MagicOnionを使ってリアルタイム通信ゲームを作る -4. サーバー処理-

// ==============================================
// Program.cs
// ==============================================
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Server.Kestrel.Core; // Kestrel is a cross-platform web server for ASP.NET Core
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using System.IO;
using System.Reflection;

namespace App.Server
{
    class Program
    {
        public static void Main(string[] args)
        {
            IHostBuilder builder = createCustomHostBuilder(args);
            IHost host = builder.Build();
            host.Run();
        }

        private static IHostBuilder createCustomHostBuilder(string[] args)
        {
            // https://docs.microsoft.com/en-us/aspnet/core/fundamentals/host/generic-host?view=aspnetcore-3.1#default-builder-settings
            IHostBuilder defaultBuilder =
                Host.CreateDefaultBuilder(args)
                    .ConfigureAppConfiguration(
                        (hostingContext, config) =>
                        {
                            var env = hostingContext.HostingEnvironment;
                            var path = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
                            // json(plane) -> json(各環境) -> 環境変数 -> コマンドライン引数 (右に行くほど優先順位上)
                            config.SetBasePath(Directory.GetCurrentDirectory())
                                  .AddJsonFile($"appsettings.json", optional: false)
                                  .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
                                  .AddEnvironmentVariables()
                                  .AddCommandLine(args)
                                  .Build();
                        }
                );

            IHostBuilder webDefaultBuilder = defaultBuilder.ConfigureWebHostDefaults(
                webBuilder =>
                {
                    IWebHostBuilder bld = webBuilder.UseKestrel(
                        options =>
                        {   // WORKAROUND: Accept HTTP/2 only to allow insecure HTTP/2 connections during development.
                            options.ConfigureEndpointDefaults(
                                endpointOptions =>
                                {
                                    endpointOptions.Protocols = HttpProtocols.Http2;
                                }
                            );
                            //options.Listen(System.Net.IPAddress.Parse("xxx.xxx.xxx.xxx"), 12345);
                        });
                    bld.UseStartup<Startup>();
                });
            return webDefaultBuilder;
        }
    }
}

// ==============================================
// Startup.cs
// ==============================================
using App.Server.Looper;
using Cysharp.Threading;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using App.Shared.Common;

namespace App.Server
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddGrpc(); // MagicOnion depends on ASP.NET Core gRPC service.
            services.AddMagicOnion();

            services.AddSingleton<ILogicLooperPool>(_ => new LogicLooperPool(SharedConstant.FPS * 2, Environment.ProcessorCount, RoundRobinLogicLooperPoolBalancer.Instance));
            services.AddSingleton<MatchingRoomManager>();
            services.AddHostedService<MainGameLoopHostedService>();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }


            app.UseRouting();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapMagicOnionService();
            });
        }
    }
}