Reactive Programming in Kotlin

Schedulers.single()

The Schedulers.single() provides us with a scheduler that contains only one thread and returns the single instance for every call. Confused? Let's make it clear. Think of a situation where you need to execute tasks that are strongly sequential—Schedulers.single() is the best available option for you here. As it provides you with only one thread, every task that you enqueue here is bound to be executed sequentially.