How do I implement hexagonal/clean architecture in C++?

In implementing hexagonal or clean architecture in C++, it's important to separate your code into different layers. This architecture emphasizes the independence of different components, making it easier to maintain and test. Below is a simplified approach to achieve hexagonal architecture in C++.

Example Implementation


        // Domain Layer
        class User {
        public:
            User(std::string name) : name(name) {}
            std::string getName() const { return name; }
        private:
            std::string name;
        };

        // Repository Interface (Ports)
        class UserRepository {
        public:
            virtual ~UserRepository() {}
            virtual void save(const User& user) = 0;
            virtual User findById(int id) = 0;
        };

        // Adapter Implementation (Secondary)
        class InMemoryUserRepository : public UserRepository {
        public:
            void save(const User& user) override {
                users[user.getId()] = user;
            }
            User findById(int id) override {
                return users[id];
            }
        private:
            std::unordered_map users;
        };

        // Application Layer
        class UserService {
        public:
            UserService(UserRepository& userRepo) : userRepo(userRepo) {}
            void registerUser(std::string name) {
                User user(name);
                userRepo.save(user);
            }
        private:
            UserRepository& userRepo;
        };

        // Main Function
        int main() {
            InMemoryUserRepository repo;
            UserService userService(repo);
            userService.registerUser("John Doe");
            return 0;
        }

How do I implement hexagonal/clean architecture in C++?

Example Implementation

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How do I implement hexagonal/clean architecture in C++?

Example Implementation

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