How to output that the server has been started - kotlin

Question

I have the following code, that it going to start a http server:
class MainVerticle : CoroutineVerticle() {
override suspend fun start() {
val server = vertx.createHttpServer()
val router = Router.router(vertx)
router.route("/api/genders*")
.subRouter(GenderApi(vertx).create())
server.requestHandler(router)
.listen(8080)
.await()
}
}
Now, I would like to output, if the server has been successfully started or failed(in case the port has been already occupied).
Without the Coroutine, the codes would be:
class MainVerticle : AbstractVerticle() {
override fun start(startPromise: Promise<Void>) {
val server = vertx.createHttpServer()
val router = Router.router(vertx)
server.requestHandler(router).listen(8888) { http ->
if (http.succeeded()) {
startPromise.complete()
println("HTTP server started on port 8888")
} else {
println(http.cause())
startPromise.fail(http.cause());
}
}
}
}
Here I do output, if the server has been started success or not.

Answer 1

If you use coroutines, add a try/catch block:
class MainVerticle : CoroutineVerticle() {
override suspend fun start() {
val server = vertx.createHttpServer()
val router = Router.router(vertx)
router.route("/api/genders*")
.subRouter(GenderApi(vertx).create())
try {
server.requestHandler(router)
.listen(8080)
.await()
println("HTTP server started on port 8888")
} catch (e: Exception) {
println(http.cause())
throw e
}
}
}