CODEWITHSUNDEEP
javamultithreadinginterruptrunnable
Zhro
Zhro

Reputation: 2614

How to tell a Runnable to throw an InterruptedException?

I'm writing a scheduler which accepts a Runnable which is either queued for synchronous or asynchronous execution.

I would like to be able to implement a SomeScheduler.interrupt(int taskId) which causes a InterruptedException() to be thrown from within the thread.

Is this possible or am I going about this all wrong?

Upvotes: 2

Views: 2922

Answers (1)

Magnus
Magnus

Reputation: 8310

Threads can be interrupted, a Runnable is just class that implements the run method.
On it's own it doesn’t belong to a thread, if you want to interrupt the execution of the runnable you need to interrupt it's calling thread.
The typical way this is done is to use an ExecutorService. When you submit a runnable or callable to the executor service it will return a Future you can then interrupt a particular task by using the Future#cancel method.
Note that simply interrupting the thread doesn’t cause InterruptedException to be thrown unless the thread is running code that checks the interrupt status and throws InterruptedException, for example the Thread#sleep method.

Upvotes: 2

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