Dealing with interfaces

[sommmen]

Hello,

Lets say i want to cache an interface type, currently i have to do something like this:

private IStore ToStoreModel(Store dbStore, IReadonlyExternalStore externalStore) ...
...

public async ValueTask<List<IStore>> GetAllActiveStores(CancellationToken token = default)
{
    return (await _cache.GetOrSetAsync("active_stores",
            async cancel =>
            {
                var stores = await GetAsync(_repository.GetAll().Where(c => c.IsActive), cancel);
                // Cache needs concrete type.
                return stores.Cast<StoreModel>().ToList();
            },
            tags: [nameof(Store)],
            token: token))
        .Cast<IStore>()
        .ToList();
}

Is there some way of improving this?
Can i for ex. use JsonDerivedType?

[jodydonetti]

Hi @sommmen I assume the problem you are thinking about is related to serialization, right?

If so: yes, you can totally use interfaces directly... if your serializer of choice supports them.

I did this in the past with both Newtonsoft.Json and System.Text.Json, by using the related facilities: usually it's a matter of registering some converters or similar in the serializer settings, and you can pass that when creating the serializer "adapter" you pass to FusionCache (eg: new FusionCacheSystemTextJsonSerializer(settings...)).

Hope this helps, let me know.

[sommmen]

Hi @sommmen I assume the problem you are thinking about is related to serialization, right?

If so: yes, you can totally use interfaces directly... if your serializer of choice supports them.

I did this in the past with both Newtonsoft.Json and System.Text.Json, by using the related facilities: usually it's a matter of registering some converters or similar in the serializer settings, and you can pass that when creating the serializer "adapter" you pass to FusionCache (eg: new FusionCacheSystemTextJsonSerializer(settings...)).

Hope this helps, let me know.

Hiya - someone else set this up and i see;

b.WithSerializer(new FusionCacheNewtonsoftJsonSerializer(new JsonSerializerSettings
{
    ReferenceLoopHandling = ReferenceLoopHandling.Ignore
}));

So i can propably use TypeNameHandling = TypeNameHandling.All and this would work.
Thanks for taking the time to answer my question!