@Override
public void read(
final PentoQuery query,
final Distribution distribution,
final PentoCallback handler,
final OperationContext operationContext) {
List<PentoStoreWorker> workers = readWorkerFactory.getWorkers(operationContext, distribution);
for (PentoStoreWorker worker : workers) {
Callable callable = worker.execute(query);
ListenableFuture future = ioExecutor.submit(callable);
Futures.addCallback(
future,
new FutureCallback() {
public void onSuccess(Object response) {
handler.callback(response);
}
public void onFailure(Throwable thrown) {
logger.error(thrown.getMessage());
handler.error(thrown);
}
});
}
}
/**
* Submits the task and adds a listener that adds the future to {@code queue} when it completes.
*/
@GwtIncompatible // TODO
private static <T> ListenableFuture<T> submitAndAddQueueListener(
ListeningExecutorService executorService,
Callable<T> task,
final BlockingQueue<Future<T>> queue) {
final ListenableFuture<T> future = executorService.submit(task);
future.addListener(
new Runnable() {
@Override
public void run() {
queue.add(future);
}
},
directExecutor());
return future;
}
public void close() throws Exception {
ioExecutor.shutdown();
}