static async Task GetSyncNoWaitIterator <T>(IEnumerable <T> source, IAsyncConsumer <T> consumer)
{
foreach (T item in source)
{
consumer.YieldAsync(item);
}
}
/// <summary>
/// Consume the source async sequence by emitting items and terminal signals via
/// the given <see cref="IAsyncConsumer{T}" /> consumer.
/// </summary>
/// <typeparam name="TSource">The element type.</typeparam>
/// <param name="source">The source sequence to consume.</param>
/// <param name="consumer">The push-awaitable consumer.</param>
/// <param name="ct">The optional cancellation token to stop the consumption.</param>
/// <returns>The task that is completed when the consumption terminates.</returns>
public static ValueTask Consume <TSource>(this IAsyncEnumerable <TSource> source,
IAsyncConsumer <TSource> consumer, CancellationToken ct = default)
{
RequireNonNull(source, nameof(source));
RequireNonNull(consumer, nameof(consumer));
return(ForEach.Consume(source, consumer, ct));
}
public static async ValueTask Consume <T>(this IAsyncEnumerable <T> source, IAsyncConsumer <T> consumer, CancellationToken ct)
{
var en = source.GetAsyncEnumerator();
try
{
if (!ct.IsCancellationRequested)
{
try
{
while (await en.MoveNextAsync())
{
if (ct.IsCancellationRequested)
{
return;
}
await consumer.Next(en.Current);
}
await consumer.Complete();
}
catch (Exception ex)
{
await consumer.Error(ex);
}
}
}
finally
{
await en.DisposeAsync();
}
}
internal MulticastEnumerator(IAsyncEnumerator <TSource> source, IAsyncConsumer <TSource> subject, IAsyncEnumerator <TResult> result)
{
_source = source;
_subject = subject;
_result = result;
_disposeTask = new TaskCompletionSource <bool>();
Volatile.Write(ref _disposeWip, 2);
}
public static List <Task> FeedFast <T>(this IAsyncConsumer <T> consumer, IEnumerable <T> source)
{
List <Task> tasks = new List <Task>();
foreach (var item in source)
{
tasks.Add(consumer.YieldAsync(item));
}
return(tasks);
}
private static async Task FeedAsync <T>(this IAsyncEnumerable <T> source, IAsyncConsumer <T> consumer)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (consumer == null)
{
throw new ArgumentNullException("consumer");
}
await source.ForEachAsync(item => consumer.YieldAsync(item));
}
private static async void FillQueue <T>(IAsyncEnumerable <T> source, IAsyncConsumer <T> queue,
CancellationToken cancellationToken = default)
{
try
{
await foreach (var item in source.WithCancellation(cancellationToken))
{
await queue.Next(item);
}
}
catch (Exception e)
{
await queue.Error(e);
}
finally
{
await queue.Complete();
}
}
private Func <IMessage, Task> CreateAsyncConsumerDelegate <TIn>(IAsyncConsumer <TIn> asyncConsumer) where TIn : IMessage
{
return(async o => await asyncConsumer.HandleAsync((TIn)o).ConfigureAwait(false));
}