protected override async Task LoadAsync(AsyncCacheData <TKey, TValue> emptyData, CancellationToken token)
{
var operationCts = new CancellationTokenSource();
var combinedTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token, operationCts.Token,
_localCts.Token);
var combinedToken = combinedTokenSource.Token;
//Keep this collection with 1 element bound.
var collection = new BlockingCollection <TMap>(1);
var cachePopulatorTask = emptyData.ValueTypeCanBeMerged
? Task.Factory.StartNew(() => PopulateCacheWithMerging(emptyData, collection, combinedToken, operationCts),
combinedToken)
: Task.Factory.StartNew(
() => PopulateCacheWithoutMerging(emptyData, collection, combinedToken, operationCts),
combinedToken);
try
{
await _fetcher.FillAsync(collection, combinedToken).ConfigureAwait(false);
}
finally
{
collection.CompleteAdding();
using (operationCts)
{
using (combinedTokenSource)
{
using (collection)
{
await cachePopulatorTask.ConfigureAwait(false);
}
}
}
}
}
protected override async Task LoadAsync(AsyncCacheData <TKey, TValue> emptyData, CancellationToken token)
{
_localCts.Token.ThrowIfCancellationRequested();
using (var combinedCts = CancellationTokenSource.CreateLinkedTokenSource(_localCts.Token, token))
{
combinedCts.Token.ThrowIfCancellationRequested();
try
{
await LoadFromFileAsync(emptyData, combinedCts.Token).ConfigureAwait(false);
}
catch (Exception e)
{
_logger.Error($"({_cacheName}) Error during load from file.", e);
throw;
}
}
}
