The asynchronous-programming tag has no usage guidance.
2
votes
3answers
71 views
What is the right architecture for scalably scheduling and managing frequent periodic asynchronous?
I have built a setup which solves my problem, but I've pretty much just hacked it together by reading AWS docs and trying things out, so I want to see if there is a better way.
For the purpose of ...
1
vote
1answer
100 views
Async I/O operations - proper way to avoid deleting object
Using async I/O operations from boost::asio I often need shared pointers (and enable_shared_from_this and shared_from_this in callbacks) to avoid deleting objects too early. I think that it could be ...
2
votes
3answers
145 views
Writing new code in async but calling sync
I am writing some new code and would like to write it using async and await, but the calling code does not currently support async. Is it right to write the new code in async and call it sync until ...
0
votes
0answers
44 views
Merging waitable objects
Lets say you have two (or more) objects from which both allow a thread to wait for an event to occur.
Foo.Wait(timeout);
Bar.Wait(timeout);
The main thread wants to wake up when either of these ...
-1
votes
1answer
29 views
How to name functions which continue a process after an asynchronous step
Say that you have an web application which prints pages in a document. Suppose that after validating the page range, the application does the following:
If a billing option is turned on, it first ...
2
votes
1answer
74 views
Would the APM be faster or more efficient than TAP?
I'm doing some research for a project in which I will need to create a service which can handle millions of requests per minute. Clearly I want to use an asynchronous programming model to make the ...
0
votes
0answers
51 views
can a parallel queue empty itself?
Is there a way to accomplish this pseudo-code in C# in .NET4.5?
parallelQueue.attemptDequeueFirstItem(item)
success -> ( doAsyncTask(item).Success(UpdateDatabase) )
...
5
votes
2answers
92 views
Synchronous facade hiding asynchronous web service
I'm maintaining a system providing a typical synchronous web service REST API. It routes each request to one of several possible backend services. Now there is a new backend I want to use, but there ...
1
vote
1answer
165 views
HTTP Async/Await Task: avoid flooding server with requests?
I have a scenario where I have a Windows Store Application, there is a page with a search functionality, the user types names in a textbox and the app searches for names similar to the typed text.
...
1
vote
0answers
123 views
Is the logic behind `Asyncio.wait()` and async/await, the same, just the code is written differently (syntax)?
I'm learning Python, more specially parallel programming using Python Parallel Programming Cookbook by Giancarlo Zaccone.
At the time the book was published async/await was still in the beta version ...
20
votes
1answer
1k views
Is there really a fundamental difference between callbacks and Promises?
When doing single-threaded asynchronous programming, there are two main techniques that I'm familiar with. The most common one is using callbacks. That means passing to the function that acts ...
4
votes
1answer
128 views
UML: Should an asynchronous request-response message exchange be modelled as two ports/interfaces or one
I want to model an asynchronous request-response message exchange in UML.
The request is sent from a client to a server. The server responses asynchronously.
This can be modelled in a component ...
0
votes
1answer
204 views
Do any languages have syntax for promises? [closed]
I'm really glad that EcmaScript 6 has promises built into the language, but the syntax will still be quite wordy:
new Promise(f).then(r => {
...
}).then(r2 =>
...
}).catch(...
I'm just ...
0
votes
0answers
57 views
Broadcasting events asynchronously in a high frequency application to prevent hangs?
I'm doing a bit of socket.io work in an application that demands high frequency updates with minimal wait times (imagine a commentator annotating a video livestream, with viewers both watching the ...
5
votes
1answer
296 views
Best practice for parameters in asynchronous APIs in Java
Is there a best practice for using Guava's ListenableFuture in parameters in API calls? Compare these two versions of an interface that internally does a compare-and-set (I'm using Guava's ...
4
votes
1answer
211 views
How is one supposed to deal with the intermediate buffer of DataReader class?
Summary
I am developing a WAV file format reader under WinRT, and for this I need to read random amounts of structs consisting of fundamental types such as int, uint, float and so on.
Back in ...
