How to display poll for all logged users after the creation of the vote?

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I'm working on the project 'vote/poll' on android device's. I want it to work like this: - Users can login(I got REST API php for login/register and its okay for me and working), - Admin can create new voting(available options: yes, no) - i can do it with rest api and its easy for me(I'm beginner). My problem is how to display question and answers(yes/no) for all logged users? I think that I can make async method in client side like timer(send request to api per 1 sec and check new question in database, if it's new return response json) but i think that it's not professional(?) and very expensive(for server). Second solution is websocket but I have never used it and I'm afraid of it that I can't handle it. What do you think? Is there any other way?

BTW: 40 employees will use my system(Every Saturday for 3-5h only).

What I have tried:

I got rest API for register/login and create question but i don't know how to display in realtime question for Admin.

Posted 6-Jan-20 6:33am

jrJery

Updated 6-Jan-20 7:55am

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Gerry Schmitz · Answer 1 · 2020-01-06T07:55:00

Solution 1

40 queries per second if polling for 40 users at once per second. The simplest way to reduce traffic is to poll "less than once per second". And not at all if not necessary.

Posted 6-Jan-20 7:55am

Gerry Schmitz

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jrJery 6-Jan-20 14:46pm

If the user has the application open all the time(Every Saturday) I would have to send request per 1 sec to API for check global variable and if the global variable for example is equal 2 i have to request to API for question two from database. What do you think? I could limit my queries to the database.