Async Queue Processing With Reactive Extensions

Question

There are a couple of articles on this, and I have this working...but I want to know how to set a max number of Task threads for my Observable subscriptions at once.

I h

Answer 1

If you create your "work" as IObservable with deferred execution (ie. they want do anything until subscribed to), you can use the Merge overload that accepts a number of maximum concurrent subscriptions:

ISubject synchronizedQueue = new Subject().Synchronize();

queue
    .Select(item => StartWork(item))
    .Merge(maxConcurrent: 5) // C# 4 syntax for illustrative purposes
    .Subscribe();

// To enqueue:
synchronizedQueue.OnNext(new QueueItem());