Community Answer: Processing a File in a Background Thread

In this video, Alejandro Duarte shows how to use Vaadin Framework 8 to implement a Spring Boot web application with these requirements:
1. Allow users to upload a file.
2. Show a “spinner” in the UI while the file is being uploaded.
3. When the file is uploaded, process the file in a background thread in the server.
4. Show the progress of the processing task in the UI.
Links:
Follow Alejandro on Twitter: / alejandro_du
The code is available on GitHub: github.com/alejandro-du/commu...
Written summary: vaadin.com/blog/community-ans...
You can find the question that inspired this video here: vaadin.com/forum/#!/thread/16...
Watch more Community Answers here: • Community Answers

[@Gregzenegair]

Alejandro saves the day once again. Thanks

[@FabioEbner]

Can I only update the screen of my UI? is it possible of any class? for example my ViewImpl? how? tks

[@andreashohmann5994]

Please can you explain some details about access vs. sync access? Is it "best practise" to use access all the time? When should I use sync access? Thanks :D

Hi, what would be a preferred way to cancel the background thread? For instance, if I would have one long-running loadMethod and I wouldn't wait any longer but instead want to quit the process I have started.

[@CenturionDobrius]

Alejandro Duarte Nice and useful.

[@Cashbeee]

damn, how big is your t-shirt.png ? :D

[@MiroslavJahelka]

processing? how to process : upload a zip file and save different files from the zip to different table columns??