Ensure that a task is interruptible

Question

How to ensure that my tasks are responsive to interruption when I call Future.cancel()?

ExecutorService         


        

Answer 1

In your task Runnable, make sure at different levels where you do a interrupt check. Something like:

while(!Thread.currentThread().isInterrupted()){
    //do something
}

If your logic in not something like loop, then check for interrupt status right before major computation like database or web-service call.

The idea here is to keep checking interrupt status as when future.cancel(true) is called, it ultimately interrupts your thread running task. This is kind of a way to know when to terminate.