Situation

I have a Runnable. I have a class that schedules this Runnable for execution using a ScheduledExecutorService with scheduleWithFixedDelay.

Goal

I want to alter this class to schedule the Runnable for fixed delay execution either indefinitely, or until it has been run a certain number of times, depending on some parameter that is passed in to the constructor.

If possible, I would like to use the same Runnable, as it is conceptually the same thing that should be "run".

Possible approaches

Approach #1

Have two Runnables, one that cancels the schedule after a number of executions (which it keeps a count of) and one that doesn't:

public class MyClass{
    private ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();

    public enum Mode{
        INDEFINITE, FIXED_NO_OF_TIMES
    }

    public MyClass(Mode mode){
        if(mode == Mode.INDEFINITE){
            scheduler.scheduleWithFixedDelay(new DoSomethingTask(), 0, 100, TimeUnit.MILLISECONDS);
        }else if(mode == Mode.FIXED_NO_OF_TIMES){
            scheduler.scheduleWithFixedDelay(new DoSomethingNTimesTask(), 0, 100, TimeUnit.MILLISECONDS);
        }
    }

    private class DoSomethingTask implements Runnable{
        @Override
        public void run(){
            doSomething();
        }
    }

    private class DoSomethingNTimesTask implements Runnable{
        private int count = 0;

        @Override
        public void run(){
            doSomething();
            count++;
            if(count > 42){
                // Cancel the scheduling.
                // Can you do this inside the run method, presumably using
                // the Fu
java scheduling scheduled-tasks
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