SOLVED: Approach/Method/Tool for executing the task performed by an API request at user defined time

Question

I am developing an application in Django which uses REST API. The API request performs a long-running Celery canvas task(chain of tasks- saves the input to the database, performs computation, and then saves the computation result to the database). This long-running task depends on the user's input. Now, I want to add a functionality that facilitates the user with performing this long-running task at a specific time given by the user himself, so how can I do that?

i.e. Suppose, there are 2 users making the same API request with their own set of input parameters, and User 1 wants to schedule his task to be executed at 5:00 AM and user 2 at 7:30 AM. How can I achieve this?

Frontend: Angular

Backend: MySQL, Python (Django, Celery)

Any help in this regard will be highly appreciated.

Answer 1

You can schedule a celery task using apply_async. You can pass a keyword argument named eta to apply_async, this is the exact time/date that the task will run.