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jouana/proxy_example.cs

Last active November 26, 2020 21:48
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proxy_example.cs
public interface IHasId
{
string id { get; }
}
public class IRepository<Domain>
where Domain : IHasId {
Domain FindById(string id);
}
public class IUserRepository : IRepository<User>
where Domain : IHasId {
User FindById(string id);
}
public class RepositoryWithCacheProxy<Domain> : IRepository<Domain>
where Domain : IHasId
{
private IList<Domain> _cache;
private IRepository<Domain> _repository;
public RepositoryWithProxy(IRepository<Domain> repository) {
_cache = new List<Domain>();
_repository = repository;
}
Domain FindById(string id) {
var expected = _cache.FirstOrDefault(element => elem.id == id);
if (expected == null) {
expected = _repository.FindById(id);
}
return expected;
}
}
public UserRepository : IUserRepository, Repository<User> {
}
public UserRepositoryWithCache : IUserRepository, RepositoryWithCacheProxy {
private IUserRepository _userRepository;
UserRepositoryWithCache(IUserRepository userRepository) : base(userRepository) {
_userRepository = userRepository;
}
}
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