Java set a callback from ExecutorService

Question

I have a fixedThreadPool that I am using to run a bunch of worker threads to achieve parallel execution of a task with many components.

When all threads have finishe

Answer 1

If using Google Guava is an option, you could utilize the ListenableFuture interface in the following manner:

1. Convert an ExecutorService to a ListeningExecutorService via MoreExecutors.listeningDecorator(existingExecutorService)
2. The submit(Callable) method of ListeningExecutorService has been narrowed to return a ListenableFuture, which is a subinterface of Future.
3. ListenableFuture has an addListener() method so you can register a callback to be run when the future is completed.