How to check when an executor has finished running a particular Runnable

Question

I was looking for a way to wait and be notified when a particular Runnable has finished executing within an executor.

I found a FutureTask that has a method get, however, this returns a value. My program does not expect a return value; is there any data structure similar to FutureTask without needing to return a value? Almost like a FutureRunnable?

Thanks!

Answer 1

Maybe this method is what you need.

The FutureTask is returned by the Executor when you submit a Runnable.

Exemple:

public class MyTask implements Runnable
{
    @Override
    public void run()
    {
        ...
    }
}

ExecutorService s = Executors.newSingleThreadExecutor();
Future<?> submit = s.submit(new Task());