Adding in memory caching to the sample

build.cmd

@@ -20,8 +20,8 @@ IF EXIST packages\KoreBuild goto run
 .nuget\NuGet.exe install Sake -version 0.2 -o packages -ExcludeVersion
 
 IF "%SKIP_KRE_INSTALL%"=="1" goto run
-CALL packages\KoreBuild\build\kvm upgrade -x64
+CALL packages\KoreBuild\build\kvm upgrade -amd64
-CALL packages\KoreBuild\build\kvm install default -runtime CoreCLR -x64
+CALL packages\KoreBuild\build\kvm install default -runtime CoreCLR -amd64
 CALL packages\KoreBuild\build\kvm install default -x86
 CALL packages\KoreBuild\build\kvm install default -runtime CoreCLR -x86
 

src/MusicStore/Areas/Admin/Controllers/StoreManagerController.cs

@@ -7,6 +7,7 @@ using MusicStore.Models;
 using System.Linq;
 using MusicStore.Hubs;
 using MusicStore.ViewModels;
+using Microsoft.AspNet.MemoryCache;
 
 namespace MusicStore.Areas.Admin.Controllers
 {
@@ -16,11 +17,13 @@ namespace MusicStore.Areas.Admin.Controllers
     {
         private readonly MusicStoreContext db;
         private IHubContext annoucementHub;
+        private readonly IMemoryCache cache;
 
-        public StoreManagerController(MusicStoreContext context, IConnectionManager connectionManager)
+        public StoreManagerController(MusicStoreContext context, IConnectionManager connectionManager, IMemoryCache memoryCache)
         {
             db = context;
             annoucementHub = connectionManager.GetHubContext<AnnouncementHub>();
+            cache = memoryCache;
         }
 
         //
@@ -58,12 +61,18 @@ namespace MusicStore.Areas.Admin.Controllers
         //
         // GET: /StoreManager/Details/5
 
-        public IActionResult Details(int id = 0)
+        public IActionResult Details(int id)
         {
-            Album album = db.Albums.Single(a => a.AlbumId == id);
+            string cacheId = string.Format("album_{0}", id);
+            var album = cache.GetOrAdd(cacheId, context =>
+            {
+                //If this returns null how do we prevent the cache to store this. 
+                return db.Albums.Single(a => a.AlbumId == id);
+            });
 
             if (album == null)
             {
+                cache.Remove(cacheId);
                 return HttpNotFound();
             }
 
@@ -102,7 +111,7 @@ namespace MusicStore.Areas.Admin.Controllers
 
         //
         // GET: /StoreManager/Edit/5
-        public IActionResult Edit(int id = 0)
+        public IActionResult Edit(int id)
         {
             Album album = db.Albums.Single(a => a.AlbumId == id);
 
@@ -126,6 +135,8 @@ namespace MusicStore.Areas.Admin.Controllers
             {
                 db.ChangeTracker.Entry(album).State = EntityState.Modified;
                 db.SaveChanges();
+                //Invalidate the cache entry as it is modified
+                cache.Remove(string.Format("album_{0}", album.AlbumId));
                 return RedirectToAction("Index");
             }
 
@@ -136,7 +147,7 @@ namespace MusicStore.Areas.Admin.Controllers
 
         //
         // GET: /StoreManager/RemoveAlbum/5
-        public IActionResult RemoveAlbum(int id = 0)
+        public IActionResult RemoveAlbum(int id)
         {
             Album album = db.Albums.Single(a => a.AlbumId == id);
             if (album == null)
@@ -154,6 +165,8 @@ namespace MusicStore.Areas.Admin.Controllers
             Album album = db.Albums.Single(a => a.AlbumId == id);
             db.Albums.Remove(album);
             db.SaveChanges();
+            //Remove the cache entry as it is removed
+            cache.Remove(string.Format("album_{0}", id));
             return RedirectToAction("Index");
         }
 

src/MusicStore/Components/AnnouncementComponent.cs

@@ -3,6 +3,7 @@ using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNet.Mvc;
 using MusicStore.Models;
+using Microsoft.AspNet.MemoryCache;
 
 namespace MusicStore.Components
 {
@@ -10,15 +11,21 @@ namespace MusicStore.Components
     public class AnnouncementComponent : ViewComponent
     {
         private readonly MusicStoreContext db;
+        private readonly IMemoryCache cache;
 
-        public AnnouncementComponent(MusicStoreContext context)
+        public AnnouncementComponent(MusicStoreContext context, IMemoryCache memoryCache)
         {
             db = context;
+            cache = memoryCache;
         }
 
         public async Task<IViewComponentResult> InvokeAsync()
         {
-            var latestAlbum = await GetLatestAlbum();
+            var latestAlbum = await cache.GetOrAdd("latestAlbum", async context =>
+            {
+                return await GetLatestAlbum();
+            });
+
             return View(latestAlbum);
         }
 

src/MusicStore/Components/CartSummaryComponent.cs

@@ -27,7 +27,7 @@ namespace MusicStore.Components
 
         private Task<IOrderedEnumerable<string>> GetCartItems()
         {
-            var cart = ShoppingCart.GetCart(db, this.Context);
+            var cart = ShoppingCart.GetCart(db, Context);
 
             var cartItems = cart.GetCartItems()
                 .Select(a => a.Album.Title)

src/MusicStore/Controllers/CheckoutController.cs

@@ -52,7 +52,7 @@ namespace MusicStore.Controllers
                     db.Orders.Add(order);
 
