Throttling Events and Locking Methods

Question

Let\'s pretend I have something like this:

And something like this:

publ         


        

Answer 1

I think a simpler and reusable way to solve your problem might actually be async/await-based rather than RX-based. Check out the single threaded EventThrottler class implementation I got as an answer to my 'Is there such a synchronization tool as “single-item-sized async task buffer”?' question. With that you can rewrite your DoWork() method as simply:

private void DoWork()
{
    EventThrottler.Default.Run(async () =>
    {
        await Task.Delay(1000);
        //do other stuff
    });
}

and call it every time your text changes. No RX required. Also, if you are already using WinRT XAML Toolkit - the class is in there.

Here's a copy of the throttler class code as a quick reference:

public class EventThrottler
{
    private Func next = null;
    private bool isRunning = false;

    public async void Run(Func action)
    {
        if (isRunning)
            next = action;
        else
        {
            isRunning = true;

            try
            {
                await action();

                while (next != null)
                {
                    var nextCopy = next;
                    next = null;
                    await nextCopy();
                }
            }
            finally
            {
                isRunning = false;
            }
        }
    }

    private static Lazy defaultInstance =
        new Lazy(() => new EventThrottler());
    public static EventThrottler Default
    {
        get { return defaultInstance.Value; }
    }
}