What happens when unsubscribing from a certain operation?

[CooperRS]

Hey!

Thank you for this nice library wrapping Foogle Fit into a nice RxFit API 🙂.

Given I am starting a Google Fit session using RxFit.sessions().startSession(...). Executing startSession(...) returns a Single, subscribing to that Single actually starts the process to start the Google Fit session. So far, everything is clear to me.

But starting the session is a process that may take some seconds. I was wondering what the right course of action is if the user decides to cancel in this time?

Intuitively, I would unsubscribe from the Single that has been returned by startSession(...). But would this actually cancel the Google Fit API call? Furthermore, if it cancels the Google Fit API call: Is it guaranteed, that no Google Fit Session is started? Or may canceling the operation lead to an unknown state where a Google Fit session may be started or not depending on how far Google Fit came setting up the session?

Thanks for the answers!
Roland

[patloew]

The GoogleApiClient is disconnected on unsubscribe. Therefore, the PendingResult is also cancelled, if it was not already successful. I can not guarantee you the exact behavior, e.g. when you unsubscribe at the same moment as the PendingResult ResultCallback is/would be called.