private IMethodReturn loadUsingCache()
{
//We need to synchronize calls to the CacheHandler on method level
//to prevent duplicate calls to methods that could be cached.
lock (input.MethodBase)
{
if (TargetMethodReturnsVoid(input))
{
return(getNext()(input, getNext));
}
var inputs = new object[input.Inputs.Count];
for (int i = 0; i < inputs.Length; ++i)
{
inputs[i] = input.Inputs[i];
}
string cacheKey = keyGenerator.CreateCacheKey(input.MethodBase, inputs);
PessimisticCacheEntryStatus cacheEntryStatus;
#region Gets PessimisticCacheEntryStatus
if (!pessimisticCacheStatus.ContainsKey(cacheKey))
{
cacheEntryStatus = pessimisticCacheStatus[cacheKey] = new PessimisticCacheEntryStatus()
{
IsOperationFaulted = true
};
}
else
{
cacheEntryStatus = pessimisticCacheStatus[cacheKey];
}
#endregion Gets PessimisticCacheEntryStatus
IMethodReturn returnResult = null;
if (cacheEntryStatus.IsOperationFaulted || !cacheManager.Contains(cacheKey))
{
returnResult = TryToInvoke(cacheKey, cacheEntryStatus, returnResult);
}
else
{
returnResult = GetMethodReturnFromCache(cacheKey, input.Arguments);
}
return(returnResult);
}
}
private IMethodReturn TryToInvoke(string cacheKey, PessimisticCacheEntryStatus cacheEntryStatus, IMethodReturn returnResult)
{
returnResult = getNext()(input, getNext);
if (returnResult.Exception == null && returnResult.ReturnValue != null)
{
AddToCache(cacheKey, returnResult.ReturnValue);
cacheEntryStatus.IsOperationFaulted = false;
}
else
{
if (cacheManager.Contains(cacheKey))
{
returnResult = GetMethodReturnFromCache(cacheKey, input.Arguments);
}
}
return(returnResult);
}