Observer Inside Symfony + Benefits

Hi there,

I'm not sure that I understand this:

Both XpEarnedObserver and XpCalculator are services. So we would normally autowire them from the container, not instantiate them manually. We are autowiring GameApplication... but our overall situation isn't quite right. In a perfect world, by the time Symfony gives us this GameApplication, Symfony's container would have already hooked up all of its observers so that it's ready to use immediately. How can we do that? Let's do it the simple way first.

Are there any benefits in your specific case (the game) to hooked up all the observers before that Symfony serves the GameApplication ?

Another question, instead of using the subscribe method can we do something like that or it's break the Observer Pattern:

service.yaml

_instanceof:
    App\Observer\GameObserverInterface:
        tags: ['game.observer']
App\GameApplication:
    arguments:
        $gameObserver: !tagged_iterator game.observer

GameApplication.php

/**
 * @var GameObserverInterface[]
 */
private iterable $gameObservers;

public function __construct(
    private CharacterBuilderFactory $characterBuilderFactory,
    iterable $gameObserver
) {
    $this->gameObservers = $gameObserver;
}