/// <summary> /// Delete's the given item from the store. /// </summary> /// <param name="item">The item to delete</param> public abstract void Delete(CacheItemInfo item);
/// <summary> /// Write the item's data to the store. /// </summary> /// <param name="info"></param> /// <param name="data"></param> public abstract void Write(CacheItemInfo info, byte[] data);
/// <summary> /// Read the data for the given item. /// </summary> /// <param name="item">The info describing the item to read</param> /// <returns>The data in the store for the specified item.</returns> public abstract byte[] Read(CacheItemInfo item);
/// <summary>
/// Look in the store for a recent entry that we can load from.
/// </summary>
/// <returns></returns>
private bool FindCacheItem()
{
lock (this)
{
if (_cacheItemInfo == null && !_thereIsNoCacheItem)
{
_cacheItemInfo = DataManager.StoreProvider.GetLastestExpiringItem(CacheEntry.UniqueName);
}
if (_cacheItemInfo == null)
{
// flat failure.
if (!_thereIsNoCacheItem)
{
_thereIsNoCacheItem = true;
Debug.WriteLine("No cache found for {0} (ID={1})", CacheEntry.ObjectType, CacheEntry.LoadContext.Identity);
}
return false;
}
return true;
}
}
/// <summary>
/// Save the specified value back to the disk.
/// </summary>
/// <param name="uniqueName"></param>
/// <param name="data"></param>
/// <param name="updatedTime"></param>
/// <param name="expirationTime"></param>
/// <param name="isOptimized"></param>
public void Save(string uniqueName, byte[] data, DateTime updatedTime, DateTime expirationTime, bool isOptimized)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
_cacheItemInfo = new CacheItemInfo(uniqueName, updatedTime, expirationTime);
_cacheItemInfo.IsOptimized = isOptimized;
Data = null;
LoadState = DataLoadState.None;
Debug.WriteLine("Writing cache for {0} (ID={3}), IsOptimized={1}, Will expire {2}", CacheEntry.ObjectType.Name, _cacheItemInfo.IsOptimized, _cacheItemInfo.ExpirationTime, CacheEntry.LoadContext.Identity.ToString());
DataManager.StoreProvider.Write(_cacheItemInfo, data);
}
public override void Reset()
{
base.Reset();
_cacheItemInfo = null;
_thereIsNoCacheItem = false;
}
