Task Init(CancellationToken cancellation)
{
StreamPubSubWrapper.Hook(services, providers, stream =>
StreamSubscriptionSpecification
.Match(system, stream.Id, subscriptions.Find(stream.Provider))
.Select(x => new StreamPubSubMatch(x.Receive))
.ToArray());
return(Task.CompletedTask);
}
public IAsyncStream <T> GetStream <T>(Guid unused, string id)
{
var stream = provider.GetStream <T>(unused, id);
return((IAsyncStream <T>)streams.GetValue(stream, _ =>
{
var recipients = StreamSubscriptionSpecification.Match(system, id, specifications);
Func <T, Task> fan = item => Task.CompletedTask;
Func <IEnumerable <T>, Task> batchFan = batch => Task.CompletedTask;
if (recipients.Length > 0)
{
fan = item => Task.WhenAll(recipients.Select(x => x.Receive(item)));
batchFan = batch => Task.WhenAll(recipients.Select(x => x.Receive(batch)));
}
return new StreamVentilator <T>(stream, fan, batchFan);
}));
}