fix(seeding): seeding now follows .NET Core 2.0 best practices

Author: Detys

Program.cs

@@ -6,28 +6,42 @@
 using Microsoft.Extensions.Logging;
 using System;
 using System.IO;
+using System.Threading.Tasks;
 
-public class Program {
-     public static void Main (string[] args) {
-         var host = BuildWebHost (args);
-         using (var scope = host.Services.CreateScope ()) {
-             var services = scope.ServiceProvider;
-             try {
-                var context = services.GetRequiredService<SpaDbContext>();
-                DbInitializer.Initialize(context);
-            } catch (Exception ex) {
-                 var logger = services.GetRequiredService<ILogger<Program>> ();
-                 logger.LogError (ex, "An error occurred while seeding the database.");
-             }
-         }
+public class Program
+{
+    public static async Task Main(string[] args)
+    {
+        var host = BuildWebHost(args);
+        using (var scope = host.Services.CreateScope())
+        {
+            var services = scope.ServiceProvider;
 
-         host.Run ();
-     }
-     public static IWebHost BuildWebHost (string[] args) =>
-         WebHost.CreateDefaultBuilder (args)
-         .UseKestrel ()
-         .UseContentRoot (Directory.GetCurrentDirectory ())
-         .UseIISIntegration ()
-         .UseStartup<Startup> ()
-         .Build ();
- }
+            try
+            {
+                await EnsureDataStorageIsReady(services);
+
+            } catch (Exception ex)
+            {
+                var logger = services.GetRequiredService<ILogger<Program>>();
+                logger.LogError(ex, "An error occurred while seeding the database.");
+            }
+        }
+
+        host.Run();
+    }
+    public static IWebHost BuildWebHost(string[] args) =>
+        WebHost.CreateDefaultBuilder(args)
+        .UseKestrel()
+        .UseContentRoot(Directory.GetCurrentDirectory())
+        .UseIISIntegration()
+        .UseStartup<Startup>()
+        .Build();
+
+    private static async Task EnsureDataStorageIsReady(IServiceProvider services)
+    {
+        await CoreEFStartup.InitializeDatabaseAsync(services);
+        await SimpleContentEFStartup.InitializeDatabaseAsync(services);
+        await LoggingEFStartup.InitializeDatabaseAsync(services);
+    }
+}

Server/Data/CoreEFStartup.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace AspCoreServer.Data
+{
+    public static class CoreEFStartup
+    {
+        public static async Task InitializeDatabaseAsync(IServiceProvider services)
+        {            
+            var context = services.GetRequiredService<SpaDbContext>();
+
+            await context.Database.EnsureCreatedAsync();
+        }
+
+    }
+}

Server/Data/LoggingEFStartup.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Threading.Tasks;
+
+namespace AspCoreServer.Data
+{
+    public static class LoggingEFStartup
+    {
+        public static async Task InitializeDatabaseAsync(IServiceProvider services)
+        {
+            //Implent to your hearts' content
+        }
+    }
+}

Server/Data/DbInitializer.cs renamed to Server/Data/SimpleContentEFStartup.cs

@@ -1,16 +1,20 @@
 using System;
-using System.Linq;
-using AspCoreServer;
+using System.Threading.Tasks;
 using AspCoreServer.Models;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
 
-namespace AspCoreServer.Data {
-    public static class DbInitializer {
-        public static void Initialize (SpaDbContext context) {
-            context.Database.EnsureCreated ();
+namespace AspCoreServer.Data
+{
+    public static class SimpleContentEFStartup
+    {
+        public static async Task InitializeDatabaseAsync(IServiceProvider services)
+        {
+            var context = services.GetRequiredService<SpaDbContext>();
 
-            if (context.User.Any ()) {
+
+            if (await context.User.AnyAsync())
+            {
                 return; // DB has been seeded
             }
             var users = new User[] {
@@ -27,11 +31,9 @@ public static void Initialize (SpaDbContext context) {
                 new User () { Name = "Gaulomatic" },
                 new User () { Name = "GRIMMR3AP3R" }
             };
+            await context.User.AddRangeAsync(users);
 
-            foreach (var s in users) {
-                context.User.Add (s);
-            }
-            context.SaveChanges ();
+            await context.SaveChangesAsync();
         }
     }
 }