future Questions
3
Solved
What is the best approach to wrap java 7 futures inside a kotlin suspend function?
Is there a way to convert a method returning Java 7 futures into a suspending function?
The process is pretty s...
Lundin asked 11/6, 2018 at 8:27
2
Solved
The message below is being printed while setting the result of an asyncio future.
Executing <Handle <TaskWakeupMethWrapper object at 0x7fc3435141f8>(<Future finis...ection.py:260>)...
Plexiform asked 24/11, 2017 at 15:37
0
In the description of the std::async it is said that:
If the std::future obtained from std::async is not moved from or bound
to a reference, the destructor of the std::future will block at the
end...
Trichiasis asked 12/8, 2020 at 22:7
3
There are two approaches to submitting and polling task for result
FutureTask futureTask = new FutureTask<String>(callable);
Use combination of Callable and Future and submit on ExecutorS...
Scribe asked 22/6, 2015 at 9:53
3
I have a list of futures. The problem is that I have a lot of files and I need to make some long operation after every file will be created. That's why I want to make a callback after each "file sa...
Catanddog asked 22/2, 2017 at 14:18
1
Solved
I'm trying to concurrently run a function on each file in a directory. Sadly whenever I use Futures my program doesn't want to terminate (runs forever). I have tried using Await.result() with the s...
Proliferate asked 13/7, 2020 at 21:14
4
Solved
When using an ExecutorService and Future objects (when submitting Runnable tasks), if I specify a timeout value to the future's get function, does the underlying thread get killed when a TimeoutExc...
Town asked 26/4, 2013 at 8:1
1
I have tasks that are executed inside a threadpool that share a reentrant read write lock. these tasks return futures if there execution finishes. The reentrant read write lock will wait on a condi...
Disconnection asked 16/10, 2019 at 9:58
4
Solved
How large is Scala's thread pool for futures?
My Scala application makes many millions of future {}s and I wonder if there is anything I can do to optimize them by configuring a thread pool.
Than...
Anticathode asked 8/3, 2013 at 1:41
2
Solved
I have a struct Test I want to implement std::future::Future that would poll function:
use std::{
future::Future,
pin::Pin,
task::{Context, Poll},
};
struct Test;
impl Test {
async fn functio...
Dysgenic asked 18/4, 2020 at 19:38
6
Solved
In Scala there is a Promise class that could be used to complete a Future manually. I am looking for an alternative in C#.
I am writing a test and I want it to look it similar to this:
// var My...
Asthenosphere asked 17/8, 2016 at 12:24
3
Solved
Working with Futures in Dart, I've come across an interesting issue.
import 'dart:async';
class Egg {
String style;
Egg(this.style);
}
Future cookEggs(List<Egg> list) =>
new Future...
Eggcup asked 6/8, 2014 at 21:0
6
Solved
I was hoping code like follows would wait for both futures, but it does not.
object Fiddle {
val f1 = Future {
throw new Throwable("baaa") // emulating a future that bumped into an exception
}...
2
Solved
My Flutter project has a utility.dart file and a main.dart file. I call the functions in the main.dart file but it has problems. It always showAlert "OK", i think the problem is the the utility cla...
4
Solved
I've read the docs about map and flatMap and I understand that flatMap is used for an operation that accepts a Future parameter and returns another Future. What I don't fully understand is why I wo...
6
Solved
I'm looking for a way to convert an arbitrary length list of Futures to a Future of List. I'm using Playframework, so ultimately, what I really want is a Future[Result], but to make things simpler,...
2
Solved
use futures::{future, Future};
fn test() -> Box<dyn Future<Output = bool>> {
Box::new(future::ok::<bool>(true))
}
async fn async_fn() -> bool {
let result: bool = test()...
Dragone asked 6/3, 2020 at 9:54
3
Solved
I have the following code:
#include <iostream>
#include <future>
#include <chrono>
#include <thread>
using namespace std;
int sleep_10s()
{
this_thread::sleep_for(chrono...
2
Solved
How can I return Future<void> ?
Future<void> deleteAll(List stuff){
stuff.forEach( s => delete(s)); //How do I return Future<void> when loop and all delete Operation are fin...
Scarify asked 31/1, 2020 at 9:20
1
Solved
I'd like to be able to sleep my future for a single "frame" so that other work can happen. Is this a valid implementation of this idea?
use std::future::Future;
use std::task::{Context, Poll};
use...
Bournemouth asked 29/1, 2020 at 19:16
2
All futures may be successful eventually (and some may fail), but we want the first successful one. And want to represent that result as a future. This future will fail if all the futures in ...
3
Solved
I have a function that generates a futures::Stream based on an argument. I want to call this function multiple times and flatten the streams together. Complicating matters is the fact that I want t...
Newborn asked 11/1, 2020 at 19:14
1
Solved
Rust has async methods that can be tied to Abortable futures. The documentation says that, when aborted:
the future will complete immediately without making any further progress.
Will the vari...
Adz asked 6/1, 2020 at 14:25
1
Solved
How do I solve the error "thread 'main' panicked at 'no current reactor'"?
I am trying to connect to a database:
extern crate tokio; // 0.2.6, features = ["full"]
extern crate tokio_postgres; // 0.5.1
use futures::executor;
use tokio_postgres::NoTls;
fn main() {
let f...
Plovdiv asked 3/1, 2020 at 16:56
3
Solved
I want to make some cleanup (like close db connection) after a Future is complete.
Currently I achieve it this way:
Future { ... } onComplete {
case Success(v) =>
// ...
conn.close()
case F...
Alyssaalyssum asked 25/12, 2019 at 9:46
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