ASP .NET MVC 애플리케이션에서 NHibernate 이벤트 리스너로 데이터 전달

여기 내 청취자의 예가 있습니다. NHibernate Cookbook에 배치 된 것과 거의 동일합니다. HttpContext 또는 WindowsIdentity에서 사용자 이름을 가져 오는 메서드가 있습니다. 웹에서 항상 호출 할 것이라는 것을 알고 있다면 항상 HttpContext.Current를 정의해야합니다. 거기에서 원하는 정보를 얻으십시오. 그 요청에 대한 액세스 권한을 제공해야합니다.

public class EventListener : IPreInsertEventListener, IPreUpdateEventListener
{
    private readonly IStamper _stamper;

    public EventListener() : this(new Stamper()) { }

    public EventListener(IStamper stamper)
    {
        _stamper = stamper;
    }

    #region IPreInsertEventListener Members

    public bool OnPreInsert(PreInsertEvent @event)
    {
        _stamper.Insert(@event.Entity as IStampedEntity, @event.State, @event.Persister);
        return false;
    }

    #endregion

    #region IPreUpdateEventListener Members

    public bool OnPreUpdate(PreUpdateEvent @event)
    {
        _stamper.Update(@event.Entity as IStampedEntity, @event.OldState, @event.State, @event.Persister);
        return false;
    }

    #endregion
}

public interface IStamper
{
    void Insert(IStampedEntity entity, object[] state, IEntityPersister persister);
    void Update(IStampedEntity entity, object[] oldState,  object[] state, IEntityPersister persister);
}

public class Stamper : IStamper
{
    private const String CreateUser = "CreateUser";
    private const String CreateDate = "CreateDate";
    private const String LastUpdateUser = "LastUpdateUser";
    private const String LastUpdateDate = "LastUpdateDate";

    public void Insert(IStampedEntity entity, object[] state, IEntityPersister persister)
    {
        if (entity == null)
            return;

        SetCreate(entity, state, persister);
        SetChange(entity, state, persister);
    }

    public void Update(IStampedEntity entity, object[] oldState, object[] state, IEntityPersister persister)
    {
        if (entity == null)
            return;

        SetChange(entity, state, persister);
    }

    private void SetCreate(IStampedEntity entity, object[] state, IEntityPersister persister)
    {
        entity.CreateUser = GetUserName();
        SetState(persister, state, CreateUser, entity.CreateUser);
        entity.CreateDate = DateTime.UtcNow;
        SetState(persister, state, CreateDate, entity.CreateDate);            
    }

    private void SetChange(IStampedEntity entity, object[] state, IEntityPersister persister)
    {
        entity.LastUpdateUser = GetUserName();
        SetState(persister, state, LastUpdateUser, entity.LastUpdateUser);
        entity.LastUpdateDate = DateTime.UtcNow;
        SetState(persister, state, LastUpdateDate, entity.LastUpdateDate);
    }

    private void SetState(IEntityPersister persister, IList<object> state, String propertyName, object value)
    {
        var index = GetIndex(persister, propertyName);
        if (index == -1)
            return;
        state[index] = value;
    }

    private Int32 GetIndex(IEntityPersister persister, String propertyName)
    {
        return Array.IndexOf(persister.PropertyNames, propertyName);
    }

    private String GetUserName()
    {
        if (HttpContext.Current != null)
            return HttpContext.Current.User.Identity.Name;

        var windowsIdentity = WindowsIdentity.GetCurrent();
        return windowsIdentity != null ? windowsIdentity.Name : String.Empty;
    }
}