1
vote
1answer
266 views
How should I handle the fetching of cached data in iOS
I'm developing an app at work, this is my first big application and in my smaller projects I didn't use caching at all.
What's currently happening
When the user logs on for their very first time ...
4
votes
1answer
348 views
C# async/await: Pedantry vs. the Debugger
I'm playing around with async and await, and they seem pretty intuitive, but some of the things I'm reading about these keywords doesn't make sense to me. In fact, some of it seems to me to be ...
6
votes
1answer
1k views
Does Akka obsolesce JMS/AMQP message brokers? [closed]
I spent the last week deep diving into the Akka docs and finally understand what actor systems are, and the problems that they solve.
My understanding (and experience with) traditional JMS/AMQP ...
2
votes
2answers
227 views
Reading using non-blocking IO on a fd asynchronously in C++ (moving from Node.js)
I'm trying to switch my brain from Node.js/Objective-C iOS programming to C++ programming, and it's a little bit taxing. Node.js and Objective-C with iOS do not have a run loop that I am supposed to ...
3
votes
1answer
84 views
Connection between futures and exceptions?
Is there a connection between futures and exceptions? async-await looks very similar to throw-catch.
3
votes
2answers
235 views
Async library guidance
I'm creating a library that contains a class that exposes several Async methods:
public class MyClass {
public async Task<Foo> DoFooAsync() { /*...*/ }
public async Task<Bar> ...
2
votes
1answer
210 views
JS Async: . Can I forget callbacks all together and replace with promises and/or generators [duplicate]
I've been using Nodejs and I really dislike callbacks (as i think most people do.)
I'm starting to learn about promises and generators. Both are a lot cleaner and I'd like to forget the horrors of ...
1
vote
1answer
127 views
Mixing reactive programming with non-reactive return requirements
Variable context from an initial non-reactive caller
The whole application cannot be reactive i.e. this method needs to return a result here
public string GetTextOfInterest()
{
var ...
2
votes
2answers
610 views
Blocking function call with asynchronous content
I am sure that this is a common design pattern, but I seem to have a blind-spot.
I have a requirement that the function call from Application to Service be blocking, but service needs to do ...
9
votes
1answer
440 views
When asynchronous tasks make a bad UX
I'm writing a COM add-in that's extending an IDE that desperately needs it. There are many features involved, but let's narrow it down to 2 for the sake of this post:
There's a Code Explorer ...
1
vote
1answer
98 views
Equivalent translation of Asynchronous behaviour in C
As a follow-up to my other question, if one were to build a general-purpose translator from a language that has support (be it with an external library or otherwise) for asynchronous behaviour to a ...
3
votes
1answer
775 views
Implementation of Asynchronous function call in C
I took it upon myself recently to work towards making a general-purpose Translator to automatically translate js programs into C, but I got stuck when thinking of asynchronous behaviour. Using ANSI / ...
1
vote
1answer
890 views
C#/.NET multithreaded application design
The application to be designed serves as a bridge between two different systems.
One natively speaks TCP (RS232 actually, but there's a COM->ETH server in the line of communication) - the other one is ...
-3
votes
1answer
312 views
using node.js server with mysql-module and PHP for a penny-auction website? [closed]
I'm building a penny-auction platform like DealDash and just read into the WebSocket and node.js topic.
I used PHP, MySQL and Ajax to build the website. I'm nearly finished and just have to implement ...
7
votes
1answer
395 views
Language compiled to JS – most elegant way to do synchronous-style waits
I'm trying to make (yet another) language that compiles to JavaScript. One of the features I'd like to have is the ability to perform JavaScript's async operations synchronously (not exactly ...
0
votes
1answer
155 views
Can you refer to the callback function as an API?
A system design is decoupled into two layers say layer A and layer B.
The interaction between layer A and layer B occurs through an interface that is exposed by layer B in form of an API. This ...
1
vote
1answer
1k views
Using $timeout to normalize response time of a webservice call (Best practice question)
Consider you have a simple, standard $http request to a REST api:
...
function makeCall() {
var restURL = "http://my-rest-api/endpoint";
return $http.get(restURL);
}
...
