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 void Purge <TResult>(Expression <Func <T, TResult> > expression)
{
var methodInfo = SymbolExtensions.GetMethodInfo(expression);
var parameters = SymbolExtensions.GetParameter(expression);
var proxyExpression = new ProxyRequest <T, TResult>(methodInfo, parameters);
var hash = proxyExpression.CreateHash();
_client.Remove(hash);
}
public bool TryGetRaw <TResult>(ProxyRequest <T, TResult> proxyRequest, out object result)
{
var key = proxyRequest.CreateHash();
object value;
if (_client.TryGet(key, out value))
{
var cachedObject = value as MemcachedObject <TResult>;
if (cachedObject != null)
{
result = cachedObject;
return(true);
}
}
result = null;
return(false);
}
public void StoreItem <TResult>(ProxyRequest <T, TResult> proxyRequest, CachePolicy cachePolicy, TResult item)
{
var key = proxyRequest.CreateHash();
var cachedObject = new MemcachedObject <TResult>()
{
Created = DateTime.Now,
Object = item
};
if (cachePolicy.MaxAge > 0)
{
_client.Store(StoreMode.Set, key, cachedObject, TimeSpan.FromSeconds(cachePolicy.MaxAge));
}
else
{
_client.Store(StoreMode.Set, key, cachedObject);
}
}
public void StoreException <TResult>(ProxyRequest <T, TResult> proxyRequest, CachePolicy cachePolicy, Exception exception)
{
var key = proxyRequest.CreateHash();
var cachedObject = new MemcachedObject <TResult>()
{
Created = DateTime.Now,
IsException = true,
Exception = exception,
};
if (cachePolicy.MaxAge > 0)
{
_client.Store(StoreMode.Set, key, cachedObject, TimeSpan.FromSeconds(cachePolicy.MaxAge));
}
else
{
_client.Store(StoreMode.Set, key, cachedObject);
}
}
