/// <summary>
/// Fills NCache from the system ASP.NET session.
/// </summary>
/// <param name="cache"></param>
/// <param name="session"></param>
/// <param name="strict"></param>
/// <param name="async"></param>
void IDistributionStrategy.FillCacheFromSession(ISessionCache cache, HttpSessionState session, NSessionStateModule module, bool strict, bool isAbandoned)
{
if (cache == null)
{
return;
}
string sessionId = session.SessionID;
SessionKey key = new SessionKey(sessionId, module.ApplicationId);
try
{
if (session.Count == 0) //We need not to keep any empty session in the cache. (This is incomplete. As it is never used. See Monolithic strategy for detail use-case)
{
return;
}
cache.Remove(sessionId, key.ToString(), false);
cache.Insert(sessionId, key.ToString(), DateTime.Now, null, Alachisoft.NCache.Web.Caching.Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(session.Timeout), CacheItemPriority.NotRemovable);
string[] tempStrArr = new string[1];
tempStrArr[0] = key.ToString();
foreach (string skey in session.Keys)
{
cache.Insert(sessionId, SessionKey.CompositeKey(sessionId, skey), session[skey], new CacheDependency(null, tempStrArr), Alachisoft.NCache.Web.Caching.Cache.NoAbsoluteExpiration, Alachisoft.NCache.Web.Caching.Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable);
}
if (strict)
{
session.Clear();
}
}
catch (Exception exc)
{
module.RaiseExceptions(exc, "SingleValueDistribution.FillCacheFromSession");
}
}
/// <summary>
/// Fills the system ASP.NET session from NCache.
/// </summary>
/// <param name="session"></param>
/// <param name="cache"></param>
/// <param name="strict"></param>
void IDistributionStrategy.FillSessionFromCache(ISessionCache cache, HttpSessionState session, NSessionStateModule module, bool strict)
{
try
{
string sessionId = session.SessionID;
if (strict)
{
session.Clear();
}
IDictionaryEnumerator i = (IDictionaryEnumerator)cache.GetEnumerator();
while (i != null && i.MoveNext())
{
SessionKey key = i.Key as SessionKey;
if (key != null && key.SessionID == sessionId)
{
session[key.Key] = i.Value;
}
}
}
catch (Exception exc)
{
if (strict)
{
session.Clear();
}
module.RaiseExceptions(exc, "SingleValueDistribution.FillSessionFromCache");
}
}
/// <summary>
/// Fills the system ASP.NET session from NCache.
/// </summary>
/// <param name="session"></param>
/// <param name="cache"></param>
/// <param name="strict"></param>
void IDistributionStrategy.FillSessionFromCache(ISessionCache cache, HttpSessionState session, NSessionStateModule module, bool strict)
{
string sessionId = session.SessionID;
SessionKey key = new SessionKey(sessionId, module.ApplicationId);
if (strict)
{
session.Clear();
}
/// save the binary form of data, for comparision on FillCacheFromAspNet()
_table = (byte[])cache.Get(key.ToString());
if (_table == null)
{
_isNewSession = true;
return;
}
Hashtable ht = (Hashtable)CompactBinaryFormatter.FromByteBuffer(_table, module.CacheID);
if (ht == null)
{
return;
}
IDictionaryEnumerator i = ht.GetEnumerator();
while (i.MoveNext())
{
session[i.Key.ToString()] = i.Value;
}
}
/// <summary>
/// Fills NCache from the system ASP.NET session.
/// </summary>
/// <param name="cache"></param>
/// <param name="session"></param>
/// <param name="strict"></param>
/// <param name="async"></param>
void IDistributionStrategy.FillCacheFromSession(ISessionCache cache, HttpSessionState session, NSessionStateModule module, bool strict, bool isAbandoned)
{
string sessionId = session.SessionID;
SessionKey key = new SessionKey(sessionId, module.ApplicationId);
try
{
if (session.IsReadOnly && cache.Contains(sessionId, key.ToString()) && !isAbandoned)
{
return;
}
if (/*session.Count == 0 ||*/ isAbandoned)//[Ata]: Session is not removed from store if it is cleared
{
cache.Remove(sessionId, key.ToString(), false);
if (module.DetailedLogsEnabled)
{
NSessionStateModule.NCacheLog.Debug(sessionId + " :session removed from cache");
}
return;
}
//use-case: A session my get emptied while doing different updates... although whien added first time is is not empty
//So we must update that session rather doing no operation thinking it is empty session and need not to be added.
if (session.Count == 0 && _isNewSession) //We need not to keep any new empty session in the cache. [Asif Imam] April 09, 08
{
return;
}
IDictionary ht = new Hashtable();
foreach (string skey in session.Keys)
{
ht[skey] = session[skey];
}
byte[] _stable = CompactBinaryFormatter.ToByteBuffer(ht, module.CacheID);
if (_table != null)
{
if (BinaryComparer(_stable, _table))
{
return;
}
}
CacheItem sessionItem = new CacheItem(_stable);
sessionItem.Priority = CacheItemPriority.NotRemovable;
sessionItem.Expiration = new Runtime.Caching.Expiration(Runtime.Caching.ExpirationType.Sliding, TimeSpan.FromMinutes(session.Timeout));
cache.Insert(sessionId, key.ToString(), sessionItem, false);
}
finally
{
if (session != null && strict)
{
session.Clear();
}
}
}
/// <summary>
/// Fills NCache from the system ASP.NET session.
/// </summary>
/// <param name="cache"></param>
/// <param name="session"></param>
/// <param name="strict"></param>
/// <param name="async"></param>
void IDistributionStrategy.FillCacheFromSession(ISessionCache cache, HttpSessionState session, NSessionStateModule module, bool strict, bool isAbandoned)
{
string sessionId = session.SessionID;
SessionKey key = new SessionKey(sessionId, module.ApplicationId);
try
{
if (session.IsReadOnly && cache.Contains(sessionId, key.ToString()) && !isAbandoned)
{
return;
}
if (isAbandoned)// Session is not removed from store if it is cleared
{
cache.Remove(sessionId, key.ToString(), false);
if (module.DetailedLogsEnabled)
{
NSessionStateModule.NCacheLog.Debug(sessionId + " :session removed from cache");
}
return;
}
if (session.Count == 0 && _isNewSession) //We need not to keep any new empty session in the cache.
{
return;
}
IDictionary ht = new Hashtable();
foreach (string skey in session.Keys)
{
ht[skey] = session[skey];
}
byte[] _stable = CompactBinaryFormatter.ToByteBuffer(ht, module.CacheID);
if (_table != null)
{
if (BinaryComparer(_stable, _table))
{
return;
}
}
CacheItem sessionItem = new CacheItem(_stable);
sessionItem.Priority = CacheItemPriority.NotRemovable;
sessionItem.SlidingExpiration = TimeSpan.FromMinutes(session.Timeout);
cache.Insert(sessionId, key.ToString(), sessionItem, false);
}
finally
{
if (session != null && strict)
{
session.Clear();
}
}
}
