should be able to abort running jobs

[rkiddy]

I cannot do this now. I will need to be able to either identify the thread running the task and kill it, or I need the Future object that the submit() method of the Executor provided, which I can use to kill the task.

I need the ability to track the Future objects for other reasons, so that will probably be best.

[rkiddy]

I am finding the last instance of the running task and marking the endTime for it. This clears the problem if a task crashes. It does not, however, actually shut down the task. For that, I would have to kill the thread.

This is possible, so I will leave this issue to cover that work.