protected override object CreateEmptySession(IAspEnvironmentContext context, int sessionTimeout)
{
var session = new NCacheSessionData();
session.Items.Add(NCacheStatics.EmptySessionFlag, null);
return(session);
}
public async Task CommitAsync(CancellationToken cancellationToken = default(CancellationToken))
{
if (!_readonly)
{
if (IsAvailable)
{
if (EmptySession)
{
if (_isDirty)
{
SessionInitializationActions actions;
_data = _cacheStorage.GetItemExclusive(_context, _sessionId, out _locked, out _lockAge, out _lockId,
out actions) as NCacheSessionData;
_cacheStorage.SetAndReleaseItemExclusive(_context, _sessionId, _data, _lockId, _newSession,
Convert.ToInt32(_sessionTimeout.TotalMinutes));
_isDirty = false;
}
}
else
{
if (_isDirty)
{
_cacheStorage.SetAndReleaseItemExclusive(_context, _sessionId, _data, _lockId, _newSession,
Convert.ToInt32(_sessionTimeout.TotalMinutes));
_isDirty = false;
}
else
{
_cacheStorage.ReleaseItemExclusive(_context, _sessionId, _lockId);
}
}
IsAvailable = false;
}
}
}
internal NCacheSession(HttpContext context, string sessionId, ISessionStoreService cacheStorage, bool readOnly, bool newSession, int requestTimeout, TimeSpan sessionTimeout)
{
_sessionId = sessionId;
_context = context;
_data = new NCacheSessionData();
_cacheStorage = cacheStorage;
_readonly = readOnly;
_newSession = newSession;
_timeoutSpan = TimeSpan.FromSeconds(requestTimeout);
_sessionTimeout = sessionTimeout;
}
public async Task LoadAsync(CancellationToken cancellationToken = default(CancellationToken))
{
SessionInitializationActions actions;
if (_readonly)
{
_data =
_cacheStorage.GetItem(_context, _sessionId, out _locked, out _lockAge, out _lockId, out actions) as
NCacheSessionData;
}
else
{
_data =
_cacheStorage.GetItemExclusive(_context, _sessionId, out _locked, out _lockAge, out _lockId,
out actions) as NCacheSessionData;
}
if (_data == null)
{
if (_locked)
{
PollAndRetryGetItemExclusive();
}
else
{
_data = new NCacheSessionData();
NewSession = true;
}
}
if (_data != null && _data.Items.ContainsKey(NCacheStatics.EmptySessionFlag))
{
EmptySession = NewSession = true;
}
IsAvailable = true;
_isDirty = false;
}
private void PollAndRetryGetItemExclusive()
{
SessionInitializationActions actions;
if (!_readonly)
{
while (_locked && _lockAge < _timeoutSpan)
{
Thread.Sleep(500);
_data = _cacheStorage.GetItemExclusive(_context, _sessionId, out _locked, out _lockAge, out _lockId,
out actions) as NCacheSessionData;
}
if (_locked && _lockAge > _timeoutSpan)
{
_cacheStorage.ReleaseItemExclusive(_context, _sessionId, _lockId);
_data = _cacheStorage.GetItemExclusive(_context, _sessionId, out _locked, out _lockAge, out _lockId,
out actions) as NCacheSessionData;
if (_locked)
{
PollAndRetryGetItemExclusive();
}
}
}
}
protected override byte[] SerializeSession(object sessionData)
{
NCacheSessionData session = sessionData as NCacheSessionData;
return(SessionSerializer.Serialize(session));
}
