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Questions tagged [asynchronous]

Asynchronous programming is simply allowing some portions of code to be executed on separate threads. It makes your applications perform better, be more responsive, and use the resources of the system they are running on to the fullest extent.

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41 views

C# asynchronous notification vector v2

As a result of my previous post, I have implemented / refactored my code and have started making successful use of my class. However I have come across a couple of new questions: The observer must ...
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37 views

multiple AJAX requests and multiple SetTimeout animations

multiple AJAX requests and multiple SetTimeout animations I wrote a piece of code that included multiple AJAX requests and multiple SetTimeout animations. I want the code to perform better, ...
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35 views

Node/Express authenticate Google email address

Trying to set up express server that will authenticate a user's Google email before proceeding. The code below works, but is there any way to make it more elegant? The whole ...
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0answers
69 views

Putting a Queue Between HTTP Request/Response

We currently have two legacy systems: the Consumer and the Worker. These systems are massively complex in ways that are not important to this review, but it is enough to say that a large-scale re-...
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0answers
46 views

Python server that performs sentiment analysis on Twitter data

I have a fully working Python server that utilizes Tornado, asyncio, websockets and tweepy(Twitter's Streaming api). The main point of this server is to receive a query from the user, call upon tweepy ...
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0answers
41 views

REST API request automation [closed]

I created a class to automate some requests for an API. Can I improve this code in any way? The code itself is very simple and easy to understand. ...
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1answer
82 views

C# asynchronous notification vector

The purpose of this class is to efficiently notify another thread when data is available with minimal blocking to access/pass the data. The data reader/producer thread processes data in bulk which ...
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0answers
191 views

Let Them Eat Lists, Eventually (Asynchronous Generic List Consumption with Spring and CompletableFuture)

I want to reduce some repeated code in my Java 1.8/Spring Boot application, and to that end I tried to make a reuseable asynchronous utility module. In essence its an async List.forEach that takes a ...
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1answer
115 views

Parallel FTP client

I was given the task to download files for a FTP server. The download should be fairly fast. 15 parallel connections can be used. I have used FluentFTP as the ...
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57 views

Asynchronous wrapper for database connection

I'm using a database that has a library for access to it. Connection is done synchronously, it's blocking and I do not have a way to abort it. To connect, I have to write: ...
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1answer
60 views

C# Handling Task Cancellations/Timeouts and Exceptions [closed]

I am very new to Tasks and therefore new to handling task cancellations and task exceptions. I wrote this method that gets a List which is then used to populate an ObsservableCollection shown in a ...
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0answers
27 views

Asynchronous retrieval of WebExtension browser history visits

I'm writing a small class that wraps the existing functionality of browser.history.search in Firefox's WebExtensions API. The current API only directly searches for ...
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0answers
54 views

C# Async/Await networking server

I made a simple async networking server and I'd like to get some input on the code, whether things can be done better and whether the code is stable (able to hold more than 1000 connections without ...
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0answers
154 views

Async SelectMany implementation

Async SelectMany takes an enumeration (length unknown) of tasks, each of which returns another enumeration (length unknown and likely different from one another), and returns results from the second ...
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1answer
47 views

Upload a file asynchronously

I need your opinion about my practice. I want to improve it. The requirements are the following: RESTFUL + OWIN (SelfHosted) Endpoint - Upload a file asynchronously Make a request to the endpoint ...
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0answers
57 views

Aggregate sensor readings from multiple sources

I've developed a toy example to investigate how async works in C#. Though I've learned a lot this week, I'm still unsure of the finer details, as this is my first C#...
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0answers
175 views

Downloading multiple urls with aiohttp Python 3

I am trying to use aiohttp library in python to download information from url. I have about 300 000 urls. They are saved in file "my_file.txt". When I get web page, I extract pairs of a question and ...
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1answer
52 views

Processing a company list in which every element is an employee list

Now, there is a company list in which an element is an employee list in every company. I calculate the salary of employees in every company with a RESTful API one by one,. This is very slow, so I join ...
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0answers
25 views

A syslog to Azure Log Analytics forwarder

I am using this code to forward my syslog logs (converted to json using syslog-ng) to Azure Log Analytics on an ARM board (since there is no official client for ARM)...
2
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1answer
55 views

Await socket Response

I wrote this to make the "callback hell" more manageable on the part of the coder when using Socket IO, so that there wasn't really any callback hell to go with, just a simple await. This should work ...
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0answers
155 views

Wrap location API in coroutines

In my app I need to query location and scan wifi periodically. To conserve power I need to change the rate dynamically, depending on the distance to the target. Also I want to wait for both ...
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0answers
26 views
4
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2answers
117 views

Initializing multiple variables with different types using parallel calls

Consider the pattern below, where multiple async calls are made in parallel: ...
3
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1answer
225 views

Search for rows in a 2D array that contain a given sequence

I have a 2d array of m * n dimension (m and n can vary from 1 to 100000). The following snippet of code checks if the sequence exists in the row and stores the index if it exists. The time taken by ...
3
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0answers
39 views

