How to terminate/destroy a user thread running in background?

Hi All!
I m using t.destroy() to stop a background running thread, as t.stop() is depricated in Java 2. I implement Runnable in the background thread. On calling t.destroy() NoSuchMethodException; don't know whats the problem there?

I still don't see any solutions to the issues with performing a Runtime.exec, or stopping a thread from the outside.
Here's my situation - I have need to make a framework that processes "work" asynchronously. Work is an abstract concept that is realized (an interface is implemented) by other classes. Work comes into the system and is persisted. A seperate mechanism gets the work and processes the work when possible.
Processing "work" is an abstract concept that is realized (interface is implemented) by other classes.
All the threading/asynchronous behavoir is in the framework.
Thus I can't control how work processing occurs within the framework. At certain points I do have to be able to interrupt the work from the outside. Thus the framework threads are busy doing "work" (defined in a class not "known" to the framework) - but the framework has to shutdown.
So I'm left with thread.stop
Yes - the framework threads are designed around a volitile "continueProcessing" flag.
Yes - some of the tasks can perform their work in piecemeal and use this flag.
No - not all the work can be done in a piecemeal way.
This whole framework is a solution to situations where multiple high-CPU, high-memory, asynchronous tasks get flooded into the app-server (we don't control the clients - they are outside this business).
So we persist the request, and have a framework polling for more work. That way even if 10000 requests hit us as the same time (it has happened); we don't get floored.
We tried sevlet and JMS processing, but those both have back-log limitations. We could poll for work, then send the request to a seperate JMS queue that terminates in a MDB but this exposes an entry point into work processing. And the whole point of this is to control the amount of processing occurring at any given time, without losing any of the requests.

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