Limit Kovenant promise by execution time

timedPromise.kt

/**
 * puts a time limit on the given [Promise]
 * make sure to specify [Promise.fail] and/or [Promise.always] to be aware of the
 * cancellation and be able to react accordingly
 *
 * @throws [IllegalArgumentException] if the given timeout is negative
 */
fun timedPromise(promise: Promise<Any, Exception>, millis: Long) {
    if (millis < 0) {
        throw IllegalArgumentException("Duration may not be negative: $millis")
    }

    //first promise wins, leading to the other being cancelled
    any(listOf(promise, task { Thread.sleep(millis) }))
}