Golang Facade 모드 예시 공유: 효율적인 개발 워크플로우 생성

package main

import "fmt"

// 定义用户管理子系统
type UserManager struct{}

func (u *UserManager) Login(username, password string) {
    fmt.Printf("用户 %s 登录成功
", username)
}

func (u *UserManager) Logout(username string) {
    fmt.Printf("用户 %s 已注销
", username)
}

// 定义订单管理子系统
type OrderManager struct{}

func (o *OrderManager) CreateOrder(username, product string) {
    fmt.Printf("用户 %s 创建了一笔订单，商品：%s
", username, product)
}

func (o *OrderManager) CancelOrder(username string, orderId int64) {
    fmt.Printf("用户 %s 取消了订单 %d
", username, orderId)
}

// 定义库存管理子系统
type InventoryManager struct{}

func (i *InventoryManager) ReduceInventory(product string, quantity int) {
    fmt.Printf("减少商品 %s 库存：%d
", product, quantity)
}

// 定义外观对象
type Facade struct {
    UserManager     *UserManager
    OrderManager    *OrderManager
    InventoryManager *InventoryManager
}

func NewFacade() *Facade {
    return &Facade{
        UserManager:     &UserManager{},
        OrderManager:    &OrderManager{},
        InventoryManager: &InventoryManager{},
    }
}

// 定义业务接口，供客户端使用
type BusinessInterface interface {
    Login(username, password string)
    Logout(username string)
    CreateOrder(username, product string)
    CancelOrder(username string, orderId int64)
    ReduceInventory(product string, quantity int)
}

func (f *Facade) Login(username, password string) {
    f.UserManager.Login(username, password)
}

func (f *Facade) Logout(username string) {
    f.UserManager.Logout(username)
}

func (f *Facade) CreateOrder(username, product string) {
    f.OrderManager.CreateOrder(username, product)
}

func (f *Facade) CancelOrder(username string, orderId int64) {
    f.OrderManager.CancelOrder(username, orderId)
}

func (f *Facade) ReduceInventory(product string, quantity int) {
    f.InventoryManager.ReduceInventory(product, quantity)
}

func main() {
    facade := NewFacade()

    facade.Login("user1", "password1")
    facade.CreateOrder("user1", "product1")
    facade.ReduceInventory("product1", 1)
    facade.CancelOrder("user1", 1234)
    facade.Logout("user1")
}

用户 user1 登录成功
用户 user1 创建了一笔订单，商品：product1
减少商品 product1 库存：1
用户 user1 取消了订单 1234
用户 user1 已注销