BookstoreUsage.kt

val scope = CoroutineScope(Dispatchers.IO)

fun main() {
    val channel = AndroidChannelBuilder
        .forAddress("127.0.0.1", 9090)
        .build()

    val book = BookOuterClass.Book.newBuilder()
        .setId(1)
        .setTitle("gRPC In-Depth")
        .build()

    val createBookRequest = BookOuterClass.CreateBookRequest.newBuilder()
        .setBook(book)
        .build()

    val stub = BookstoreGrpcKt.BookstoreCoroutineStub(channel)

    scope.launch {
        try {
            stub.createBook(createBookRequest)
        } catch (e: StatusException) {
            // handle exception
        }
    }
}