我是论坛和编程“世界”的新手。我在使用 SignalR Web 技术创建游戏时遇到了一个问题，它表示为通过 UI-a 的多个请求访问数据库（使用 EF）。使用存储库模式的最佳解决方案是什么？在这个阶段对我的决定是在每个访问数据库的方法中添加 Lock {} 结构。如何避免阻塞对服务器的请求？
public interface IRepository<T> where T : class
{
IQueryable<T> GetAll();
T GetById(object id);
void Add(T item);
void Update(T item);
void Delete(T item);
void Delete(object id);
}
public class DBRepository<T> : IRepository<T> where T : class
{
private DbContext DbContext;
private DbSet<T> Entities
{
get
{
return this.DbContext.Set<T>();
}
}
public DBRepository(DbContext context)
{
this.DbContext = context;
}
public IQueryable<T> GetAll()
{
return Entities.AsQueryable();
}
.....
public class TicTacToeContext : DbContext
{
public DbSet<Game> Games { get; set; }
public DbSet<Guess> Guesses { get; set; }
public DbSet<Message> Messages { get; set; }
public DbSet<MessageState> MessageStates { get; set; }
public DbSet<MessageType> MessageTypes { get; set; }
public DbSet<User> Users { get; set; }
public TicTacToeContext()
: base("TicTacToeDb")
{
}
public interface IGameService
{
void CreateGame(CreateGameModel gameModel);
void JoinGame(JoinGameModel gameModel);
...
public abstract class BaseService
{
public IRepository<User> UserRepository;
public IRepository<Game> GameRepository;
...
public class GameService : BaseService, IGameService
{
public GameService(IRepository<Game> gameRepositort, IRepository<User> userRepository, ISessionService sessionService)
{
this.UserRepository = userRepository;
this.GameRepository = gameRepositort;
}
public void CreateGame(CreateGameModel gameModel)
{
....
}
public class TicTacToeHub : Hub
{
IUserService UserServise;
IGameService GameServise;
private static object _syncRoot = new object();
public TicTacToeHub(IUserService userService, IGameService gameService)
{
this.UserServise = userService;
this.GameServise = gameService;
}
.....
public void ReturnOpenGamesToClient(string sessionKey)
{
IEnumerable<GameModel> openGames;
lock (_syncRoot)
{
openGames = GameServise.GetOpenGames(sessionKey).ToList();
}
Clients.Caller.updateOpenGamesList(openGames);
}