Redis Async APIs

All Redis Client Managers implement both IRedisClientsManager and IRedisClientsManagerAsync so IOC registrations remain the same which can continue to register against the existing IRedisClientsManager interface, e.g:

container.Register<IRedisClientsManager>(c => 
    new RedisManagerPool(redisConnectionString));

Where it can be used to resolve both sync IRedisClient and async IRedisClientAsync clients, e.g:

using var syncRedis = container.Resolve<IRedisClientsManager>().GetClient();
await using var asyncRedis = await container.Resolve<IRedisClientsManager>().GetClientAsync();

If you want to force async-only API usage could choose to just register IRedisClientsManagerAsync where it only lets you resolve async only IRedisClientAsync and ICacheClientAsync clients, e.g:

public void ConfigureServices(IServiceCollection services)
{
    services.AddSingleton<IRedisClientsManagerAsync>(c => new RedisManagerPool());
}

//... 

public class MyDep
{
    private IRedisClientsManagerAsync manager;
    public MyDep(IRedisClientsManagerAsync manager) => this.manager = manager;

    public async Task<long> Incr(string key, uint value)
    {
        await using var redis = await manager.GetClientAsync();
        return await redis.IncrementAsync(key, value);
    }
}

Usage in ServiceStack​

Inside ServiceStack Services & Controllers we recommend using GetRedisAsync() to resolve an IRedisClientAsync:

public class MyService : Service
{
    public async Task<object> Any(MyRequest request)
    {
        await using var redis = await GetRedisAsync();
        await redis.IncrementAsync(nameof(MyRequest), 1);
    }
}

public class HomeController : ServiceStackController
{
    public async Task<ActionResult> Index()
    {
        await using var redis = await GetRedisAsync();
        await redis.IncrementAsync(nameof(HomeController), 1);
    }
}