functions_work_in_different_threads

functions_work_in_different_threads.txt

internal suspend fun downloadUserData(): String {
    withContext(Dispatchers.IO) {
        println("downloadUserData started on ${Thread.currentThread().name}")

        val result1 = async { receiveAdditionalUserData(taskNumber = 1) }
        val result2 = async { receiveAdditionalUserData(taskNumber = 2) }

        println(result1.await())
        println(result2.await())

        // Long asynchronous work is performed here.

        println("downloadUserData finished on ${Thread.currentThread().name}")
    }
    return "User data downloaded"
}

private suspend fun receiveAdditionalUserData(taskNumber: Int): String =
    suspendCoroutine { continuation ->
        println("receiveAdditionalUserData number: $taskNumber started on ${Thread.currentThread().name}")

        thread {
            println("downloadAdditionalUserData number: $taskNumber, background work on ${Thread.currentThread().name}")
            
            // Long asynchronous work is performed here.

            continuation.resume("AdditionalUserData $taskNumber received")
        }

        println("receiveAdditionalUserData number: $taskNumber finished on ${Thread.currentThread().name}")
    }

internal suspend fun downloadUserAvatar(): String {
    withContext(Dispatchers.IO) {

        println("downloadUserAvatar started on ${Thread.currentThread().name}")

        // Long asynchronous work is performed here.

        println("downloadUserAvatar finished on ${Thread.currentThread().name}")
    }
    return "Avatar downloaded"
}