Callable

takServiceStatus = takService.submit(new Callable<Void>() {
public Void call() throws Exception {
Callable<T> task;
try {
while (!canceled.get()) {
task = takQueue.take();
if (task == endTask) {
resultQ.put(endResult);
break;
}
Future<T> result = service.submit(task);
resultQ.put(result);
}
} catch (Exception e) {
throw e;
}
return null;
}
});


resultServiceStatus = resultSvc.submit(new Callable<Void>() {
public Void call() throws Exception {
try {
while (!canceled.get()) {
Future<T> resultFuture = resultQ.take();
if (resultFuture == endResult) {
break;
}
T result = resultFuture.get();
resultLsn.accept(result);
}
resultLsn.close();
} catch (Exception e) {
takServiceStatus.cancel(true);
service.shutdownNow();
throw e;
}
return null;
}
});