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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Dealing Synchronous Request in Asynchronous Code
Problem
I am trying to convert my synchronous code to an asynchronous implementation. Using aiohttp I was able to almost get where I want. My problem is how to ...
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Chat using async Python and sockets
I am trying out websockets using the python async framework aiohttp.
Basically I have created a game which will include multiple ...
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Asynchronous Stripe API and aiohttp parameters formatting
I'm testing the Stripe payment API. I couldn't find a Python wrapper that provides asynchronous requests so I'm writing one. My first goal was to implement the async equivalent of ...
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Implementation of a time lock with Python's asyncio
I have no idea if this kind of lock is called time lock, but I need something for the following scenario: I'm making a lot of concurrent requests with aiohttp, and ...
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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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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 ...
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Update UI once all API calls are done
I'm learning Swift at the moment but I would like to produce well-organised code. The goal of my little app is to display the weather of my current location.
I use :
the API of Darksky : https://...
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Queue with "unlimited" buffer in Go
This is small piece of bigger puzzle, but usable by its own.
It an attempt to have a nonblocking queue with "unlimited" (besides memory size) buffer length.
Got unit-tests 100% statement coverage, it ...
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Aysnc call back to UI Thread
My main DLL is a .Net one that has an async running method and fires an event when it's done:
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Email sender worker-pool skeleton in go
How to refactor this go code to make it more easy to understand and to maintain?
It is email sender worker-pool skeleton.
To understand the working-pool logic I coded it without real email client and ...
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HTTP download function in Rust (async/await)
Why am I fighting the compiler? - Wrote this, which works, but I feel like I'm breaking every rule in the book:
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Batching calls to server in python with asyncio
I've written this decorator to avoid too many requests to a backend. Did I get it right? Do I need some locks or can I assume some things are atomic / thread safe because this is asyncio?
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Middleware which lets developer maintain dynamic context
Problem Statement: Users can chat while the replies of the chatbot are based on past messages.
So the chatbot needs to have the context of the previous messages and reply accordingly. Here is ...
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Python Async Request using Tor and User-Agent Rotation
The code below will scrape data from three APIs. The APIs are for property listings. So, for each listing, I will have one request. There will be around 20000 requests. That's why I use ayncio to make ...
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Python AsyncIO pipeline
I wrote a small snippet to implement asyncio Pipeline - object that connects together Layers, and lets them create and pass ...
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Example Multiple Async Await Calls Javascript
I need to make an unknown number of api calls, up to 5 max probably. But most samples I've seen show only a couple of async calls so are effectively hard coded to the number of calls being made.
This ...
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Async in Railway Oriented Programming in F#
In F# the Railway Oriented Programming pattern can be implemented synchronously using the Result<'t,'terr> type as result value for functions, so they can be ...
user73941
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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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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).
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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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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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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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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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Making 10000 HTTP requests as fast as possible
I need a program that needs to gather data from large list of API end points. Below is a mock-up program that attempts to make 10000 requests as fast as possible. Any suggestions on how to improve on ...
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Testing whether pages can be fetched from two ports
I have an endpoint in my API which does a port test on 4455 and 4456 once a client GET's it. This is accomplished by requesting two web pages. The result will respond to the client with a JSON object:
...
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Cancel running Task on Dispose and race condition
I'm building a wrapper around NamedPipeServerStream and NamedPipeClientStream. Currently my ...
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Asynchronous sockets with begin/end and a state machine loop
Disclaimer: I am a C++ guy, so my C# is not even close. Therefore some review might be helpful.
Here is my 4th attempt at a client using asynchronous sockets. Please give feedback.
The hardest part ...
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Daemonizing shell scripts - MqSH
This is an mqtt driven, interactive, and asynchronous remote shell daemon written in bash. I call it "MqSH" or simply "mq". It works with bash, the busybox ash shell, and perhaps other Bourne-like ...
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Reading log file of subprocess
I run subprocesses with lot of output (compilation of Unity 3D projects).
I use log parsers to find known issues.
...
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Basic Server/Client Model built around ASIO
For this project, I'm using the non-Boost version of the ASIO library.
The basic idea is that it is a relatively simple stand-alone class capable of functioning either as a server or client depending ...
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Q.js worker pool
I'm building a program to scrape data about hockey games in order to compile statistics. One of the run modes will process all of the games in a single season (1230). Processing a single game consists ...
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Asynchronous TCP server refactor design & not working features
I'm working on an asynchronous TCP server which is supposed to be used for a chat. I want to get a review for the TCP server part because I'm struggling to find a good design to fulfill the following ...
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A reuseable reconnecting TCP socket with Asio
I'm using (non-boost) Asio 1.18.1 and C++17. Forgive the boost tag, there wasn't a more specific one.
I have a async_connect_with_retry composed asynchronous ...
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Asynchronous line-based communication with an external program
As part of a larger project, I've written the following code for interacting with git-annex's addurl command in batch mode. ...
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Implement Websocket using boost::asio::beast with serialized writes
Here's a proposal implementation of websocket using boost::asio::beast that is thread-safe to parallel writes.
In this example below, the ...
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Are nested calls to `asyncio.gather()` dangerous?
I wrote this ~100 line script recently, where I tried out Python's asyncio library. When it comes to asynchronous programming in Python, I just have 2 days of ...
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Read Data from a serial port and write to influxdb
I have a energy meter which sends the kWh count periodically every few seconds via a serial port.
To store this data I write the counter value and the calculated average power of the last 10s in a ...
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Fixed-width non-FIFO DispatchQueue
I have implemented a custom concurrent queue on top of GCD which offers two additional pieces of functionality:
Limit the maximum number of concurrently executing tasks.
Give manual control over ...
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CompletableFuture in Java, code that gets responses from different websites using HttpClient in Java. What can I do better?
I have a static list of Strings (website urls), I am trying to connect to them and get responses, in syncRequests method, I am using HttpClient in synchronous manner, in asyncRequests method, I am ...
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design to send multiple type http request
I have to send multiple HTTP requests where their payload will be different, type will be different, headers will be different, URL will be different etc. The code I have right now is
...
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I'm just starting out with tasks. I need to know if there's a better way to do TAP for socket handling (serving a request)
I've got this quick and dirty little console app in C# to serve an HTTP/HTML page.
...
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Asynchronous Web Crawler with Pyppeteer - Python
This weekend I've been working on a small asynchronous web crawler built on top of asyncio. The webpages that I'm crawling from have Javascript that needs to be executed in order for me to grab the ...
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Concurrent execution and coordination of C# tasks
I have a class, 'TaskCoordinator' which has 'BaseTask's applied to it.
The BaseTasks have OnStarted, OnFinished and OnCancelled events which are triggered to notify the calling class of their events....
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Synchronous use of Mongo-Scala Driver
The Mongo-Scala Driver (v2.6) currently only supports asynchronous operations, although my use cases often seem to lend themselves well to synchronous reads. This may be to block downstream code ...
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Node.js async task queue implementation
Here is an async task queue implementation. The idea is to reuse node.js standard library as much as possible.
...
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Implementing an efficient async FileSystem class based on libuv in C++
I currently am working on a game engine written in C++ with libuv backed for io system calls. I have a FileSystem class that just 'works'. I am allow to read files without blocking but the current ...
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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, especially the SetTimeout sections.
which part of the code should ...
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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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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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