Merge b813689 into 2436e7b

src/Coding.Blog/Server/Configurations/ApplicationLifetimeConfiguration.cs

@@ -0,0 +1,16 @@
+namespace Coding.Blog.Server.Configurations
+{
+    /// <summary>
+    ///     Controls how long the application should stay alive after receiving a SIGTERM
+    ///     signal. This prevents in-flight traffic from being dropped during deployments or
+    ///     application restarts.
+    /// </summary>
+    internal class ApplicationLifetimeConfiguration
+    {
+        public static string Key => "ApplicationLifetime";
+
+        public int ApplicationStoppingGracePeriodSeconds { get; set; }
+
+        public int ApplicationShutdownTimeoutSeconds { get; set; }
+    }
+}

src/Coding.Blog/Server/HostedServices/ApplicationLifetimeService.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Coding.Blog.Server.Configurations;
+using Microsoft.Extensions.Hosting;
+
+namespace Coding.Blog.Server.HostedServices
+{
+    internal class ApplicationLifetimeService : IHostedService
+    {
+        private readonly IHostApplicationLifetime _hostApplicationLifetime;
+        private readonly TimeSpan _applicationStoppingGracePeriod;
+
+        public ApplicationLifetimeService(
+            IHostApplicationLifetime hostApplicationLifetime,
+            ApplicationLifetimeConfiguration configuration)
+        {
+            _hostApplicationLifetime = hostApplicationLifetime;
+            _applicationStoppingGracePeriod = TimeSpan.FromSeconds(configuration.ApplicationStoppingGracePeriodSeconds);
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            _hostApplicationLifetime.ApplicationStopping.Register(() => Thread.Sleep(_applicationStoppingGracePeriod));
+
+            return Task.CompletedTask;
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+    }
+}

src/Coding.Blog/Server/Startup.cs

@@ -1,6 +1,8 @@
 using System;
 using Autofac;
 using Coding.Blog.Server.CompositionRoot;
+using Coding.Blog.Server.Configurations;
+using Coding.Blog.Server.HostedServices;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.HttpOverrides;
@@ -14,7 +16,7 @@ public class Startup
     {
         public Startup(IConfiguration configuration) => Configuration = configuration;
 
-        public IConfiguration Configuration { get; }
+        private IConfiguration Configuration { get; }
 
         // This method gets called by the runtime. Use this method to add services to the container.
         // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
@@ -27,6 +29,18 @@ public void ConfigureServices(IServiceCollection services)
             });
             services.AddControllersWithViews();
             services.AddRazorPages();
+
+            var applicationLifeTimeConfiguration = new ApplicationLifetimeConfiguration();
+
+            Configuration.GetSection(ApplicationLifetimeConfiguration.Key).Bind(applicationLifeTimeConfiguration);
+            services.AddSingleton(applicationLifeTimeConfiguration);
+            services.AddHostedService<ApplicationLifetimeService>();
+
+            services.Configure<HostOptions>(opts =>
+                opts.ShutdownTimeout = TimeSpan.FromSeconds(
+                    applicationLifeTimeConfiguration.ApplicationShutdownTimeoutSeconds
+                )
+            );
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.

src/Coding.Blog/Server/appsettings.Development.json

@@ -1,4 +1,7 @@
 {
+  "ApplicationLifetime": {
+    "ApplicationStoppingGracePeriodSeconds": 3
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",

src/Coding.Blog/Server/appsettings.json

@@ -1,10 +1,14 @@
 {
+  "AllowedHosts": "*",
+  "ApplicationLifetime": {
+    "ApplicationStoppingGracePeriodSeconds": 30,
+    "ApplicationShutdownTimeoutSeconds": 45 
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",
       "Microsoft": "Warning",
       "Microsoft.Hosting.Lifetime": "Information"
     }
-  },
-"AllowedHosts": "*"
+  }
 }