Mutiny Quarkus : Can you use Mutiny reactive programming in ArrayLists?

Question

I'm trying to learn Reactive programming in quarkus and run into a problem. I want to make a simple employee system without any database, just the ArrayList with the Employees but in every article and video tutorial i watched and read , there were all using Databases.Is there a way to use Mutli and Uni in just an ArrayList and Is it worth it at all?
Thanks for your time

Answer 1

You can easily do something like:

public class Fruit {

    public final String name;
    public final String description;

    public Fruit(String name, String description) {
        this.name = name;
        this.description = description;
    }
}

@Path("/fruits")
public class FruitResource {

    private final Set<Fruit> fruits = Set.of(new Fruit("Apple", "Winter fruit"), new Fruit("Pineapple", "Tropical fruit"));

    @GET
    public Uni<Set<Fruit>> list() {
        return Uni.createFrom().item(fruits);
    }
}

where all you are doing is returning a Set of Fruit objects via a Uni - no database or anything