/**
* Returns the next task-id when available of the task that needs to be executed, it will wait for
* <tt>timeout</tt> milliseconds
*
* @param timeout milliseconds to wait.
* @return task id or -1 if failed
* @throws InterruptedException
*/
public long poll(long timeout) throws InterruptedException {
long time = System.currentTimeMillis();
try {
QueueItem item = dq.take(timeout);
time = System.currentTimeMillis() - time;
if (item != null) {
LOG.debug("found: {} in {}ms", item.getId(), time);
return item.getId();
}
} catch (KeeperException e) {
LOG.error("failed to poll item", e);
} catch (IOException e) {
LOG.error("failed to poll item", e);
}
return -1;
}
