SpringBoot Use more idiomatic Kotlin in example for "Map Health Indicators to Micrometer Metrics"

Please understand that I am not good at grammar because I am not an English speaker..

Hello, I am a 16-year-old developer who lives in Korea., I was looking at the spring docs part developed by Kotlin and saw MyHealth Metrics ExportConfiguration's private fun getStatusCode(). It was using the if statement to return it, so I suggest using a when statement while using Kotlin!

---

Before

private fun getStatusCode(health: HealthEndpoint): Int {
        val status = health.health().status
        if (Status.UP == status) {
            return 3
        }
        if (Status.OUT_OF_SERVICE == status) {
            return 2
        }
        if (Status.DOWN == status) {
            return 1
        }
        return 0
    }

After

1.

private fun getStatusCode(health: HealthEndpoint): Int {
        return when (health.health().status) {
            Status.UP -> 3
            Status.OUT_OF_SERVICE -> 2
            Status.DOWN -> 1
            else -> 0
        }
}

or

2.

private fun getStatusCode(health: HealthEndpoint) = when (health.health().status) {
    Status.UP -> 3
    Status.OUT_OF_SERVICE -> 2
    Status.DOWN -> 1
    else -> 0
}

If you want to apply the second option, please leave a comment I'll change it.

Thank you :)

Comment From: wilkinsona

This is great. Thanks very much, @esperar.

Comment From: mhalbritter

Thank you very much and congratulations on your first contribution :tada:!