I have to use an API that accepts an

Executor

as a parameter. How can I create an

Executor

that is backed by

Dispatchers.Default

? There is no

CoroutineDispatcher.asExecutor()

function unfortunately

what's the rest of the api

backing it with a dispatcher isn't going to do much for you in terms of bootstrapping into coroutine-world

I just want the Biometric API to use an already existing thread pool

you can also just use any old handler's

myHandler::post

as an Executor and bounce off the main thread, no need to spin up a different one

I’m not sure what you mean by a direct executor

a direct executor is one that just runs an incoming runnable inline without any sort of dispatching

but yeah, I would be sending the results to a channel that would be consumed on the main or a

Dispatchers.Default

thread

if your callback implementation just offers into a channel (or the channel of a

callbackFlow

, or similar) then there's no reason to have the executor bounce between threads an extra time

the UI would consume the channel and send the result to the

ViewModel

which processes intentions/actions on

Dispatchers.Default

whatever you like 🙂 the important part here is that if you're already doing a thread or dispatch hop by sending through a channel or resuming an intercepted continuation, you don't need the Executor to define where the callback should run - it doesn't matter since you're doing your own dispatch into coroutines-land inside the callback itself.

ahh, interesting. the thread the callback executes on doesn’t matter because it will be sent elsewhere anyway 👍

yep