How to perform sequential actions after a certain period of time?

Question

JavaScript

There is a conditional file that contains in each line a json array in approximately the following format:
[time, data]
Time - milliseconds, for example:
[0, data]
[840, data]
[2000, data] It is
necessary that after starting the script with the corresponding delay sent data to the user through the socket.
How to implement it correctly?

Answer 1

Look for a task manager with the possibility of deferred task processing. For example, kue can queue pending tasks https://github.com/Automattic/kue#delayed-jobs and then write a handler for these tasks that will do something, for example, send data to the user via a socket. You can look for alternatives to kue that work directly with memory if you do not want to bloat the technology stack with radish. But I have not seen more or less popular alternatives.

Answer 2

Isn't it easier to run Promise for processing in a loop?

Answer 3

Read about queues (MQ).
Perhaps an implementation on the database is suitable, but on average it is "more correct" to use a ready-made queue server.