在Go语言中实现DDD领域驱动设计实例探究

package domain

type User struct {
    ID        string
    Username  string
    Email     string
    Password  string
}

type Address struct {
    City    string
    State   string
    Country string
}

package repository

import "context"

type UserRepository interface {
    GetByID(ctx context.Context, id string) (*domain.User, error)
    Save(ctx context.Context, user *domain.User) error
}

type userRepository struct {
    db *sql.DB
}

func (r *userRepository) GetByID(ctx context.Context, id string) (*domain.User, error) {
    // 数据库查询逻辑
}

func (r *userRepository) Save(ctx context.Context, user *domain.User) error {
    // 数据库保存逻辑
}

package service

import (
    "context"
    "errors"
    "domain"
    "repository"
)

type UserService struct {
    repo repository.UserRepository
}

func (s *UserService) CreateUser(ctx context.Context, user *domain.User) error {
    if user.ID == "" {
        return errors.New("user ID is required")
    }
    return s.repo.Save(ctx, user)
}

package application

import (
    "context"
    "service"
)

type UserApplication struct {
    userService *service.UserService
}

func (a *UserApplication) RegisterUser(ctx context.Context, userData *UserData) error {
    // 注册用户逻辑
}