패스트캠퍼스 챌린지 23일차

Part 1. Spring Framework

 Ch 03. 예제를 만들며 이해하는 스프링 웹 어플리케이션 핵심 기술

  09. 비즈니스 벨리데이션 적용 

package com.fastcampus.programmin.dmaker.service;

import com.fastcampus.programmin.dmaker.Repository.DeveloperRepository;
import com.fastcampus.programmin.dmaker.dto.CreateDeveloper;
import com.fastcampus.programmin.dmaker.entity.Developer;
import com.fastcampus.programmin.dmaker.type.DeveloperLevel;
import com.fastcampus.programmin.dmaker.type.DeveloperSkillType;
import exception.DMakerErrorCode;
import exception.DMakerException;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import javax.persistence.EntityManager;
import javax.transaction.Transactional;
import javax.validation.Valid;

import java.util.Optional;

import static exception.DMakerErrorCode.*;


@Service
@RequiredArgsConstructor
public class dMakerService {
    private final DeveloperRepository developerRepository;
    private final EntityManager em;

    @Transactional
    public void createDeveloper(CreateDeveloper.Request request) {
        validateCreateDeveloperRequest(request);
        //business logic start
        Developer developer = Developer.builder()
                .developerLevel(DeveloperLevel.JUNIOR)
                .developerSkillType(DeveloperSkillType.FRONT_END)
                .experienceYears(2)
                .name("Olaf")
                .age(5)
                .build();

        /* A -> B 1만원 송금 */
        // A 계좌에서 1만원 줄임
        developerRepository.save(developer);
        // B 계좌에서 1만원 늘림림
        //developerRepository.delete(developer1);
    }

    private void validateCreateDeveloperRequest(CreateDeveloper.Request request) {
        DeveloperLevel developerLevel = request.getDeveloperLevel();
        Integer experienceYears = request.getExperienceYears();
        if (developerLevel == DeveloperLevel.SENIOR
                && experienceYears < 10) {
            throw new DMakerException(LEVEL_EXPERIENCE_YEARS_NOT_MATCHED);
        }
        if (developerLevel == DeveloperLevel.JUNGNior
                && (experienceYears < 4 || experienceYears > 10))
            throw new DMakerException(LEVEL_EXPERIENCE_YEARS_NOT_MATCHED);
        if (developerLevel == DeveloperLevel.JUNIOR && experienceYears > 4)
            throw new DMakerException(LEVEL_EXPERIENCE_YEARS_NOT_MATCHED);

        developerRepository.findByMemberId(request.getMemberId())
                .ifPresent((developer -> {
            throw new DMakerException(DUPLICATED_MEMBER_ID);
    }));
}
}

<DMakerService.java>

package com.fastcampus.programmin.dmaker.Repository;

import com.fastcampus.programmin.dmaker.entity.Developer;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import java.util.Optional;

@Repository
public interface DeveloperRepository
        extends JpaRepository<Developer, Long> {

    Optional<Developer> findByMemberId(String memberId);
}

<DeveloperRepository.java>

package exception;

import lombok.Getter;

@Getter
public class DMakerException extends RuntimeException {
    private DMakerErrorCode dMakerErrorCode;
    private String detailMessage;

    public DMakerException(DMakerErrorCode errorCode) {
        super(errorCode.getMessage());
        this.dMakerErrorCode = errorCode;
        this.detailMessage = errorCode.getMessage();
    }

    public DMakerException(DMakerErrorCode errorCode, String detailMessage) {
        super(detailMessage);
        this.dMakerErrorCode = errorCode;
        this.detailMessage = detailMessage;
    }

}

<DMakerException.java>

package exception;

import lombok.AllArgsConstructor;
import lombok.Getter;

@AllArgsConstructor
@Getter
public enum DMakerErrorCode {
    NO_DEVELOPER("해당되는 개발자가 없습니다."),
    DUPLICATED_MEMBER_ID("MemberId가 중복되는 개발자가 있습니다."),
    LEVEL_EXPERIENCE_YEARS_NOT_MATCHED("개발자 레벨과 연차가 맞지 않습니다."),

    INTERNAL_SERVER_ERROR("서버에 오류가 발상했습니다."),
    INVALID_REQUEST("잘못된 요청입니다.");

    private final String message;
}

<DMakerErrorCode.java>

 

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