How can I make external methods interruptable?

Question

The Problem

I\'m running multiple invocations of some external method via an ExecutorService. I would like to be able to interrupt these methods, but unfortunately the

Answer 1

This solution isn't easy either, but it could work: Using Javassist or CGLIB, you can insert code at the beginning of each internal method (the ones presumably being called by the main run() method) to check if the thread is alive, or some other flag (if it's some other flag, you'll have to add it as well, along with a method to set it).

I'm proposing Javassist/CGLIB instead of extending the class through code because you mention it's external and you don't want to change the source code, and it may change in the future. So adding the interrupt checks at runtime will work for the current version and also in future versions even if the internal method names change (or their parameters, return values, etc). You just have to take the class and add interrupt checks at the beginning of each method that is not the run() method.