Parallel ForEach wait 500 ms before spawning

Question

I have this situation:

var tasks = new List<ITask> ...
Parallel.ForEach(tasks, currentTask => currentTask.Execute() );

Is it possible to instruct PLinq to wait for 500ms before the next thread is spawned?

System.Threading.Thread.Sleep(5000);

Answer 1

You are using Parallel.Foreach totally wrong, You should make a special Enumerator that rate limits itself to getting data once every 500 ms.

I made some assumptions on how your DTO works due to you not providing any details.

private IEnumerator<SomeResource> GetRateLimitedResource()
{
    SomeResource someResource = null;
    do
    {
        someResource = _remoteProvider.GetData();

        if(someResource != null)
        {
             yield return someResource;
             Thread.Sleep(500);
        }
    } while (someResource != null);
}

here is how your paralell should look then

Parallel.ForEach(GetRateLimitedResource(), SomeFunctionToProcessSomeResource);