Software Development

Say I want to implement a very basic group chat application. I use the H2 database, a user class, a controller, and a text file in the Resources folder that stores the chat texts. All texts would be appended to the text file and a JS function would refresh the page periodically with the file data. Now of course this will directly work only within my network. But if I upload this project to Heroku or something similar, would it still work as intended?

Almost all examples online use WebSocket. I'm unable to understand why because everyone connecting to the my app online will be served by the same controller and append data to the same text file. Or am I completely wrong?

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Comments on Will my implementation of a Spring Boot app work after being deployed on the Internet?

Will my implementation of a Spring Boot app work after being deployed on the Internet?

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