If the execution ...
1
vote
1answer
224 views
Experiences with C++ Async/actor model Library [closed]
I am fairly experienced with async and concurrent programming in c# using event, actor, and task based patterns, but now I have a task in c++ with which I have basic familiarity and it needs some ...
2
votes
1answer
97 views
What are the underlying patterns in systems allowing asynchronous operations?
Say I'm working with a system that allows async, nonblocking operations. If I queue up a set of those operations and specify their result buffer references:
nonblocking_write( message, write_buffer ...
0
votes
2answers
122 views
When are nonblocking read or receive operations useful?
Regardless of library, language, or spec, asynchronous send/write operations make sense to me, because code later in the execution path may not have any dependency upon the success or failure of the ...
1
vote
2answers
305 views
Observer pattern: Prevent multiple firings on changed internal property
I have an object Foo that has 2 public properties: A and B.
These properties can be changed from outside, as the application I'm working on is using a data-binding architecture. This is the ...
2
votes
3answers
139 views
Stopping asynchronous systems
I have a system which has 5 services. Each are run in a separate process. They resemble an assembly line, in the sense that they mostly process messages in the same order 1->2->3->4->5, however it's ...
1
vote
3answers
214 views
Using message queue systems - forcing synchronous processing
I have a php process producer-a which places a job on RabbitMQ a - deferring processing to a third-party service. The 3rd party service completes processing a and places a response onto queue b. I ...
3
votes
1answer
239 views
Ways to do callback, when and where
I've recently started to do some more complicated programming with network-related work on iOS with Swift.
This introduced a lot of asynchronous code not only in networking but also some exchange of ...
2
votes
1answer
772 views
Use cases and usage patterns of futures vs callbacks
I've become interested in futures lately, mostly due to their inclusion in standard C++ - but I see there is an active debate over futures vs. callbacks in many programming areas, such as Node.js.
...
0
votes
1answer
165 views
Async properties in interfaces to cater for the possibility of expensive first-time evaluation: Is this a good idea?
First of all, sorry if this post is too long. I'll start with the…
Short version:
Is it generally advisable or a good idea to design an interface property as asynchronous simply because we cannot be ...
3
votes
1answer
595 views
Functional programming pattern for async JavaScript code
I have adopted a pattern in one of my projects that I really like and I suspect it's likely to be something standard. I'd like to describe it here and see if you guys can tell me how other ...
2
votes
0answers
185 views
Callback pattern handling exceptions - Best practices in .NET 3.5
I am looking to implement the callback pattern with error handling such that error is caught and pass to the callback code with the response. Since I am using .NET 3.5, I cant use Task (TAP) pattern ...
0
votes
2answers
205 views
In Node.js, are non-blocking constructs usually preferable to blocking ones?
Is the following a statement of best practices in Node.js with regard to web applications? If not, how could it be improved?
The statement
The lifecycle of any web app has at least two phases: a ...
4
votes
1answer
137 views
What is a good design approach in .NET for performing a series of checks in background process?
I have a flight planning system in .NET/SQL Server which needs to perform several validation checks. This needs to work on both a windows and a web client. Currently the checks run synchronously but ...
-2
votes
1answer
127 views
Asynchronous Web Language [closed]
I'm searching for a suitable way to make web requests to databases and display results in real-time. The data will be used in an interface for staff, so there cannot be any blocking or lag as time is ...
1
vote
0answers
98 views
Synchronizing web ui and third party async services
I'm looking for concepts, approaches or even Framework/libraries to help me synchronize state reliably from web UI to a third Party Service.
For example: creating a JavaScript irc Client ui you need ...
3
votes
2answers
829 views
Combining asynchronous and synchronous programming
I've got trouble wrapping my head around a certain problem:
In my data-flow app (a visual editor), I have both autonomous objects which communicate though ports via unordered simultaneous messages ...
3
votes
1answer
237 views
How to handle asynchronous calls in an offline application
I'm using an offline application's javascript API and I'd like to know if I can use deferred objects to handle the callbacks. The API calls do not use HTTP, the calls are to and from the applications ...