                     //Process the order
-                    var cart = ShoppingCart.GetCart(db, this.Context);
+                    var cart = ShoppingCart.GetCart(db, Context);
                     cart.CreateOrder(order);
 
                     // Save all changes

src/MusicStore/Controllers/HomeController.cs

@@ -1,4 +1,5 @@
-using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.MemoryCache;
+using Microsoft.AspNet.Mvc;
 using MusicStore.Models;
 using System.Collections.Generic;
 using System.Linq;
@@ -8,10 +9,12 @@ namespace MusicStore.Controllers
     public class HomeController : Controller
     {
         private readonly MusicStoreContext db;
+        private readonly IMemoryCache cache;
 
-        public HomeController(MusicStoreContext context)
+        public HomeController(MusicStoreContext context, IMemoryCache memoryCache)
         {
             db = context;
+            cache = memoryCache;
         }
 
         //
@@ -19,7 +22,7 @@ namespace MusicStore.Controllers
         public IActionResult Index()
         {
             // Get most popular albums
-            var albums = GetTopSellingAlbums(6);
+            var albums = cache.GetOrAdd("topselling", (context => GetTopSellingAlbums(6)));
 
             return View(albums);
         }

src/MusicStore/Controllers/StoreController.cs

@@ -1,4 +1,5 @@
-using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.MemoryCache;
+using Microsoft.AspNet.Mvc;
 using MusicStore.Models;
 using System.Linq;
 
@@ -7,10 +8,12 @@ namespace MusicStore.Controllers
     public class StoreController : Controller
     {
         private readonly MusicStoreContext db;
+        private readonly IMemoryCache cache;
 
-        public StoreController(MusicStoreContext context)
+        public StoreController(MusicStoreContext context, IMemoryCache memoryCache)
         {
             db = context;
+            cache = memoryCache;
         }
 
         //
@@ -39,11 +42,15 @@ namespace MusicStore.Controllers
 
         public IActionResult Details(int id)
         {
-            var album = db.Albums.Single(a => a.AlbumId == id);
+            var album = cache.GetOrAdd(string.Format("album_{0}", id), context =>
+            {
+                var albumData = db.Albums.Single(a => a.AlbumId == id);
 
-            // TODO [EF] We don't query related data as yet. We have to populate this until we do automatically.
+                // TODO [EF] We don't query related data as yet. We have to populate this until we do automatically.
-            album.Genre = db.Genres.Single(g => g.GenreId == album.GenreId);
+                albumData.Genre = db.Genres.Single(g => g.GenreId == albumData.GenreId);
-            album.Artist = db.Artists.Single(a => a.ArtistId == album.ArtistId);
+                albumData.Artist = db.Artists.Single(a => a.ArtistId == albumData.ArtistId);
+                return albumData;
+            });
 
             return View(album);
         }

src/MusicStore/Models/Album.cs

@@ -42,8 +42,8 @@ namespace MusicStore.Models
         /// </summary>
         public Album()
         {
-            this.OrderDetails = new List<OrderDetail>();
+            OrderDetails = new List<OrderDetail>();
-            this.Created = DateTime.UtcNow;
+            Created = DateTime.UtcNow;
         }
     }
 }

src/MusicStore/Startup.cs

@@ -14,6 +14,7 @@ using Microsoft.AspNet.Security.Google;
 using Microsoft.AspNet.Security.Twitter;
 using Microsoft.AspNet.Security.MicrosoftAccount;
 using Microsoft.AspNet.Security;
+using Microsoft.AspNet.MemoryCache;
 
 namespace MusicStore
 {
@@ -76,6 +77,10 @@ namespace MusicStore
 
                 //Add all SignalR related services to IoC.
                 services.AddSignalR();
+
+                //Add InMemoryCache
+                //Currently not able to AddSingleTon
+                services.AddInstance<IMemoryCache>(new MemoryCache());
             });
 
             //Configure SignalR

src/MusicStore/project.json

@@ -24,7 +24,8 @@
         "EntityFramework.InMemory": "7.0.0-*",
         "Microsoft.Framework.ConfigurationModel.Json": "1.0.0-*",
         "Microsoft.Framework.OptionsModel": "1.0.0-*",
-        "Microsoft.AspNet.SignalR.Server": "3.0.0-*"
+        "Microsoft.AspNet.SignalR.Server": "3.0.0-*",
+        "Microsoft.AspNet.MemoryCache": "1.0.0-*"
     },
     "commands": {
         "WebListener": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener --server.urls http://localhost:5002",