IStartupSelector with async preload

Unity Engine
, ,
1

Hello

I have a custom startup selector that should read the value from a file that could be somewhere and I’d prefer to read it asynchronously. I read here that I could use IPreloadRequired but how do I even use that? I have an async read file method that I want to use for my preload operation.

Some pseudo-code of what I’d like to do:

[Serializable]
public class SettingLocalizer : IStartupLocaleSelector, IPreloadRequired
{
    public Locale GetStartupLocale(ILocalesProvider availableLocales)
    {
        return SettingsManager.LoadLanguage();
    }

    public AsyncOperationHandle PreloadOperation
    {
        get
        {
            // await SettingsManager.LoadSettingsAsync();
        }
    }
}

Any help would be appreciated!

2

Ah, we don’t support IPreloadRequired in the StartupSelectors. Its mainly used by databases. What you could do is put your async work into an Addressables initialization object:
https://docs.unity3d.com/Packages/com.unity.addressables@1.20/manual/InitializeAsync.html#initialization-objects

Do your initializing and then set the results in the SettingLocalizer which will be called once all the initialization has been completed.

3

Ah, I’ll look into that! Is it 100% safe that my initialization object will be called before the startup selector so I know it exists?

4

Yes, it’s fine. The LocalizationSettings will be available however they won’t be initialized so don’t try and access the Locales. You will be fine to access your startup selector through.
E.G

var mySelector = (SettingLocalizer)LocalizationSettings.StartupLocaleSelectors.Find(s => s is SettingLocalizer);
mySelector.someValue = data;
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