중재자패턴 2부 패턴적용하기

2022-07-11-중재자패턴-2부-패턴적용하기

목차

01.중재자패턴 적용하기

01.1 FrontDesk

01.2 CleaningService

01.3 Guest

02.저녁을 추가하는 상황

02.1 Restaurant

02.2 FrontDesk

02.3 Guest

01.중재자패턴 적용하기

01.1 FrontDesk

import java.time.LocalDateTime;

public class FrontDesk {

    private CleaningService cleaningService = new CleaningService();

    public void getTowers(Guest guest, int numberOfTowers) {
        cleaningService.getTowers(guest.getId(), numberOfTowers);
    }

    public String getRoomNumberFor(Integer guestId) {
        return "1111";
    }

    public void dinner(Guest guest, LocalDateTime dateTime) {
        restaurant.dinner(guest.getId(), dateTime);
    }
}

• Mediater이기 때문에 college를 다 알고 있어야함
• 이거 넘길때 그냥 게스트 전체를 넘기면 안되고 , 필요한 정보만 넘겨야함

01.2 CleaningService

• before

  public class CleaningService {
    public void clean(Gym gym) {
        System.out.println("clean " + gym);
    }
  
    public void getTower(Guest guest, int numberOfTower) {
        System.out.println(numberOfTower + " towers to " + guest);
    }
  
    public void clean(Restaurant restaurant) {
        System.out.println("clean " + restaurant);
    }
  }

• after

  public class CleaningService {
  
    private FrontDesk frontDesk = new FrontDesk();
  
    public void getTowers(Integer guestId, int numberOfTowers) {
        String roomNumber = this.frontDesk.getRoomNumberFor(guestId);
        System.out.println("provide " + numberOfTowers + " to " + roomNumber);
    }
  }

• 룸넘버가 필요하면 FrontDesk에서 가져올 수 있게 선언하면됨

01.3 Guest

• before

  public class Guest {
  
    private Restaurant restaurant = new Restaurant();
  
    private CleaningService cleaningService = new CleaningService();
  
    public void dinner() {
        restaurant.dinner(this);
    }
  
    public void getTower(int numberOfTower) {
        cleaningService.getTower(this, numberOfTower);
    }
  
  }

• after

  import java.time.LocalDateTime;
  
  public class Guest {
  
    private Integer id;
  
    private FrontDesk frontDesk = new FrontDesk();
  
    public void getTowers(int numberOfTowers) {
        this.frontDesk.getTowers(this, numberOfTowers);
    }
  
    public Integer getId() {
        return id;
    }
  
    public void setId(Integer id) {
        this.id = id;
    }
  }

02.저녁을 추가하는 상황

02.1 Restaurant

import java.time.LocalDateTime;

public class Restaurant {
    public void dinner(Integer id, LocalDateTime dateTime) {

    }
}

02.2 FrontDesk

• before

  import java.time.LocalDateTime;
  
  public class FrontDesk {
  
    private CleaningService cleaningService = new CleaningService();
  
    public void getTowers(Guest guest, int numberOfTowers) {
        cleaningService.getTowers(guest.getId(), numberOfTowers);
    }
  
    public String getRoomNumberFor(Integer guestId) {
        return "1111";
    }
  }

• after

  import java.time.LocalDateTime;
  
  public class FrontDesk {
  
    private CleaningService cleaningService = new CleaningService();
  
    private Restaurant restaurant = new Restaurant();
  
    public void getTowers(Guest guest, int numberOfTowers) {
        cleaningService.getTowers(guest.getId(), numberOfTowers);
    }
  
    public String getRoomNumberFor(Integer guestId) {
        return "1111";
    }
  
    public void dinner(Guest guest, LocalDateTime dateTime) {
        restaurant.dinner(guest.getId(), dateTime);
    }
  }

02.3 Guest

• before

  import java.time.LocalDateTime;
  
  public class Guest {
  
    private Integer id;
  
    private FrontDesk frontDesk = new FrontDesk();
  
    public void getTowers(int numberOfTowers) {
        this.frontDesk.getTowers(this, numberOfTowers);
    }
  
    public Integer getId() {
        return id;
    }
  
    public void setId(Integer id) {
        this.id = id;
    }
  }

• after

  import java.time.LocalDateTime;
  
  public class Guest {
  
    private Integer id;
  
    private FrontDesk frontDesk = new FrontDesk();
  
    public void getTowers(int numberOfTowers) {
        this.frontDesk.getTowers(this, numberOfTowers);
    }
  
    private void dinner(LocalDateTime dateTime) {
        this.frontDesk.dinner(this, dateTime);
    }
  
    public Integer getId() {
        return id;
    }
  
    public void setId(Integer id) {
        this.id = id;
    }
  }