public void Setup()
{
//Demonstrated use of the eviction policy
int maxCacheSize = 3;
_evictionPolicy = new MaxCacheSizeEvictionPolicy(maxCacheSize);
_cache = new SlickCache <int, string>(null, _evictionPolicy);
}
/// <summary>
/// Instantiate a new Cache based on the ICache(TKey,TValue) interface, can be instantiated with either parameter
/// </summary>
/// <param name="maxSize">Instantiate the cache using a max size eviction policy.</param>
/// /// <param name="evictionPolicy">Instantiate the cache using your chosen eviction policy.</param>
public SlickCache(int?maxSize = null, ICacheEvictionPolicy evictionPolicy = null)
{
//If maxSize has been specified and no eviction policy has been specified, then default to the max size eviction policy
_evictionPolicy = maxSize.HasValue && evictionPolicy == null ? new MaxCacheSizeEvictionPolicy(maxSize.Value) : evictionPolicy;
_leastRecentlyUsed = new Node <TKey, TValue>(null, null, default(TKey), default(TValue));
_mostRecentlyUsed = _leastRecentlyUsed;
//When the cache is constructed, it should take as an argument the maximum number of elements stored in the cache.
_cache = new Dictionary <TKey, Node <TKey, TValue> >();
}
/// <summary>
/// Creates a new directory cache
/// </summary>
/// <param name="directoryPath">The path to the directory to contain the cache. The directory will be created if it does not already exist</param>
/// <param name="cacheMaxSize">The maximum size of the cache in bytes</param>
/// <param name="cacheEvictionPolicy">The policy to use to maintain cache size</param>
/// <param name="highwaterMark">The cache size (in bytes) above which the eviction policy will be applied</param>
/// <param name="lowwaterMark">The cache size (in bytes) that the eviction policy will attempt to reduce the cache to when it runs</param>
public DirectoryCache(string directoryPath, long cacheMaxSize, ICacheEvictionPolicy cacheEvictionPolicy, long highwaterMark = 0, long lowwaterMark = 0) : base(cacheMaxSize, cacheEvictionPolicy, highwaterMark, lowwaterMark)
{
_baseDir = new DirectoryInfo(directoryPath);
if (!_baseDir.Exists) _baseDir.Create();
_normalDir = new DirectoryInfo(Path.Combine(_baseDir.FullName, "normal"));
_highDir = new DirectoryInfo(Path.Combine(_baseDir.FullName, "high"));
if (!_normalDir.Exists) _normalDir.Create();
if (!_highDir.Exists) _highDir.Create();
CacheSize = _normalDir.GetFiles().Sum(f => f.Length);
CacheSize += _highDir.GetFiles().Sum(f => f.Length);
}
/// <summary>
/// Creates a new cache instance
/// </summary>
/// <param name="cacheMaxSize">The maximum size of the cache in bytes</param>
/// <param name="cacheEvictionPolicy">The policy used to maintain cache size</param>
/// <param name="highwaterMark">The cache size at which the cache eviction policy will be run</param>
/// <param name="lowwaterMark">The size that the cache eviction policy will attempt to achieve after it has run</param>
protected AbstractCache(long cacheMaxSize, ICacheEvictionPolicy cacheEvictionPolicy, long highwaterMark = 0, long lowwaterMark = 0)
{
CacheSize = 0;
_cacheMaxSize = cacheMaxSize;
_highwaterMark = (long)(highwaterMark > 0 ? highwaterMark : cacheMaxSize * 0.9);
_lowwaterMark =
(long)
(lowwaterMark > 0
? lowwaterMark
: (highwaterMark > 0 ? highwaterMark - (cacheMaxSize * 0.25) : cacheMaxSize * 0.65));
if (_lowwaterMark <= 0)
{
_lowwaterMark = highwaterMark;
}
CacheEvictionPolicy = cacheEvictionPolicy;
}
/// <summary>
/// Creates a new directory cache
/// </summary>
/// <param name="directoryPath">The path to the directory to contain the cache. The directory will be created if it does not already exist</param>
/// <param name="cacheMaxSize">The maximum size of the cache in bytes</param>
/// <param name="cacheEvictionPolicy">The policy to use to maintain cache size</param>
/// <param name="highwaterMark">The cache size (in bytes) above which the eviction policy will be applied</param>
/// <param name="lowwaterMark">The cache size (in bytes) that the eviction policy will attempt to reduce the cache to when it runs</param>
public DirectoryCache(string directoryPath, long cacheMaxSize, ICacheEvictionPolicy cacheEvictionPolicy, long highwaterMark = 0, long lowwaterMark = 0) : base(cacheMaxSize, cacheEvictionPolicy, highwaterMark, lowwaterMark)
{
_baseDir = new DirectoryInfo(directoryPath);
if (!_baseDir.Exists)
{
_baseDir.Create();
}
_normalDir = new DirectoryInfo(Path.Combine(_baseDir.FullName, "normal"));
_highDir = new DirectoryInfo(Path.Combine(_baseDir.FullName, "high"));
if (!_normalDir.Exists)
{
_normalDir.Create();
}
if (!_highDir.Exists)
{
_highDir.Create();
}
CacheSize = _normalDir.GetFiles().Sum(f => f.Length);
CacheSize += _highDir.GetFiles().Sum(f => f.Length);
}
public MemoryCacheBase(int capacity, ICacheEvictionPolicy <TKey, TValue> evictionPolicy)
{
_capacity = capacity;
_evictionPolicy = evictionPolicy;
}
/// <summary>
/// Creates a new in-memory cache
/// </summary>
/// <param name="cacheSize">The maximum size of the cache in bytes</param>
/// <param name="cacheEvictionPolicy">The eviction policy to use to maintain the cache size</param>
/// <param name="highwaterMark">The cache size (in bytes) that will trigger the cache eviction policy to run</param>
/// <param name="lowwaterMark">The cache size (in bytes) that the eviction policy will attempt to achieve when it is run</param>
public MemoryCache(long cacheSize, ICacheEvictionPolicy cacheEvictionPolicy, long highwaterMark = 0, long lowwaterMark = 0) : base(cacheSize, cacheEvictionPolicy, highwaterMark, lowwaterMark)
{
_cache = new ConcurrentDictionary <string, MemoryCacheEntry>();
CacheEvictionPolicy.Initialize(this);
}
/// <summary>
/// Creates a new in-memory cache
/// </summary>
/// <param name="cacheSize">The maximum size of the cache in bytes</param>
/// <param name="cacheEvictionPolicy">The eviction policy to use to maintain the cache size</param>
/// <param name="highwaterMark">The cache size (in bytes) that will trigger the cache eviction policy to run</param>
/// <param name="lowwaterMark">The cache size (in bytes) that the eviction policy will attempt to achieve when it is run</param>
public MemoryCache(long cacheSize, ICacheEvictionPolicy cacheEvictionPolicy, long highwaterMark = 0, long lowwaterMark = 0) : base(cacheSize, cacheEvictionPolicy, highwaterMark, lowwaterMark)
{
_cache = new ConcurrentDictionary<string, MemoryCacheEntry>();
CacheEvictionPolicy.Initialize(this);
}
