var builder = WebApplication.CreateBuilder(new WebApplicationOptions { Args = args, ApplicationName = typeof(Program).Assembly.FullName, ContentRootPath = Directory.GetCurrentDirectory() }); if (builder.Configuration.GetValue<bool>("UseVault", false)) { TokenCredential credential = new ClientSecretCredential( builder.Configuration["Vault:TenantId"], builder.Configuration["Vault:ClientId"], builder.Configuration["Vault:ClientSecret"]); builder.Configuration.AddAzureKeyVault(new Uri($"https://{builder.Configuration["Vault:Name"]}.vault.azure.net/"), credential); } builder.Configuration.SetBasePath(Directory.GetCurrentDirectory()); builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true); builder.Configuration.AddEnvironmentVariables(); builder.WebHost.CaptureStartupErrors(false); builder.Host.UseSerilog(CreateSerilogLogger(builder.Configuration)); builder.Services .AddCustomHealthCheck(builder.Configuration); builder.Services.Configure<PaymentSettings>(builder.Configuration); builder.Services.AddApplicationInsightsTelemetry(builder.Configuration); if (builder.Configuration.GetValue<bool>("AzureServiceBusEnabled")) { builder.Services.AddSingleton<IServiceBusPersisterConnection>(sp => { var serviceBusConnectionString = builder.Configuration["EventBusConnection"]; var subscriptionClientName = builder.Configuration["SubscriptionClientName"]; return new DefaultServiceBusPersisterConnection(serviceBusConnectionString); }); } else { builder.Services.AddSingleton<IRabbitMQPersistentConnection>(sp => { var logger = sp.GetRequiredService<ILogger<DefaultRabbitMQPersistentConnection>>(); var factory = new ConnectionFactory() { HostName = builder.Configuration["EventBusConnection"], DispatchConsumersAsync = true }; if (!string.IsNullOrEmpty(builder.Configuration["EventBusUserName"])) { factory.UserName = builder.Configuration["EventBusUserName"]; } if (!string.IsNullOrEmpty(builder.Configuration["EventBusPassword"])) { factory.Password = builder.Configuration["EventBusPassword"]; } var retryCount = 5; if (!string.IsNullOrEmpty(builder.Configuration["EventBusRetryCount"])) { retryCount = int.Parse(builder.Configuration["EventBusRetryCount"]); } return new DefaultRabbitMQPersistentConnection(factory, logger, retryCount); }); } RegisterEventBus(builder.Services); var app = builder.Build(); if (app.Environment.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler("/Home/Error"); } var pathBase = app.Configuration["PATH_BASE"]; if (!string.IsNullOrEmpty(pathBase)) { app.UsePathBase(pathBase); } ConfigureEventBus(app); app.UseRouting(); app.MapHealthChecks("/hc", new HealthCheckOptions() { Predicate = _ => true, ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse }); app.MapHealthChecks("/liveness", new HealthCheckOptions { Predicate = r => r.Name.Contains("self") }); try { Log.Information("Starting web host ({ApplicationContext})...", Program.AppName); await app.RunAsync(); return 0; } catch (Exception ex) { Log.Fatal(ex, "Program terminated unexpectedly ({ApplicationContext})!", Program.AppName); return 1; } finally { Log.CloseAndFlush(); } void RegisterEventBus(IServiceCollection services) { if (builder.Configuration.GetValue<bool>("AzureServiceBusEnabled")) { services.AddSingleton<IEventBus, EventBusServiceBus>(sp => { var serviceBusPersisterConnection = sp.GetRequiredService<IServiceBusPersisterConnection>(); var logger = sp.GetRequiredService<ILogger<EventBusServiceBus>>(); var eventBusSubcriptionsManager = sp.GetRequiredService<IEventBusSubscriptionsManager>(); string subscriptionName = builder.Configuration["SubscriptionClientName"]; return new EventBusServiceBus(serviceBusPersisterConnection, logger, eventBusSubcriptionsManager, sp, subscriptionName); }); } else { services.AddSingleton<IEventBus, EventBusRabbitMQ>(sp => { var subscriptionClientName = builder.Configuration["SubscriptionClientName"]; var rabbitMQPersistentConnection = sp.GetRequiredService<IRabbitMQPersistentConnection>(); var logger = sp.GetRequiredService<ILogger<EventBusRabbitMQ>>(); var eventBusSubcriptionsManager = sp.GetRequiredService<IEventBusSubscriptionsManager>(); var retryCount = 5; if (!string.IsNullOrEmpty(builder.Configuration["EventBusRetryCount"])) { retryCount = int.Parse(builder.Configuration["EventBusRetryCount"]); } return new EventBusRabbitMQ(rabbitMQPersistentConnection, logger, sp, eventBusSubcriptionsManager, subscriptionClientName, retryCount); }); } services.AddTransient<OrderStatusChangedToStockConfirmedIntegrationEventHandler>(); services.AddSingleton<IEventBusSubscriptionsManager, InMemoryEventBusSubscriptionsManager>(); } void ConfigureEventBus(IApplicationBuilder app) { var eventBus = app.ApplicationServices.GetRequiredService<IEventBus>(); eventBus.Subscribe<OrderStatusChangedToStockConfirmedIntegrationEvent, OrderStatusChangedToStockConfirmedIntegrationEventHandler>(); } Serilog.ILogger CreateSerilogLogger(IConfiguration configuration) { var seqServerUrl = configuration["Serilog:SeqServerUrl"]; var logstashUrl = configuration["Serilog:LogstashgUrl"]; return new LoggerConfiguration() .MinimumLevel.Verbose() .Enrich.WithProperty("ApplicationContext", Program.AppName) .Enrich.FromLogContext() .WriteTo.Console() .WriteTo.Seq(string.IsNullOrWhiteSpace(seqServerUrl) ? "http://seq" : seqServerUrl) .WriteTo.Http(string.IsNullOrWhiteSpace(logstashUrl) ? "http://logstash:8080" : logstashUrl, null) .ReadFrom.Configuration(configuration) .CreateLogger(); } public partial class Program { public static string Namespace = typeof(Program).Assembly.GetName().Name; public static string AppName = Namespace.Substring(Namespace.LastIndexOf('.', Namespace.LastIndexOf('.') - 1) + 1); } public static class CustomExtensionMethods { public static IServiceCollection AddCustomHealthCheck(this IServiceCollection services, IConfiguration configuration) { var hcBuilder = services.AddHealthChecks(); hcBuilder.AddCheck("self", () => HealthCheckResult.Healthy()); if (configuration.GetValue<bool>("AzureServiceBusEnabled")) { hcBuilder .AddAzureServiceBusTopic( configuration["EventBusConnection"], topicName: "eshop_event_bus", name: "payment-servicebus-check", tags: new string[] { "servicebus" }); } else { hcBuilder .AddRabbitMQ( $"amqp://{configuration["EventBusConnection"]}", name: "payment-rabbitmqbus-check", tags: new string[] { "rabbitmqbus" }); } return services; } }