public CachedObject <TResult> GetItem <TResult>(ProxyRequest <T, TResult> proxyRequest, CachePolicy cachePolicy)
{
var key = proxyRequest.CreateHash();
object value;
if (_client.TryGet(key, out value))
{
var cachedObject = value as MemcachedObject <TResult>;
if (cachedObject == null)
{
return(new CachedObject <TResult>(CachedObjectState.None, null));
}
if (cachedObject.IsException && cachedObject.Created.AddSeconds(cachePolicy.ExceptionCacheDuration) > DateTime.Now)
{
return(new CachedObject <TResult>(CachedObjectState.Exception, cachedObject.Exception));
}
else if (cachedObject.IsException)
{
return(new CachedObject <TResult>(CachedObjectState.None, null));
}
var fresh = cachedObject.Created.AddSeconds(cachePolicy.CacheDuration) > DateTime.Now;
var state = fresh ? CachedObjectState.Fresh : CachedObjectState.Stale;
return(new CachedObject <TResult>(state, cachedObject.Object));
}
return(new CachedObject <TResult>(CachedObjectState.None, null));
}
public bool TryGet <T>(string key, out T value)
{
value = default(T);
object cached = new object();
if (cache.TryGet(key, out cached))
{
value = (T)cached;
return(true);
}
return(false);
}
public bool TryGet(string key, out object value)
{
return(_memcachedClient.TryGet(key, out value));
}
/// <summary>
/// Exists the specified cacheKey.
/// </summary>
/// <returns>The exists.</returns>
/// <param name="cacheKey">Cache key.</param>
public bool Exists(string cacheKey)
{
ArgumentCheck.NotNullOrWhiteSpace(cacheKey, nameof(cacheKey));
return(_memcachedClient.TryGet(this.HandleCacheKey(cacheKey), out object obj));
}
/// <summary>
/// 是否存在指定缓存
/// </summary>
/// <param name="cacheKey">缓存键</param>
/// <returns></returns>
public bool Exists(string cacheKey)
{
Check.NotNullOrEmpty(cacheKey, nameof(cacheKey));
return(_memcachedClient.TryGet(this.HandleCacheKey(cacheKey), out var obj));
}
