/// <summary>
/// Removes the block.
/// </summary>
/// <param name="block">The block.</param>
public void RemoveBlock(CacheBlock <TKey, TValue> block)
{
lock (Blocks)
{
Blocks.Remove(block.Key);
}
}
/// <summary>
/// Adds the specified key.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="value">The value.</param>
/// <returns></returns>
public CacheBlock <TKey, TValue> Add(TKey key, TValue value)
{
lock (this.Blocks)
{
if (this.Blocks.Count >= this.BlockSetCapacity)
{
this.RemoveFirst();
}
if (this.Blocks.ContainsKey(key))
{
var r = this.Blocks[key];
this.lruList.Remove(r);
//this.lruList.AddLast(r);
this.Blocks.Remove(key);
}
CacheBlock <TKey, TValue> cacheItem = new CacheBlock <TKey, TValue>(key, value);
LinkedListNode <CacheBlock <TKey, TValue> > node = new LinkedListNode <CacheBlock <TKey, TValue> >(cacheItem);
this.lruList.AddLast(node);
this.Blocks.Add(key, cacheItem);
return(cacheItem);
}
}
/// <summary>
/// Returns the value and also a flag indicating if given key is present or not and a default value if not key not found
/// </summary>
/// <param name="key">The key.</param>
/// <param name="value">The value.</param>
/// <returns></returns>
public bool TryGetValue(TKey key, out TValue value)
{
value = default(TValue);
lock (this.BlockSetsLookup)
{
CacheBlockSet <TKey, TValue> node = null;
CacheBlock <TKey, TValue> mblock = null;
foreach (var set in BlockSetsLookup.Values)
{
foreach (var block in set.Blocks)
{
if (block.Key.Equals(key))
{
node = set;
mblock = block.Value;
break;
}
}
}
if (mblock != null)
{
TValue blockvalue = default(TValue);
if (node.TryGetValue(key, out blockvalue))
{
node.TryGetValue(key, out blockvalue);
value = blockvalue;
var lrublock = this.lruList.Find(mblock);
this.lruList.Remove(lrublock);
this.lruList.AddLast(lrublock);
return(true);
}
}
value = default(TValue);
return(false);
}
}
/// <summary>
/// Adds the block set to cache.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="value">The value.</param>
/// <param name="blockSet">The block set.</param>
private void AddBlockSetToCache(TKey key, TValue value, CacheBlockSet <TKey, TValue> blockSet)
{
CacheBlock <TKey, TValue> cacheItem = null;
if (blockSet != null)
{
cacheItem = blockSet.Add(key, value);
}
var blocksets = BlockSetsLookup.Values;
if (!blocksets.Any(a => a.Blocks.Any(b => b.Key.Equals(key))))
{
BlockSetsLookup.Add(key, blockSet);
}
this.lruList.AddLast(cacheItem);
}
