public ILoadingOperation <TResource> CreateLoadingWorkerAsync <TResource>(object owner, string uri) where TResource : class
{
ValidateInputData <TResource>(uri);
if (IsCached(uri))
{
var resource = GetCachedResource <TResource>(owner, uri);
return(LoadingOperation <TResource> .GetCompletedLoadingOperation(owner, uri, resource));
}
var worker = _workersQueue.GetExistResourceWorker <TWorker>(uri);
if (worker == null)
{
worker = CreateWorker <TResource>(uri);
_workersQueue.AddToQueue(worker);
}
var existLoadingOperation = worker.GetLoadingOperationByOwner(owner);
if (existLoadingOperation != null)
{
return(existLoadingOperation as ILoadingOperation <TResource>);
}
var loadingOperation = new LoadingOperation <TResource>(owner, uri, loadOp => { HandleLoadingCancel(worker, loadOp); });
worker.RegisterLoadingOperation(loadingOperation);
return(loadingOperation);
}
public static LoadingOperation <T> GetCompletedLoadingOperation(object owner, string uri, T loadedResource)
{
var result = new LoadingOperation <T>(owner, uri, null);
result.Resource = loadedResource;
result.IsCompleted = true;
return(result);
}
private void HandleLoadingCancel <TResource>(TWorker worker, LoadingOperation <TResource> loadingOperation)
where TResource : class
{
worker.UnregisterLoadingOperation(loadingOperation);
}
