Polly8Study/Polly8Study.WebApi/Program.cs

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

using Polly8Study.WebApi.Filters;

namespace Polly8Study.WebApi
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var builder = WebApplication.CreateBuilder(args);

            // Add services to the container.

            builder.Services.AddControllers(option => 
            {
                option.Filters.Add<OperationCancelledExceptionFilter>();
            });
            // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
            builder.Services.AddEndpointsApiExplorer();
            builder.Services.AddSwaggerGen();

            //builder.Services.AddSingleton<IAsyncExceptionFilter>(new OperationCancelledExceptionFilter);

            builder.Services.Configure<MvcOptions>(mvcOptions =>
            {
                mvcOptions.Filters.Add<OperationCancelledExceptionFilter>();
            });

            var app = builder.Build();

            // Configure the HTTP request pipeline.
            if (app.Environment.IsDevelopment())
            {
                app.UseSwagger();
                app.UseSwaggerUI();
            }

            app.UseAuthorization();


            app.MapControllers();

            app.Run();
        }
    }
}