/// <summary>
/// Get the specified cacheKey, dataRetriever and expiration.
/// </summary>
/// <returns>The get.</returns>
/// <param name="cacheKey">Cache key.</param>
/// <param name="dataRetriever">Data retriever.</param>
/// <param name="expiration">Expiration.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public override CacheValue <T> BaseGet <T>(string cacheKey, Func <T> dataRetriever, TimeSpan expiration)
{
ArgumentCheck.NotNullOrWhiteSpace(cacheKey, nameof(cacheKey));
ArgumentCheck.NotNegativeOrZero(expiration, nameof(expiration));
var result = BaseGet <T>(cacheKey);
if (result.HasValue)
{
return(result);
}
var flag = _memcachedClient.Store(Enyim.Caching.Memcached.StoreMode.Add, this.HandleCacheKey($"{cacheKey}_Lock"), 1, TimeSpan.FromMilliseconds(_options.LockMs));
if (!flag)
{
System.Threading.Thread.Sleep(_options.SleepMs);
return(Get(cacheKey, dataRetriever, expiration));
}
var item = dataRetriever();
if (item != null || _options.CacheNulls)
{
this.Set(cacheKey, item, expiration);
_memcachedClient.Remove(this.HandleCacheKey($"{cacheKey}_Lock"));
return(new CacheValue <T>(item, true));
}
else
{
_memcachedClient.Remove(this.HandleCacheKey($"{cacheKey}_Lock"));
return(CacheValue <T> .NoValue);
}
}
/// <summary>
/// Set the specified cacheKey, cacheValue and expiration.
/// </summary>
/// <returns>The set.</returns>
/// <param name="cacheKey">Cache key.</param>
/// <param name="cacheValue">Cache value.</param>
/// <param name="expiration">Expiration.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public void Set <T>(string cacheKey, T cacheValue, TimeSpan expiration)
{
ArgumentCheck.NotNullOrWhiteSpace(cacheKey, nameof(cacheKey));
ArgumentCheck.NotNull(cacheValue, nameof(cacheValue));
ArgumentCheck.NotNegativeOrZero(expiration, nameof(expiration));
if (MaxRdSecond > 0)
{
var addSec = new Random().Next(1, MaxRdSecond);
expiration.Add(new TimeSpan(0, 0, addSec));
}
_memcachedClient.Store(Enyim.Caching.Memcached.StoreMode.Set, this.HandleCacheKey(cacheKey), cacheValue, expiration);
}
/// <summary>
/// Get the specified cacheKey, dataRetriever and expiration.
/// </summary>
/// <returns>The get.</returns>
/// <param name="cacheKey">Cache key.</param>
/// <param name="dataRetriever">Data retriever.</param>
/// <param name="expiration">Expiration.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public override CacheValue <T> BaseGet <T>(string cacheKey, Func <T> dataRetriever, TimeSpan expiration)
{
ArgumentCheck.NotNullOrWhiteSpace(cacheKey, nameof(cacheKey));
ArgumentCheck.NotNegativeOrZero(expiration, nameof(expiration));
if (_memcachedClient.Get(this.HandleCacheKey(cacheKey)) is T result)
{
CacheStats.OnHit();
if (_options.EnableLogging)
{
_logger?.LogInformation($"Cache Hit : cachekey = {cacheKey}");
}
return(new CacheValue <T>(result, true));
}
CacheStats.OnMiss();
if (_options.EnableLogging)
{
_logger?.LogInformation($"Cache Missed : cachekey = {cacheKey}");
}
var flag = _memcachedClient.Store(Enyim.Caching.Memcached.StoreMode.Add, this.HandleCacheKey($"{cacheKey}_Lock"), 1, TimeSpan.FromMilliseconds(_options.LockMs));
if (!flag)
{
System.Threading.Thread.Sleep(_options.SleepMs);
return(Get(cacheKey, dataRetriever, expiration));
}
var item = dataRetriever();
if (item != null)
{
this.Set(cacheKey, item, expiration);
_memcachedClient.Remove(this.HandleCacheKey($"{cacheKey}_Lock"));
return(new CacheValue <T>(item, true));
}
else
{
_memcachedClient.Remove(this.HandleCacheKey($"{cacheKey}_Lock"));
return(CacheValue <T> .NoValue);
}
}