long memberId;
    private String itemName;
    private int itemPrice;
    private int discountPrice;

    public Order(Long memberId, String itemName, int itemPrice, int discountPrice) {
        this.memberId = memberId;
        this.itemName = itemName;
        this.itemPrice = itemPrice;
        this.discountPrice = discountPrice;
    }

    // 상품 금액에 할인된 가격 금액을 출력하는 기능
    public int calculateDiscount(){
        return itemPrice - discountPrice;
    }

    public Long getMemberId() {
        return memberId;
    }

    public void setMemberId(Long memberId) {
        this.memberId = memberId;
    }

    public String getItemName() {
        return itemName;
    }

    public void setItemName(String itemName) {
        this.itemName = itemName;
    }

    public int getItemPrice() {
        return itemPrice;
    }

    public void setItemPrice(int itemPrice) {
        this.itemPrice = itemPrice;
    }

    public int getDiscountPrice() {
        return discountPrice;
    }

    public void setDiscountPrice(int discountPrice) {
        this.discountPrice = discountPrice;
    }

    @Override
    public String toString() {
        return "Order [memberId=" + memberId + ", itemName=" + itemName + ", itemPrice=" + itemPrice
                + ", discountPrice=" + discountPrice + "]";
    }
    
}

 

 

 

 

PercentDiscountPolicyImpl

package com.tenco.oop_sample.order;

import com.tenco.oop_sample.member.Grade;
import com.tenco.oop_sample.member.Member;

public class PercentDiscountPolicyImpl implements DiscountPolicy{

    private double discountPercent = 10.0;

    @Override
    public int discount(Member member, int price) {
        if(member.getGrade() == Grade.VIP){
            return (int)(price * (discountPercent / 100));
        }
        return 0;
    }

}

 

 

 

 

Order

package com.tenco.oop_sample.order;

public class Order {

    private Long memberId;
    private String itemName;
    private int itemPrice;
    private int discountPrice;

    public Order(Long memberId, String itemName, int itemPrice, int discountPrice) {
        this.memberId = memberId;
        this.itemName = itemName;
        this.itemPrice = itemPrice;
        this.discountPrice = discountPrice;
    }

    // 상품 금액에 할인된 가격 금액을 출력하는 기능
    public int calculateDiscount(){
        return itemPrice - discountPrice;
    }

    public Long getMemberId() {
        return memberId;
    }

    public void setMemberId(Long memberId) {
        this.memberId = memberId;
    }

    public String getItemName() {
        return itemName;
    }

    public void setItemName(String itemName) {
        this.itemName = itemName;
    }

    public int getItemPrice() {
        return itemPrice;
    }

    public void setItemPrice(int itemPrice) {
        this.itemPrice = itemPrice;
    }

    public int getDiscountPrice() {
        return discountPrice;
    }

    public void setDiscountPrice(int discountPrice) {
        this.discountPrice = discountPrice;
    }

    @Override
    public String toString() {
        return "Order [memberId=" + memberId + ", itemName=" + itemName + ", itemPrice=" + itemPrice
                + ", discountPrice=" + discountPrice + "]";
    }
    
}

 

 

 

OrderService

package com.tenco.oop_sample.order;

public interface OrderService {

    Order createOrder(Long memberId, String itemName, int itemPrice);

}

 

 

 

OrderServiceImpl

package com.tenco.oop_sample.order;

import com.tenco.oop_sample.member.Member;
import com.tenco.oop_sample.member.repository.MemberRepository;

public class OrderServiceImpl implements OrderService{

    private final MemberRepository memberRepository;
    private final DiscountPolicy discountPolicy;

    public OrderServiceImpl(MemberRepository memberRepository, DiscountPolicy discountPolicy){
        this.memberRepository = memberRepository;
        this.discountPolicy = discountPolicy;
    }

    @Override
    public Order createOrder(Long memberId, String itemName, int itemPrice) {

        Member member = memberRepository.findById(memberId);
        int discountPrice = discountPolicy.discount(member, itemPrice);

        return new Order(memberId, itemName, itemPrice, discountPrice);
    }

}

 

 

 

 

OrderServiceTest

package com.tenco.oop_sample.order;

import com.tenco.oop_sample.member.Grade;
import com.tenco.oop_sample.member.Member;
import com.tenco.oop_sample.member.repository.MemberRepository;
import com.tenco.oop_sample.member.repository.MemoryMemberRepositoryImpl;

public class OrderServiceTest {

    public static void main(String[] args) {
        
        MemberRepository memberRepository = MemoryMemberRepositoryImpl.getInstance();
        Member member = new Member(1L, "홍길동", Grade.VIP);

        // 고정 할인 정책 테스트
        DiscountPolicy fixDiscountPolicy = new FixDiscountPolicyImpl();
        DiscountPolicy percentDiscountPolicy = new PercentDiscountPolicyImpl();

        OrderService orderService1 = new OrderServiceImpl(memberRepository, percentDiscountPolicy);
        Order order1 = orderService1.createOrder(1L, "맥북", 10000);

        System.out.println("order1 : " + order1);
        System.out.println(order1.calculateDiscount());
    }

}

 

 

 

 

AppConfig

package com.tenco.oop_sample.config;

import com.tenco.oop_sample.member.repository.MemberRepository;
import com.tenco.oop_sample.member.repository.MemoryMemberRepositoryImpl;
import com.tenco.oop_sample.member.service.MemberService;
import com.tenco.oop_sample.member.service.MemberServiceImpl;
import com.tenco.oop_sample.order.DiscountPolicy;
import com.tenco.oop_sample.order.FixDiscountPolicyImpl;
import com.tenco.oop_sample.order.OrderService;
import com.tenco.oop_sample.order.OrderServiceImpl;

public class AppConfig {

    public MemberRepository gMemberRepository(){
        return MemoryMemberRepositoryImpl.getInstance();
    }

    public MemberService getMemberService(){
        return new MemberServiceImpl(gMemberRepository());
    }

    public DiscountPolicy getDiscardPolicy(){
        // 할인 정책이 -> 고정할인
        // 변경 -> 정율 할인 빠구면 된다.
        return new FixDiscountPolicyImpl(); // 이 부분만 변경하면 된다.
        //return new PercentDiscountPolicyImpl();
    }

    public OrderService getOrderService(){
        return new OrderServiceImpl(gMemberRepository(), getDiscardPolicy());
    }
    
}

 

 

 

 

MainApp

package com.tenco.oop_sample.config;

import com.tenco.oop_sample.member.Grade;
import com.tenco.oop_sample.member.Member;
import com.tenco.oop_sample.member.service.MemberService;
import com.tenco.oop_sample.order.Order;
import com.tenco.oop_sample.order.OrderService;

public class MainApp {

    public static void main(String[] args) {
        
        AppConfig appConfig = new AppConfig();

        // 클라이언트 입장에서 코딩
        
        // 회원 가입 기능이 필요함
        MemberService memberService = appConfig.getMemberService();
        Member member = new Member(200L, "도시락", Grade.VIP);

        memberService.signUp(member); // 회원가입

        // 사용자 주문 요청
        OrderService orderService1 = appConfig.getOrderService();
        Order order1 = orderService1.createOrder(member.getId(), "아이폰16프로", 100000);
        System.out.println(order1);
        System.out.println(order1.getDiscountPrice());

    }

}