/// <summary>
/// Loads some data corresponding to the given key.
/// </summary>
/// <remarks>
/// Each requested key is collected into a batch so that they can be fetched in a single call.
/// When data for a key is loaded, it will be cached and used to fulfil any subsequent requests for the same key.
/// </remarks>
public Task <TReturn> LoadAsync(TKey key)
{
lock (_lock)
{
if (_cache.TryGetValue(key, out var task))
{
return(task);
}
_batch.Add(key);
return(_cache[key] = Completion.ContinueWith(
SelectKeyFromTaskResult
, key
, CancellationToken.None
, TaskContinuationOptions.None
, TaskScheduler.Default));
}
}
/// <summary>
/// Loads some data corresponding to the given key.
/// </summary>
/// <remarks>
/// Each requested key is collected into a batch so that they can be fetched in a single call.
/// When data for a key is loaded, it will be cached and used to fulfil any subsequent requests for the same key.
/// </remarks>
/// <returns>The future result matching the given key.</returns>
public Task <IEnumerable <TReturn> > LoadAsync(TKey key)
{
ThrowIfDisposed();
lock (_lock)
{
if (_cache.TryGetValue(key, out var task))
{
return(task);
}
_batch.Add(key);
return(_cache[key] = Completion.ContinueWith(
(t, state) => t.Result[(TKey)state]
, key
, CancellationToken.None
, TaskContinuationOptions.None
, TaskScheduler.Default));
}
}
public void Dispose()
{
Complete();
Completion.ContinueWith(t => { /* Ignore fault */ }).Wait();
}
