/// <summary>
/// Process results from the loaders
/// Call MUST be made under a lock
/// </summary>
private void ProcessResults()
{
List <LoadResult> orderedResults;
switch (_cacheEntry.CachePolicy)
{
case CachePolicy.CacheThenRefresh:
{
orderedResults = _loadResults.Where(result => result.Loader == LoaderType.CacheLoader).ToList();
_loadResults = _loadResults.Where(result => result.Loader != LoaderType.CacheLoader).ToList();
if (!_activeLoaders.Contains(LoaderType.CacheLoader))
{
//There is no cache loader active - we can return live results
orderedResults.AddRange(_loadResults);
_loadResults = new List <LoadResult>();
}
}
break;
case CachePolicy.NoCache:
case CachePolicy.ValidCacheOnly:
case CachePolicy.AutoRefresh:
case CachePolicy.Forever:
//oder doesn't metter
orderedResults = _loadResults;
_loadResults = new List <LoadResult>();
break;
default:
throw new ArgumentOutOfRangeException();
}
if (orderedResults != null && orderedResults.Count() > 0)
{
bool errorHandlerCalled = false;
List <CompletionHandler> subscribers = new List <CompletionHandler>(_subscribers);
foreach (var loadResult in orderedResults)
{
if (loadResult.Error == null)
{
foreach (var subscriber in subscribers.Where(subscriber => subscriber.SuccessAction != null))
{
CompletionHandler localSubscriber = subscriber;
PriorityQueue.AddUiWorkItem(() => localSubscriber.SuccessAction(), false);
}
}
else
{
foreach (var subscriber in subscribers.Where(subscriber => subscriber.ErrorAction != null))
{
var localSubscriber = subscriber;
LoadResult localResult = loadResult;
PriorityQueue.AddUiWorkItem(() => localSubscriber.ErrorAction(localResult.Error), false);
errorHandlerCalled = true;
}
}
// if the error isn't handled, throw.
if (loadResult.Error != null && !errorHandlerCalled)
{
#if DEBUG
var st = _cacheEntry.LastLoadStackTrace;
_cacheEntry.LastLoadStackTrace = null;
Debug.WriteLine("{4}: FAIL loading {0} (ID={1}). Exception {2} Message={3}",
_cacheEntry.ObjectType.Name,
_cacheEntry.LoadContext.Identity,
loadResult.Error.GetType().Name,
loadResult.Error.Message,
DateTime.Now);
if (st != null)
{
Debug.WriteLine("Load initiated from:\r\n" + st);
}
#endif
if (UnhandledError != null)
{
UnhandledError(loadResult.Error);
}
}
}
if (_activeLoaders.Count == 0)
{
_subscribers = _subscribers.Except(subscribers).ToList();
}
}
}