Templatized GLib asynchronous queue

I'm working on a legacy C++ project, which is using GLib for its Main Event Loop. This has caused a lot of ugliness because it mixes C++ and C paradigms (no C++ wrapper for GLib had been used). ...
3
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1answer
81 views

Monitor asynchronous tasks, tracking their running times

Scenario: I'm getting requests through a (thread-safe) queue. Each request then needs to be handled in a separate thread. There is a chance that the function (which is actually calling a Java-program ...
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0answers
130 views

Collecting folly::Futures with an associated value

I'm trying to implement a batch API where requests are associated with an id. In the batch response, the individual success/failure responses should be associated to their corresponding request id. ...
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2answers
40 views
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0answers
43 views

Python3.x Download(async) + Process(bs4) + Save(EPUB)

I had a simple webscraper with Beautiful Soup 4 which downloaded novel chapters from a website and converted them to an EPUB file. It was straight and simple imperative programming. Then I thought, ...
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0answers
165 views

Python (Sanic) Routing

I am new to Python and wanted to explore how I can associate routes with "controllers" with Sanic as a base. It works fine but "feels" a bit clunky but I can't put my finger on why/how. routes.py - ...
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0answers
314 views

Custom TaskScheduler: Limited concurrency level

I'm interested in some feedback for a custom TaskScheduler implementation I wrote today for use on a game server - I wanted to be able to have a single-threaded scheduler for tasks since the game is ...
2
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1answer
142 views

Retry Class in Java

I have the following Java code used to retry a certain actions/methods ...
3
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0answers
603 views

Await in… VBA?

Asynchronous programming is tricky enough already, and VBA doesn't make life any easier. I wanted to create some basic functionality to allow async processes to mark completion without having to ...
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0answers
22 views

Processing object writes to external datastore in parallel using ForkJoinPool and list streams

I have the following code. I wanted to see if you thought this was a good way to go about processing an array of objects in parallel using a ForkJoinPool and array streams. This is just a sample, in ...
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1answer
28 views

AppTaskWorker - Running class methods at sporadic intervals

I decided to write a class to do this for me. I had a lot of methods that needed to be invoked at sporadic intervals, across multiple projects. The dictionary will eventually be class methods, I ...
5
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0answers
372 views

Asyncio HTTP Request Queue

I wrote a simple sitemap.xml checker using asyncio and aiohttp. I followed the documentation demonstrating the producer/consumer pattern. However, I noticed that as the URLs scale larger, it seems to ...
6
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2answers
763 views

Async Queue implementation without locking

I wrote a quick implementation of an async queue that utilizes a backing ConcurrentQueue. It was pretty much based on an implementation given in this Stack Overflow ...
4
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1answer
368 views

Scraping urls asynchronous including exception handling

I'm trying to understand how to work with aiohttp and asyncio. The code below retrieves all websites in ...
4
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1answer
79 views

Async/Await Computation Expression

When writing asynchronous code in F#, one often needs to call methods in the .NET BCL that return Task or Task<T> rather ...
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1answer
1k views

Starting a process asynchronous

For executing a Process I've created an separate class which binds the possibilities together, for example reading output, start as Admin, catch Exceptions and also start all this asynchronous. Are ...
2
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0answers
35 views

Status dispatching of my redux-thunk async action (post request)

I'm trying to dispatch to my reducers the current status of my request. So far I'm wondering how refined the status publishing of my thunk action. I feel like my code is very verbose and I wonder ...
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1answer
342 views

Concurrent fire and forget async task queue

I had to do a lot of IO stuff on my server running Node JS where I did not really care about the result of the operations. The list of incoming tasks could be huge, so I had to limit the number of ...
5
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1answer
2k views

Async friendly Timer

I'm trying to implement a Timer that schedule an async action with the following requirements: thread safe only one action should be running at any given time (period countdown should start when the ...
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1answer
128 views

Async Task using RxJava2 in Android

I have tried to create the async task using the RxJAVA2. The code is working fine. WHat enhancement can I do in this code? ...
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0answers
34 views

TextFileConvert - dos2ux and ux2dos in VB.NET

This provides text file conversion capabilities like the common Unix utilities "ux2dos" and "dos2ux". I needed the capability to perform Unix text file conversions, round trip, within a VB.NET ...
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0answers
68 views

An asynchronous solution to send validation email [closed]

I intend to send validating message to User's email to complete a registration with the following codes: ...
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0answers
32 views

Validating a collection of proxy servers with maximum possible throughput

I am validating a collection of proxy servers and trying to achieve the maximum possible throughput. I've tested a few different methods, such as Task.WhenAll, TPL ...
3
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1answer
101 views

Issue tokens concurrently with synchronization per client

I have an API application with token authorization. A token is valid for one hour. Each business client has its own instance of the API application: ...
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0answers
2k views

Non-blocking C++ sockets [closed]

I'm trying to use sockets to create a simple client and server architecture and I'm wondering if there is any other way to create non-blocking, 'async' sockets instead using ...
5
votes
1answer
142 views

Deal with partial messages using SocketAsyncEventArgs

As you know, when dealing with SocketAsyncEventArgs, this is possible to receive partial messages and depending on the protocol used, you have to deal with it. In ...