Hi folks, ```override suspend fun acceptCode(code...

# coroutines

[George]

Hi folks,

override suspend fun acceptCode(code: String, account: SolidAccount): Unit = coroutineScope {
    val codeVerifierDeferred = async { sessionStorage.retrieveCodeVerifier(account) }
    val urlDeferred = async { sessionStorage.retrieveUserUrl(account) }

    authRequest(codeVerifierDeferred, urlDeferred, code, account)
}

override suspend fun acceptCode(code: String, account: SolidAccount): Unit = coroutineScope {
    val codeVerifierDeferred = async { sessionStorage.retrieveCodeVerifier(account) }
    val urlDeferred = async { sessionStorage.retrieveUserUrl(account) }

    authRequest(codeVerifierDeferred.await(), urlDeferred.await(), code, account)
}

Is there a real difference between these two? Thanks in advance !

[Matthew Gast]

The first code block will immediately call authRequest, the second block will call authRequest after both sessionStorage.retrieveCodeVerifier and sessionStorage.retrieveUserUrl have completed execution. If you are familiar with Java, Future is an analogue to Deferred (noting that Future.get will block while Deferred.async suspends).

[George]

Although im not familiar with Future of java i get what u mean. I pretty much get the differences but im curious about the performance.

in my case inside my fun i have this

<http://webClient.post|webClient.post>().apply {
    val codeVerifier = codeVerifierDeferred.await()
    bodyValue(TokenRequestBody(code, codeVerifier).asUrlBody())
    val opUrl = urlDeferred.await()
    val dpopHeader = generateDPoPHeader(<http://HttpMethod.POST|HttpMethod.POST>, OpUrl(opUrl))
    header("DPoP", dpopHeader)
    header("content-type", "application/x-www-form-urlencoded")
    uri(opUrl.toTokenEndpoint()).exchangeToFlow {
        flowOf(it)
    }.collect {

My guess is that it would make a difference if was really awaiting much later in the fun?

[Matthew Gast]

For this specific case, it does not look like it would matter much. However, there are definitely cases where you would want to pass the deferred reference instead of the completed value instead.

[George]

Thanks for the pointers !