private Core.DB.Sessions GetSessionItem(string id)
{
Core.DB.Sessions item = null;
if (_cache.TryGetValue(id, out item) && !item.IsDeleted)
{
return(item);
}
else
{
return(null);
}
}
/// <summary>
/// Создание пустой записи о новой сессии в хранилище сессий.
/// </summary>
public override void CreateUninitializedItem(HttpContext context, string id, int timeout)
{
var session = new Core.DB.Sessions
{
SessionId = id,
IdUser = 0,
Created = DateTime.UtcNow,
Expires = DateTime.UtcNow.AddMinutes(timeout),
LockDate = DateTime.UtcNow,
Locked = false,
ItemContent = null,
LockId = 0,
};
_cache[id] = session;
SaveChanges();
}
private void SaveChanges()
{
lock (_saveTaskSyncRoot)
{
if (_saveTask == null)
{
_saveTask = Task.Delay(_timeoutSave).ContinueWith(t =>
{
//lock (SyncRootSave)
{
try
{
_cache.ToList().ForEach(p =>
{
lock (p.Value.SyncRoot)
{
if (p.Value.DateLastChanged > p.Value.DateLastSaved)
{
var entityState = _dbContext.GetState(p.Value);
if (!p.Value.IsDeleted)
{
if (entityState == ItemState.Detached)
{
_dbContext.Sessions.AddOrUpdate(p.Value);
p.Value.DateLastSaved = DateTime.Now;
}
}
else if (p.Value.IsDeleted)
{
if (entityState != ItemState.Detached)
{
_dbContext.DeleteEntity(p.Value);
Core.DB.Sessions item = null;
_cache.TryRemove(p.Key, out item);
}
}
}
}
});
_dbContext.SaveChanges();
}
catch (UpdateConcurrencyException ex)
{
Debug.WriteLine("SessionStateProvider: Update error2: {0}", ex.Message);
foreach (var entry in ex.Entries)
{
Core.DB.Sessions item = entry.Entity as Core.DB.Sessions;
_dbContext.Sessions.Delete(entry.Entity as Core.DB.Sessions);
_cache.TryRemove(item.SessionId, out item);
}
}
catch (Exception ex)
{
Debug.WriteLine("SessionStateProvider: Update error: {0}", ex.Message);
}
finally
{
lock (_saveTaskSyncRoot) _saveTask = null;
}
}
});
}
}
}
