/// <inheritdoc cref="DoWorkAsync{TResult}(IPriorityWorkQueue,IEnumerable{IAsyncWork{TResult}},int,CancellationToken,int,bool)" />
public static async IAsyncEnumerable <TResult> DoWorkAsync <TResult>(this IPriorityWorkQueue queue, IAsyncEnumerable <IAsyncWork <TResult> > works,
int priority = 0, [EnumeratorCancellation] CancellationToken cancellation = default, int attemptsCount = 1)
{
_ = queue ?? throw new ArgumentNullException(nameof(queue));
var channel = Channel.CreateUnbounded <Task <TResult> >(new UnboundedChannelOptions {
SingleReader = true, SingleWriter = true
});
var reader = channel.Reader;
var writer = channel.Writer;
_ = Task.Run(async() =>
{
try
{
await foreach (var work in works.WithCancellation(cancellation).ConfigureAwait(false))
{
await writer.WriteAsync(queue.EnqueueAsyncWork(work, priority, cancellation, attemptsCount), cancellation)
.ConfigureAwait(false);
}
}
catch (OperationCanceledException ex)
{
await writer.WriteAsync(Task.FromCanceled <TResult>(ex.CancellationToken), CancellationToken.None).ConfigureAwait(false);
}
catch (Exception ex)
{
await writer.WriteAsync(Task.FromException <TResult>(ex), cancellation).ConfigureAwait(false);
}
finally
{
writer.Complete();
}
},
cancellation);
while (await reader.WaitToReadAsync(cancellation).ConfigureAwait(false))
{
yield return(await(await reader.ReadAsync(cancellation).ConfigureAwait(false)).ConfigureAwait(false));
}
}
/// <summary> Batch process works asynchronous with giver <paramref name="priority" /> </summary>
/// <param name="queue"> Work Queue instance </param>
/// <param name="works"> Works to process </param>
/// <param name="cancellation"> Processing cancellation token </param>
/// <param name="attemptsCount"> Retry on fail attempts count </param>
/// <param name="priority"> Operation priority </param>
/// <param name="enqueueAll"> Option to enqueue all data first </param>
/// <typeparam name="TResult"> Processing result type </typeparam>
/// <returns> Processing result task enumeration </returns>
/// <exception cref="ArgumentNullException"> Thrown if <paramref name="queue" /> or <paramref name="works" /> is NULL </exception>
public static async IAsyncEnumerable <TResult> DoWorkAsync <TResult>(this IPriorityWorkQueue queue, IEnumerable <IAsyncWork <TResult> > works,
int priority = 0, [EnumeratorCancellation] CancellationToken cancellation = default, int attemptsCount = 1, bool enqueueAll = false)
{
_ = queue ?? throw new ArgumentNullException(nameof(queue));
var results = (works ?? throw new ArgumentNullException(nameof(works))).Select(work
=> queue.EnqueueAsyncWork(work, priority, cancellation, attemptsCount));
if (enqueueAll)
{
results = results.ToList();
}
foreach (var result in results)
{
yield return(await result.ConfigureAwait(false));
}
}