[spring] API 개발 고급 준비

API 개발 고급 - 준비

등록이랑 수정은 성능 문제가 거의 발생하지 않는다.
단순한 조회이기 때문에

문제는 조회가 문제이다.

조회용 샘플 데이터 입력을 하고 서버 내렸다 올려도 남아있도록 한다

조회용 샘플 데이터 입력

총 두건의 주문을 넣는것임

@Component로 스프링이 Component스캔대상으로 만들고

스프링빈 다 엮이고 나서 마지막에 @PostConstruct가 호출

package jpabook.jpashop;

import jpabook.jpashop.domain.*;
import jpabook.jpashop.domain.item.Book;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.PostConstruct;
import javax.persistence.EntityManager;
/*
총 주문 2개
* userA
JPA1 BOOK
JPA2 BOOK
userB
SPRING1 BOOK
SPRING2 BOOK
* */
@Component
@RequiredArgsConstructor
public class InitDb {
    private final InitService initService;

    @PostConstruct
    public  void init() {
        initService.dbInit1();
        initService.dbInit2();
    }

    @Component
    @Transactional
    @RequiredArgsConstructor
    static class InitService {

        private final EntityManager em;
        public void dbInit1() {
            Member member = new Member();
            member.setName("userA");
            member.setAddress(new Address("서울", "1", "1111"));
            em.persist(member);

            Book book1 = new Book();
            book1.setName("JPA1 BOOK");
            book1.setPrice(10000);
            book1.setStockQuantity(100);
            em.persist(book1);

            Book book2 = new Book();
            book2.setName("JPA2 BOOK");
            book2.setPrice(20000);
            book2.setStockQuantity(100);
            em.persist(book2);

            OrderItem orderItem1 = OrderItem.createOrderItem(book1, 10000, 1);
            OrderItem orderItem2 = OrderItem.createOrderItem(book2, 20000, 2);

            Delivery delivery = new Delivery();
            delivery.setAddress(member.getAddress());
            Order order = Order.createOrder(member, delivery, orderItem1, orderItem2);
            em.persist(order);

        }
    }
}

application.yml에 ddl-auto: create 로 변경했음

샘플데이터 잘 들어가있음

package jpabook.jpashop;

import jpabook.jpashop.domain.*;
import jpabook.jpashop.domain.item.Book;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.PostConstruct;
import javax.persistence.EntityManager;
/*
총 주문 2개
* userA
JPA1 BOOK
JPA2 BOOK
userB
SPRING1 BOOK
SPRING2 BOOK
* */
@Component
@RequiredArgsConstructor
public class InitDb {
    private final InitService initService;

    @PostConstruct
    public  void init() {
        initService.dbInit1();
    }

    @Component
    @Transactional
    @RequiredArgsConstructor
    static class InitService {

        private final EntityManager em;
        public void dbInit1() {
            Member member = createMember("userA", "서울", "1", "1111");
            em.persist(member);

            Book book1 = createBook("JPA1 BOOK", 10000, 100);
            em.persist(book1);
            Book book2 = createBook("JPA2 BOOK", 20000, 100);
            em.persist(book2);

            OrderItem orderItem1 = OrderItem.createOrderItem(book1, 10000, 1);
            OrderItem orderItem2 = OrderItem.createOrderItem(book2, 20000, 2);

            //Delivery delivery = new Delivery();
            //delivery.setAddress(member.getAddress());
            //Order order = Order.createOrder(member, delivery, orderItem1, orderItem2);
            Order order = Order.createOrder(member, createDelivery(member),
                    orderItem1, orderItem2);
            em.persist(order);

        }

        public void dbInit2() {
            Member member = createMember("userB", "진주", "2", "2222");
            em.persist(member);
            Book book1 = createBook("SPRING1 BOOK", 20000, 200);
            em.persist(book1);
            Book book2 = createBook("SPRING2 BOOK", 40000, 300);
            em.persist(book2);
            Delivery delivery = createDelivery(member);
            OrderItem orderItem1 = OrderItem.createOrderItem(book1, 20000, 3);
            OrderItem orderItem2 = OrderItem.createOrderItem(book2, 40000, 4);
            Order order = Order.createOrder(member, delivery, orderItem1,
                    orderItem2);
            em.persist(order);
        }

        private Member createMember(String name, String city, String street, String zipcode) {
            Member member = new Member();
            member.setName(name);
            member.setAddress(new Address(city, street, zipcode));
            return member;
        }

        private Book createBook(String name, int price, int stockQuantity) {
            Book book = new Book();
            book.setName(name);
            book.setPrice(price);
            book.setStockQuantity(stockQuantity);
            return book;
        }

        private Delivery createDelivery(Member member) {
            Delivery delivery = new Delivery();
            delivery.setAddress(member.getAddress());
            return delivery;
        }
    }
}