nhibernate - NHibernate CaSTLe Facility的延迟加载

Question

我是否必须关闭CaSTLe的NHibernate的ISession生成的ISessionManager？如何处理那些ISession的交易？我还是NHibernate的新手。

编辑:我想延迟加载，但收到以下消息:

Initializing[failed to lazily initialize a collection of role: , no session or session was closed"

这是我继承的通用存储库，以实现特定的实例。

[Transactional]
public class Repository<TKey, TModel>
    : IRepository<TKey, TModel>
    where TKey : IComparable
    where TModel : class
{
    private readonly ISessionManager _sessionManager;

    protected ISession Session { get { return _sessionManager.OpenSession(); } }

    public Repository(ISessionManager sessionManager)
    {
        _sessionManager = sessionManager;
    }
    #region IRepository<TKey,TModel> Members

    public virtual TModel Select(TKey key)
    {
        using (var session = _sessionManager.OpenSession())
        {
            return session.Get<TModel>(key);
        }
    }

    public virtual IList<TModel> SelectWhere(Func<TModel, bool> query)
    {
        using (var session = Session)
        {
            return session.Linq<TModel>().Where(query).ToList();
        }
    }

    public virtual TModel Single(Func<TModel, bool> query)
    {
        using (var session = Session)
        {
            return session.Linq<TModel>().SingleOrDefault(query);
        }
    }

    public virtual TModel First(Func<TModel, bool> query)
    {
        using (var session = Session)
        {
            return session.Linq<TModel>().FirstOrDefault(query);
        }
    }

    public virtual IList<TModel> All()
    {
        using (var session = Session)
        {
            return session.Linq<TModel>().ToList();
        }
    }

    [Transaction(TransactionMode.Requires)]
    public virtual void Store(TModel entity)
    {
        using (var session = Session)
        {
            session.SaveOrUpdate(entity);
        }
    }

    [Transaction(TransactionMode.Requires)]
    public virtual void Store(IEnumerable<TModel> entities)
    {
        using (var session = Session)
        {
            foreach (TModel entity in entities)
                session.SaveOrUpdate(entity);
        }
    }


    [Transaction(TransactionMode.Requires)]
    public virtual void Remove(TModel entity)
    {
        using (var session = Session)
        {
            session.Delete(entity);
        }

    }

    public virtual void Remove(Func<TModel, bool> query)
    {
        IEnumerable<TModel> entities = SelectWhere(query);
        Remove(entities);
    }

    [Transaction(TransactionMode.Requires)]
    public virtual void Remove(IEnumerable<TModel> entities)
    {
        using (var session = Session)
        {
            foreach (TModel entity in entities)
                session.Delete(entity);
        }
    }

    #endregion
}

public class Repository<TModel>
    : Repository<Guid, TModel>, IRepository<TModel>
    where TModel : class
{
    public Repository(ISessionManager sessionManager) : base(sessionManager) { }
}

public class Repository
    : Repository<ulong, object>, IRepository
{
    public Repository(ISessionManager sessionManager) : base(sessionManager) { }
}

这是该存储库的示例调用:

IUserRepository userRepository = new UserRepository(); // This is actually provided by my IoC

var users = userRepository.All();
foreach (var user in Users)
{
    foreach (var picture in user.Pictures)
    {
        // I get exceptions when I do stuff like this.
    }
}

Answer 1

是的，请始终处置ISession。参见the docs on ISessionManager usage。

对于事务，请考虑使用Automatic Transaction Facility。

SessionManager is ATM-aware因此，即使您显然已经处置了ISession，它也将在需要时巧妙地处置ISession，并将事务考虑在内。

使用ASP.NET MVC + CaSTLe自动事务处理功能+ NHibernate功能的Here's a quick & dirty sample app