Java: set timeout on a certain block of code?

Question

Is it possible to force Java to throw an Exception after some block of code runs longer than acceptable?

Answer 1

Here's the simplest way that I know of to do this:

final Runnable stuffToDo = new Thread() {   @Override    public void run() {      /* Do stuff here. */    } };  final ExecutorService executor = Executors.newSingleThreadExecutor(); final Future future = executor.submit(stuffToDo); executor.shutdown(); // This does not cancel the already-scheduled task.  try {    future.get(5, TimeUnit.MINUTES);  } catch (InterruptedException ie) {    /* Handle the interruption. Or ignore it. */  } catch (ExecutionException ee) {    /* Handle the error. Or ignore it. */  } catch (TimeoutException te) {    /* Handle the timeout. Or ignore it. */  } if (!executor.isTerminated())     executor.shutdownNow(); // If you want to stop the code that hasn't finished. 

Alternatively, you can create a TimeLimitedCodeBlock class to wrap this functionality, and then you can use it wherever you need it as follows:

new TimeLimitedCodeBlock(5, TimeUnit.MINUTES) { @Override public void codeBlock() {     // Do stuff here. }}.run();