패스트캠퍼스 환급챌린지 7일차 : 9개 도메인 프로젝트로 끝내는 백엔드 웹 개발 (Java/Spring) 초격차 패키지 Online 강의 후기

본 포스팅은 패스트캠퍼스 환급 챌린지 참여를 위해 작성하였습니다.

 

공부 시작 시각 인증

공부 시작 시각 인증

도메인과 클린 아키텍쳐

소프트웨어 아키텍트

• 소프트웨어가 언제, 어떻게 구성돼야 할 지를 결정하는 사람, 비즈니스 목표에 부합되도록 만드는 사람

클린 아키텍쳐

• 소프트웨어 시스템의 구조를 설계할 때, 지켜야 할 원칙과 방법
• 선택지를 넓힘으로써 유연하게 대응하게 되면서 비용이 줄어 든다.
• 컴포넌트 - 시스템의 구성 요소로, 배포할 수 있는 가장 작은 단위(예: JAVA - .jar)
• 저수준 컴포넌트: 비즈니스 로직보다는 유저와 외부에 가까움.
• 고수준 컴포넌트: 비즈니스 로직에 포함됨.
• 고수준 컴포넌트는 저수준 컴포넌트에 의존해서는 안 됨! 왜냐하면, 저수준 컴포넌트는 수시로 변경되기 때문이다.

클린 아키텍쳐

수강 인증 사진

수강 인증 사진

Course.java

package org.fastcampus.student_management.domain;

import org.fastcampus.student_management.application.course.dto.*;

public class Course {
  private final Student student;
  private final String courseName;
  private CourseFee fee;
  private final DayOfWeek dayOfWeek;
  private final Long courseTime;

  public Course(Student student, CourseInfoDto courseInfo) {
    if (student == null) {
      throw new IllegalArgumentException("학생은 필수 입력값입니다.");
    }

    this.student = student;
    this.courseName = courseInfo.getCourseName();
    this.fee = new CourseFee(courseInfo.getFee());
    this.dayOfWeek = courseInfo.getDayOfWeek();
    this.courseTime = courseInfo.getCourseTime();
  }

  public void changeFee(int fee) {
    this.fee.changeFee(fee);
  }

  public String getCourseName() {
    return courseName;
  }

  public boolean isSameDay(DayOfWeek dayOfWeek) {
    return this.dayOfWeek.equals(dayOfWeek);
  }

  public boolean isActivateUser() {
    return student.isActivate();
  }

  public String getStudentName() {
    return student.getName();
  }

  public int getFee() {
    return this.fee.getFee();
  }

  public DayOfWeek getDayOfWeek() {
    return dayOfWeek;
  }

  public Long getCourseTime() {
    return courseTime;
  }
}

CourseCommandRepositoryImpl.java

package org.fastcampus.student_management.repo;

import java.util.HashMap;
import java.util.Map;
import org.fastcampus.student_management.application.course.Interface.*;
import org.fastcampus.student_management.domain.Course;

public class CourseCommandRepositoryImpl implements CourseCommandRepository {

  private final Map<String, Course> courseMap = new HashMap<>();

  public void save(Course course) {
    courseMap.put(course.getCourseName(), course);
  }
}

CourseCommandRepository.java

package org.fastcampus.student_management.application.course.Interface;

import org.fastcampus.student_management.domain.Course;

public interface CourseCommandRepository {
    void save(Course course);
}

※ 기존 CourseRepository.java 파일은 삭제됨!

CourseJdbcRepository.java

package org.fastcampus.student_management.repo;

import java.util.List;
import org.fastcampus.student_management.application.course.Interface.*;
import org.fastcampus.student_management.domain.Course;
import org.fastcampus.student_management.domain.DayOfWeek;

public class CourseJdbcRepository implements CourseQueryRepository {
    @Override
    public List<Course> getCourseDayOfWeek(DayOfWeek dayOfWeek) {
        return List.of();
    }

    @Override
    public List<Course> getCourseListByStudent(String studentName) {
        return List.of();
    }
}

CourseQueryRepository.java

package org.fastcampus.student_management.application.course.Interface;

import java.util.List;
import org.fastcampus.student_management.domain.Course;
import org.fastcampus.student_management.domain.DayOfWeek;

public interface CourseQueryRepository {
    List<Course> getCourseDayOfWeek(DayOfWeek dayOfWeek);
    List<Course> getCourseListByStudent(String studentName);
}

