Which approach would you choose for the following:
App receives events notification from external source. As long as notification received, app needs to collect data from external API. After data from API received the call to API has to be repeated after 10 sec. And repeated again after 20 sec. An again after 40 sec and so on. In other words each notification should trigger N calls each call should be made after 10 x 2^n seconds.
Notifications occurs randomly with random rate. If at some point of time API call result in stop command no further calls has to be done.
What would you use and how would you structure an application? Supervised Tasks, GenStage, GenServer, would you spawn a new process for each call or would you track timings in single process? Could you provide architecture example?