Hands-On Design Patterns with Kotlin

Fixing starvation

Let's add another method to our Factory using the extension methods:

fun CoroutineFactory.longCoroutine(index: Int) = launch {    var uuid = UUID.randomUUID()    for (i in 1..100_000) {        val newUuid = UUID.randomUUID()        if (newUuid < uuid) {            uuid = newUuid        }        if (i % 100 == 0) {            yield()        }    }    println("Done longCoroutine $index")    latch.countDown()}

We call this method instead in the first loop:

...for (i in 1..10) {    CoroutineFactory.longCoroutine(i)}...

And when we run it now, we get the output we expected in the first place:

Done shortCoroutine 0!Done shortCoroutine 1!Done shortCoroutine 2!Done shortCoroutine 3!Done shortCoroutine 5!Done shortCoroutine 6!Done shortCoroutine 7!Done shortCoroutine 8!Done shortCoroutine 9!Done shortCoroutine ...