aspnetcore/src/MusicStore/Controllers/StoreController.cs

using System;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNet.Mvc;
using Microsoft.Data.Entity;
using Microsoft.Framework.Caching.Memory;
using MusicStore.Models;

namespace MusicStore.Controllers
{
    public class StoreController : Controller
    {
        [FromServices]
        public MusicStoreContext DbContext { get; set; }

        [FromServices]
        public IMemoryCache Cache { get; set; }

        //
        // GET: /Store/
        public async Task<IActionResult> Index()
        {
            var genres = await DbContext.Genres.ToListAsync();

            return View(genres);
        }

        //
        // GET: /Store/Browse?genre=Disco
        public async Task<IActionResult> Browse(string genre)
        {
            // Retrieve Genre genre and its Associated associated Albums albums from database
            var genreModel = await DbContext.Genres
                .Include(g => g.Albums)
                .Where(g => g.Name == genre)
                .FirstOrDefaultAsync();

            if (genreModel == null)
            {
                return HttpNotFound();
            }

            return View(genreModel);
        }

        public async Task<IActionResult> Details(int id)
        {
            var cacheKey = string.Format("album_{0}", id);
            Album album;
            if(!Cache.TryGetValue(cacheKey, out album))
            {
                album = await DbContext.Albums
                                .Where(a => a.AlbumId == id)
                                .Include(a => a.Artist)
                                .Include(a => a.Genre)
                                .FirstOrDefaultAsync();

                if (album != null)
                {
                    //Remove it from cache if not retrieved in last 10 minutes
                    Cache.Set(
                        cacheKey,
                        album,
                        new MemoryCacheEntryOptions().SetSlidingExpiration(TimeSpan.FromMinutes(10)));
                }
            }

            if (album == null)
            {
                return HttpNotFound();
            }

            return View(album);
        }
    }
}