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

You could get a list of your corresponding Futures (that are created when you submit a Callable) together with its startup time.

Another task could then check every minute if there are some task running for more than a defined time and if so, invoke cancel(true) in the Future. Done futures would be removed off the list.