/**
* Cancel the request. Any IO in progress will be interrupted.
*
* @param id
* @param explanation A reason to log
* @throws NoSuchElementException
*/
public synchronized void cancel(int id, @Nullable String explanation)
throws NoSuchElementException {
PrioritizedRequest request = _jobs.get(id);
if (request == null) {
throw new NoSuchElementException("Job " + id + " not found");
}
request.kill(explanation);
if (_queue.remove(request)) {
postprocessWithoutJobSlot(request);
}
}
