/// <summary>
/// Store cache item
/// </summary>
private void storeQueue_StoreReady(object sender, StoreReadyEventArgs e)
{
CacheItem cache = null;
lock (_syncObject)
{
if (_cacheStatus.ContainsKey(e.ItemKey))
{
CacheItemStatus item = _cacheStatus[e.ItemKey];
if (item.HasStored == false)
{
item.HasStored = true; //mark it as stored
cache = item.Item;
}
}
}
if (cache != null)
{
try
{
logger.Debug("Store the cache item '{0}'", cache.Key);
_storeManager.Store(cache);
}
catch (Exception ex)
{
logger.Error("Error ocurred while storing cache: {0}", ex.Message);
}
}
}
private void setItemWithPersistance(CacheItem item, int expirationSecond, bool absExpire)
{
//clean inactive items
if (_poolUsedSize + item.Content.Length >= _poolMemorySize)
{
cleanUpItems(true);
}
if (_poolUsedSize + item.Content.Length >= _poolMemorySize)
{
//store directly
_storeManager.Store(item);
return;
}
//try fetch from cache pool first
CacheItemStatus existItem;
if (_cacheStatus.TryGetValue(item.Key, out existItem))
{
#region update cache item
logger.Debug("Update the cache '{0}' in cache pool", item.Key);
_poolUsedSize += (item.Content.Length - existItem.Item.Content.Length);
//update the cache in cache pool
existItem.Item = item;
//update status //ignore the client specify expiration time
//existItem.ExpirationSecond = expirationSecond;
//existItem.AbsoluteExpire = absExpire;
existItem.LastAccessTime = _nowTime;
existItem.Hits = 0;
//reset this flag
existItem.HasStored = false;
//add item to storing queue
_storeQueue.AddItem(item.Key);
#endregion
}
else
{
#region add new cache item
logger.Debug("Add new cache '{0}' to cache pool", item.Key);
//create new status object, ignore the client specify expiration time
CacheItemStatus staus = new CacheItemStatus(
item, false, _nowTime, _persistanceItemKeepAliveTime, false); //expirationSecond, absExpire);
//add to cache pool
_cacheStatus.Add(item.Key, staus);
_poolUsedSize += item.Content.Length;
//add item to storing queue
_storeQueue.AddItem(item.Key);
#endregion
}
}
private void setItem(CacheItem item, int expirationSecond, bool absExpire)
{
//clean inactive items
if (_poolUsedSize + item.Content.Length >= _poolMemorySize)
{
cleanUpItems(true);
}
if (_poolUsedSize + item.Content.Length >= _poolMemorySize)
{
logger.Warn("Node '{0}' out of memory", _nodeId);
throw new ApplicationException("Out of memory");
}
//try fetch from cache pool first
CacheItemStatus existItem;
if (_cacheStatus.TryGetValue(item.Key, out existItem))
{
#region update cache item
logger.Debug("Update the cache '{0}' in cache pool", item.Key);
_poolUsedSize += (item.Content.Length - existItem.Item.Content.Length);
//update the cache in cache pool
existItem.Item = item;
//update status
existItem.ExpirationSecond = expirationSecond;
existItem.AbsoluteExpire = absExpire;
existItem.LastAccessTime = _nowTime;
existItem.Hits = 0;
#endregion
}
else
{
#region add new cache item
logger.Debug("Add new cache '{0}' to cache pool", item.Key);
CacheItemStatus staus = new CacheItemStatus(
item, true, _nowTime, expirationSecond, absExpire);
//add to cache pool
_cacheStatus.Add(item.Key, staus);
_poolUsedSize += item.Content.Length;
#endregion
}
}
private CacheItem getItemWithPersistance(string key)
{
//try fetch from cache pool first
CacheItemStatus existItem;
if (_cacheStatus.TryGetValue(key, out existItem))
{
#region fetch from cache pool
logger.Debug("Fetch cache item '{0}' from cache pool", key);
//update status
if (!existItem.AbsoluteExpire)
{
existItem.LastAccessTime = _nowTime;
}
if (existItem.Hits < int.MaxValue)
{
existItem.Hits++;
}
return(new CacheItem(
key, existItem.Item.Content,
existItem.Item.ItemTime, existItem.Item.Properties));
#endregion
}
else
{
#region fetch from storing
logger.Debug("Fetch cache item '{0}' from storing manager", key);
//fetch from storing
try
{
CacheItem item = _storeManager.Fetch(key);
if (_poolUsedSize + item.Content.Length >= _poolMemorySize)
{
cleanUpItems(true);
}
if (_poolUsedSize + item.Content.Length >= _poolMemorySize)
{
//return cache item directly
return(item);
}
//insert item into cache pool
CacheItemStatus status = new CacheItemStatus(
item, true, _nowTime, _persistanceItemKeepAliveTime, false);
_cacheStatus.Add(key, status);
//add used size
_poolUsedSize += item.Content.Length;
return(item);
}
catch (StoringException)
{
throw new ItemNotFoundException("Cache not found");
}
#endregion
}
}
