Time limit on individual threads with ExecutorService

Question

I have an ExecutorService managing a number of Callables. The tasks that the Callables run are mostly black box transformations and number crunching. Under certain condition

Answer 1

The best way for you to do this would be to introduce one more Executor. You can use a ScheduledExecutorService to cancel all long running tasks for example:

ExecutorService service = Executors.newFixedThreadPool(N);

ScheduledExecutorService canceller = Executors.newScheduledThreadPool(1);

public void executeTask(Callable c){
   final Future future = service.submit(c);
   canceller.schedule(new Runnable(){
       public void run(){
          future.cancel(true);
       }
    }, SECONDS_UNTIL_TIMEOUT, TimeUnit.SECONDS);
}