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Cancellation Token in .NET | Exploring C# and DOTNET
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- Опубликовано: 13 авг 2024
- Hey 👋 Imagine having a long-running request triggered by a user on your server. But, the user is no longer interested in the result and has navigated away from the page.
However, the server is still processing that request and utilizing resources until you come along and implement Cancellation Tokens in the application code.
.NET uses Cancellation Token for cooperative cancellation of asynchronous or long-running synchronous operations.
So let’s learn more about Cancellation Token and save some of that server compute time.
I will show you the problem of unnecessarily spending server resources on no longer required processes and how to solve them using Cancellation Tokens.
We will see an example of using Cancellation tokens in a console application, in a long-running HTTP API Endpoint, and when making external calls to API Endpoints. I will use Amazon S3 to show how you can use Cancellation Tokens to cancel from uploading large documents when they are no longer required.
Thank you to AWS for sponsoring this video.
🔗 Blog - www.rahulpnath.com/blog/cance...
🔗 Code - github.com/rahulpnath/youtube...
00:00 Introduction
00:44 The Problem
03:22 What is Cancellation Token
04:48 Cancellation Token Demo
08:12 Passing Cancellation Tokens
10:09 Listening to Cancellation Requests
10:32 Cancellation Token In API
13:30 Cancellation Token and HTTP API Calls
13:54 AWS S3 Storage
18:05 Should you always Cancel?
Additional Watching
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📹RabbitMQ Series - bit.ly/rabbitmq-net-series
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#dotnet #csharp
I would be interested in seeing some of those other patterns you were talking about for handling cancellation tokens!
Thank you Ralph. Adding this to my list!! Glad you liked this.
Your channel is a gem. Really clear delivery of concepts with coherent and easy to follow examples. Thanks for the upload.
Glad you think so!
Thanks for posting this video, I was requested to post the the cancellation token video a long back ago. This video will helps me to implement in my project. Thanks a lot.
Glad it was helpful Suresh! Do let me know if you have any other suggestions.
thanks bro, love from Pakistan. just found your awesome channel and subscribed
Glad you are finding the videos helpful Arsam !! And thank you for subscribing 😍
Nice video and very well explained. Would like you to request to create more videos on cancellation token. Cheers !!!
Thanks a lot Rahul. I was reading this topic yesterday. Now you have upload video for the same. I am also watching your aws videos. It is really fantastic.
Glad you like it Arjun! Do let me know if you have any suggestions or feedback
Superb Video, glad you made this type of useful contents
Yay!!! New Rahul Nath content!!
Thank you for your support!!
Great learning video,thank you..can you please share git path also?
Glad you liked it Susanta - Code is available here github.com/rahulpnath/youtube-samples/tree/main/cancellation-token-example
Very helpful! Thanks a lot Rahul
Most welcome Faisal!
My ask might be basic, but Could you Please add an Example where UI can call a cancellation as in realtime where we cant capture console.keypress or swagger window closure
By "UI" Are you referring to desktop or mobile native UI like WinForms , WPF, UNO or Avalonia UI ?
Hey Rahul, what is the terminal that you are using
Windows Terminal - More details here www.rahulpnath.com/blog/setting-up-windows-terminal/
Please please creaate separte video which covers other methods to cancel the operation. it would be very helpfull to me.
Does it cancel database operations? if I requested Cancellation Token does it cancel all long running sql query?
Yes it does if you pass along the token.
Great presentation and video series.
In the console project, you initiate cancellation using a button press. In the API, you demonstrate cancellation when the browser is closed. Is there a way to implement cancellation from a button click in a .NET UI to cancel the API without closing the browser, or through a refresh action?
Thank you! You should be able to use AbortController! I will try and do a video around this topic.
@@RahulNath Thanks for the hint, I located the AbortController reference on mdn web docs.
@@duanelakoduk561 hope you were able to solve it using that
Hey Here's a video I made on that and just published! ruclips.net/video/tSEc5hXx1TM/видео.html
You are great Sir thank you
So nice of you - thank you ! And you call me Rahul 😀Do let me know if you have any topic suggestions or feedback
@@RahulNath new advance topic like Mico services and how they communice or for me Identity server 4 or you dive in this topic how user can make searching for example and another button for cancel the searching
Hi Rahul can you please make a tutorial on azure durable functions 😊 Thanks in Advance
Thank yo ufor the suggestion Rahul. Yes this is on my list!
Excelente, thank you for sharing this topic. Do you have this source code in somewhere to download ?, Thank you.
Glad you liked it Carlos. Yes the source code is available here github.com/rahulpnath/youtube-samples/tree/main/cancellation-token-example
Thank you so much. @@RahulNath
sir please make an c# full course , 2024
Thank you for the suggestion. I'm planning to add more videos around C# fundamentals to this channel.