Homework 2

TaskHub/Api/Api.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
@@ -12,7 +12,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.2">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

TaskHub/Api/Middleware/ResponseTimeMiddleware.cs.cs

@@ -0,0 +1,28 @@
+using System.Diagnostics;
+
+namespace Api.Middleware
+{
+    public class ResponseTimeMiddleware
+    {
+        private readonly RequestDelegate _next;
+
+        public ResponseTimeMiddleware(RequestDelegate next)
+        {
+            _next = next;
+        }
+
+        public async Task InvokeAsync(HttpContext context)
+        {
+            var stopwatch = Stopwatch.StartNew();
+
+            context.Response.OnStarting(() =>
+            {
+                stopwatch.Stop();
+                context.Response.Headers["X-Response-Time-Ms"] = stopwatch.ElapsedMilliseconds.ToString();
+                return Task.CompletedTask;
+            });
+
+            await _next(context);
+        }
+    }
+}

TaskHub/Api/Middleware/StudentInfoMiddleware.cs

@@ -0,0 +1,24 @@
+namespace Api.Middleware
+{
+    public class StudentInfoMiddleware
+    {
+        private readonly RequestDelegate _next;
+
+        public StudentInfoMiddleware(RequestDelegate next)
+        {
+            _next = next;
+        }
+
+        public async Task InvokeAsync(HttpContext context)
+        {
+            context.Response.OnStarting(() =>
+            {
+                context.Response.Headers["X-Student-Name"] = "Tumashova Marina";
+                context.Response.Headers["X-Student-Group"] = "RI-240912";
+                return Task.CompletedTask;
+            });
+
+            await _next(context);
+        }
+    }
+}

TaskHub/Api/Services/DisposedService.cs

@@ -0,0 +1,18 @@
+namespace Api.Services
+{
+    public abstract class DisposedService : IHasInstanceId, IDisposable
+    {
+        public Guid InstanceId { get; } = Guid.NewGuid();
+
+        protected DisposedService()
+        {
+            Console.WriteLine($"{GetType().Name} CREATED:{InstanceId}");
+        }
+
+        public void Dispose()
+        {
+            Console.WriteLine($"{GetType().Name} DISPOSED: {InstanceId}");
+        }
+    }
+}
+

TaskHub/Api/Services/IHasInstanceId.cs

@@ -0,0 +1,7 @@
+namespace Api.Services
+{
+    public interface IHasInstanceId
+    {
+        Guid InstanceId { get; }
+    }
+}

TaskHub/Api/Services/ServiceProviderExtensions.cs

@@ -0,0 +1,17 @@
+namespace Api.Services
+{
+    public static class ServiceProviderExtensions
+    {
+        public static void CompareServices<T>(this IServiceProvider provider)
+        where T : IHasInstanceId
+        {
+            var first = provider.GetRequiredService<T>();
+            var second = provider.GetRequiredService<T>();
+
+            Console.WriteLine($"Service: {typeof(T).Name}");
+            Console.WriteLine($"First: {first.InstanceId}");
+            Console.WriteLine($"Second: {second.InstanceId}");
+            Console.WriteLine($"Same instance: {ReferenceEquals(first, second)}");
+        }
+    }
+}

TaskHub/Api/Services/Services.cs

@@ -0,0 +1,20 @@
+namespace Api.Services
+{
+    public interface ISingletonService1 : IHasInstanceId { }
+    public interface ISingletonService2 : IHasInstanceId { }
+
+    public interface IScopedService1 : IHasInstanceId { }
+    public interface IScopedService2 : IHasInstanceId { }
+
+    public interface ITransientService1 : IHasInstanceId { }
+    public interface ITransientService2 : IHasInstanceId { }
+
+    public class SingletonService1 : DisposedService, ISingletonService1 { }
+    public class SingletonService2 : DisposedService, ISingletonService2 { }
+
+    public class ScopedService1 : DisposedService, IScopedService1 { }
+    public class ScopedService2 : DisposedService, IScopedService2 { }
+
+    public class TransientService1 : DisposedService, ITransientService1 { }
+    public class TransientService2 : DisposedService, ITransientService2 { }
+}

TaskHub/Api/StartUp.cs

@@ -1,3 +1,5 @@
+using Api.Middleware;
+using Api.Services;
 using Api.UseCases.Users;
 using Api.UseCases.Users.Interfaces;
 using Dal;
@@ -61,6 +63,15 @@ public void ConfigureServices(IServiceCollection services)
                 Version = "v1"
             });
         });
+
+        services.AddSingleton<ISingletonService1, SingletonService1>();
+        services.AddSingleton<ISingletonService2, SingletonService2>();
+
+        services.AddScoped<IScopedService1, ScopedService1>();
+        services.AddScoped<IScopedService2, ScopedService2>();
+
+        services.AddTransient<ITransientService1, TransientService1>();
+        services.AddTransient<ITransientService2, TransientService2>();
     }
 
     /// <summary>
@@ -69,6 +80,38 @@ public void ConfigureServices(IServiceCollection services)
     /// <param name="app">Построитель приложения</param>
     public void Configure(IApplicationBuilder app)
     {
+        using (var scope1 = app.ApplicationServices.CreateScope())
+        {
+            var provider = scope1.ServiceProvider;
+
+            Console.WriteLine("SCOPE 1");
+
+            provider.CompareServices<ISingletonService1>();
+            provider.CompareServices<ISingletonService2>();
+
+            provider.CompareServices<IScopedService1>();
+            provider.CompareServices<IScopedService2>();
+
+            provider.CompareServices<ITransientService1>();
+            provider.CompareServices<ITransientService2>();
+        }
+
+        using (var scope2 = app.ApplicationServices.CreateScope())
+        {
+            var provider = scope2.ServiceProvider;
+
+            Console.WriteLine("SCOPE 2");
+
+            provider.CompareServices<ISingletonService1>();
+            provider.CompareServices<ISingletonService2>();
+
+            provider.CompareServices<IScopedService1>();
+            provider.CompareServices<IScopedService2>();
+
+            provider.CompareServices<ITransientService1>();
+            provider.CompareServices<ITransientService2>();
+        }
+
         if (Environment.IsDevelopment())
         {
             app.UseDeveloperExceptionPage();
@@ -81,6 +124,9 @@ public void Configure(IApplicationBuilder app)
 
         app.UseRouting();
 
+        app.UseMiddleware<ResponseTimeMiddleware>();
+        app.UseMiddleware<StudentInfoMiddleware>();
+
         app.UseEndpoints(endpoints =>
         {
             endpoints.MapControllers();

TaskHub/Dal/Dal.csproj

@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.2" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
   </ItemGroup>
 
   <ItemGroup>

TaskHub/Libs/DatabaseLibrary/DatabaseLibrary.csproj

@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.2" />
-    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.0" />
   </ItemGroup>
 
 </Project>

TaskHub/Libs/LoggingLibrary/LoggingLibrary.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
     <PackageReference Include="Serilog" Version="4.3.0" />
-    <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
+    <PackageReference Include="Serilog.AspNetCore" Version="8.0.0" />
   </ItemGroup>
 
 </Project>

TaskHub/Logic/Logic.csproj

@@ -5,11 +5,11 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.2" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
   </ItemGroup>
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>