java - Firebase Firestore retrieve data Synchronously/without callbacks

Question

I am using Cloud Firestore in a separate thread in my Android app, so I don't want to use listeners OnSuccessListener and OnFailureListener to run in yet another thread. Can I just make my thread wait for the result (and catch any exceptions if needed)?

Currently the code for querying is something like this:

FirebaseFirestore.getInstance().collection("someCollection").get().addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
    @Override
    public void onSuccess(QuerySnapshot documentSnapshots) {
         // do something on the UI thread with the retrieved data
         }
    });

What I'd like to have:

FirebaseFirestore.getInstance().collection("someCollection").getAndWaitForResult();
//Block the thread and wait for result, no callbacks. 
//getAndWaitForResult() is not a real function, just something to describe my intention.

I used to work with Parse Server before, and it was quite trivial there.

Answer 1

Waitting for answers