StudentRepository.java

package org.fastcampus.student_management.repo;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.fastcampus.student_management.domain.Student;

public class StudentRepository {

  private final Map<String, Student> studentMap = new HashMap<>();

  public void save(Student student) {
    studentMap.put(student.getName(), student);
  }

  public Optional<Student> findByName(String name) {
    return Optional.ofNullable(studentMap.get(name));
  }

  public Student getStudent(String name) {
    return findByName(name).orElseThrow(IllegalAccessError::new);
  }
}

CourseService.java

package org.fastcampus.student_management.application.course;

import java.util.List;
import org.fastcampus.student_management.application.course.Interface.*;
import org.fastcampus.student_management.application.course.dto.*;
import org.fastcampus.student_management.domain.Course;
import org.fastcampus.student_management.domain.CourseList;
import org.fastcampus.student_management.domain.DayOfWeek;
import org.fastcampus.student_management.domain.Student;
import org.fastcampus.student_management.repo.StudentRepository;

public class CourseService {
  private final CourseCommandRepository courseCommandRepository;
  private final CourseQueryRepository courseQueryRepository;
  private final StudentRepository studentRepository;

  public CourseService(CourseCommandRepository courseCommandRepository, CourseQueryRepository courseQueryRepository, StudentRepository studentRepository) {
    this.courseCommandRepository = courseCommandRepository;
    this.courseQueryRepository = courseQueryRepository;
    this.studentRepository = studentRepository;
  }

  public void registerCourse(CourseInfoDto courseInfoDto) {
    Student student = studentRepository.getStudent(courseInfoDto.getStudentName());
    Course course = new Course(student, courseInfoDto);
    courseCommandRepository.save(course);
  }

  public List<CourseInfoDto> getCourseDayOfWeek(DayOfWeek dayOfWeek) {
    // TODO: 과제 구현 부분
    List<Course> courses = courseQueryRepository.getCourseDayOfWeek(dayOfWeek);
    return courses.stream().map(CourseInfoDto::new).toList();
  }

  public void changeFee(String studentName, int fee) {
    // TODO: 과제 구현 부분
    List<Course> courses = courseQueryRepository.getCourseListByStudent(studentName);
    CourseList courseList = new CourseList(courses);
    courseList.changeAllCoursesFee(fee);
  }
}

Main.java

package org.fastcampus.student_management;

import org.fastcampus.student_management.application.course.CourseService;
import org.fastcampus.student_management.application.student.StudentService;
import org.fastcampus.student_management.repo.CourseCommandRepositoryImpl;
import org.fastcampus.student_management.repo.CourseJdbcRepository;
import org.fastcampus.student_management.repo.StudentRepository;
import org.fastcampus.student_management.ui.course.CourseController;
import org.fastcampus.student_management.ui.course.CoursePresenter;
import org.fastcampus.student_management.ui.student.StudentController;
import org.fastcampus.student_management.ui.student.StudentPresenter;
import org.fastcampus.student_management.ui.UserInputType;

public class Main {

  public static void main(String[] args) {
    StudentRepository studentRepository = new StudentRepository();
    CourseCommandRepositoryImpl courseCommandRepository = new CourseCommandRepositoryImpl();
    CourseJdbcRepository courseJdbcRepository = new CourseJdbcRepository();

    StudentService studentService = new StudentService(studentRepository);
    CourseService courseService = new CourseService(courseCommandRepository, courseJdbcRepository, studentRepository);

    CoursePresenter coursePresenter = new CoursePresenter();
    StudentPresenter studentPresenter = new StudentPresenter();

    CourseController courseController = new CourseController(coursePresenter, courseService, studentPresenter);
    StudentController studentController = new StudentController(studentPresenter, studentService);

    studentPresenter.showMenu();
    UserInputType userInputType = studentController.getUserInput();
    while (userInputType != UserInputType.EXIT) {
      switch (userInputType) {
        case NEW_STUDENT:
          studentController.registerStudent();
          break;
        case NEW_COURSE:
          courseController.registerCourse();
          break;
        case SHOW_COURSE_DAY_OF_WEEK:
          courseController.showCourseDayOfWeek();
          break;
        case ACTIVATE_STUDENT:
          studentController.activateStudent();
          break;
        case DEACTIVATE_STUDENT:
          studentController.deactivateStudent();
          break;
        case CHANGE_FEE:
          courseController.changeFee();
          break;
        default:
          studentPresenter.showErrorMessage();
          break;
      }
      studentPresenter.showMenu();
      userInputType = studentController.getUserInput();
    }
  }
}

학습 인증샷

학습 인증샷

공부 종료 시각 인증

공부 종료 시각 인증

https://bit.ly/4hTSJNB