Right now, my app is organized like this:
- Controller Layer: Handles user requests.
- Business Service Layer: Manages data, including caching.
- Repository Layer: Deals with data storage.
Code Example:
// Controller Layer
@RestController
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/users/{id}")
public User getUserById(@PathVariable Long id) {
return userService.getUserById(id);
}
}
// Business Service Layer
@Service
public class UserService {
@Autowired
private UserRepository userRepository;
@Cacheable(value = "users", key = "#id")
public User getUserById(Long id) {
// some business checks
return userRepository.findById(id).orElse(null);
}
}
// Repository Layer
@Repository
public interface UserRepository extends JpaRepository<User, Long> {
}
I want to introduce application level caching :
- Controller Layer: No change.
- Business Service Layer: Still handles data but now using cache manager.
- Cached Service Layer: New layer for handling cached data.
- Repository Layer: Remains the same.
Code Example:
// Controller Layer
@RestController
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/users/{id}")
public User getUserById(@PathVariable Long id) {
return userService.getUserById(id);
}
}
// Business Service Layer
@Service
public class UserService {
@Autowired
private CachedUserService cachedUserService;
public User getUserById(Long id) {
// some Business Logic
return cachedUserService.getUserById(id);
}
}
// Cached Service Layer
@Service
public class CachedUserService {
@Autowired
private UserRepository userRepository;
@Autowired
private CacheManager cacheManager;
public User getUserById(Long id) {
Cache cache = cacheManager.getCache("users");
ValueWrapper result = cache.get(id);
if (result != null) {
return (User) result.get();
} else {
User user = userRepository.findById(id).orElse(null);
cache.put(id, user);
return user;
}
}
}
// Repository Layer
@Repository
public interface UserRepository extends JpaRepository<User, Long> {
}
Is this a good way to update my app's structure, or are there any potential problems or better approaches I should consider? Your advice would be really helpful. Thanks!
