Running a task in parallel to another task

Question

I have the following Foo class that uses FooProcessor class. So what i want to do is, while running cp1 instance process method, in parallel I want

Answer 1

The way I would implement it, in summary :

• run your different processes via an ExecutorService, for example ExecutorService executor = Executors.newFixedThreadPool(nThreads);
• store the Futures of all your tasks in a List (returned by ExecutorService#submit)
• wait for future1.get() to complete, where future1 is the future linked to cp1
• once get returns (cp1 has finished) cancel all the other futures, (or shutdownNow the executor service if you don't need the executor any longer)
• for that cancellation process to work, your cp2, cp3 etc need to implement an interruption policy that makes them stop what they are doing asap.