title: RxJava Scheduler interval http polling wait for request to finish before polling again?
body: <p>I'm using RxJava with AndroidFastNetworking library. If I wanted to use the Scheduler Class to create an Observable that initialized an Http request every 60 seconds, but I wanted it to wait for the initialized request to finish (either success or error) before starting the 60 second interval again and initializing a subsequent one, what would that look like? </p>