Hello everyone :wave: I’m wondering if there is any merit or risks in combining `async` and `withCon...

# coroutines

[juan torres]

Hello everyone 👋
I’m wondering if there is any merit or risks in combining async and withContext(<http://Dispatches.IO|Dispatches.IO>) to be able to execute blocking code, in particular making multiple IO calls with Spring RestTemplate, in an asynchronous fashion like so:

fun <T> CoroutineScope.myRestTemplateAsync(
    context: CoroutineContext = EmptyCoroutineContext,
    start: CoroutineStart = CoroutineStart.DEFAULT,
    block: suspend CoroutineScope.() -> T
): Deferred<T> {
    return async(context, start) {
        withContext(<http://Dispatchers.IO|Dispatchers.IO>) { block() }
    }
}

The full description, observations, and code samples are in this SO Post

[knthmn]

you can just do async(context + <http://Dispatchers.IO|Dispatchers.IO>)

[juan torres]

Thanks @knthmn, It works great!

[knthmn]

Just to clarify, there is no risk of using async() and then withContext(). Both versions replace whatever Dispatcher specified in context with <http://Dispatchers.IO|Dispatchers.IO>