214 lines
9.1 KiB
C#
214 lines
9.1 KiB
C#
namespace Microsoft.eShopOnContainers.Services.Catalog.API
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{
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using Autofac;
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using Autofac.Extensions.DependencyInjection;
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using global::Catalog.API.Infrastructure.Filters;
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using global::Catalog.API.IntegrationEvents;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Infrastructure;
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using Microsoft.eShopOnContainers.BuildingBlocks.EventBus;
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using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Abstractions;
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using Microsoft.eShopOnContainers.BuildingBlocks.EventBusRabbitMQ;
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using Microsoft.eShopOnContainers.BuildingBlocks.IntegrationEventLogEF;
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using Microsoft.eShopOnContainers.BuildingBlocks.IntegrationEventLogEF.Services;
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using Microsoft.eShopOnContainers.Services.Catalog.API.Infrastructure;
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using Microsoft.eShopOnContainers.Services.Catalog.API.IntegrationEvents.EventHandling;
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using Microsoft.eShopOnContainers.Services.Catalog.API.IntegrationEvents.Events;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.HealthChecks;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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using Polly;
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using RabbitMQ.Client;
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using System;
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using System.Data.Common;
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using System.Data.SqlClient;
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using System.Reflection;
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using System.Threading.Tasks;
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public class Startup
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{
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public IConfigurationRoot Configuration { get; }
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public Startup(IHostingEnvironment env)
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{
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var builder = new ConfigurationBuilder()
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.SetBasePath(env.ContentRootPath)
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.AddJsonFile($"settings.json", optional: false, reloadOnChange: true)
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.AddJsonFile($"settings.{env.EnvironmentName}.json", optional: true);
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if (env.IsDevelopment())
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{
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builder.AddUserSecrets(typeof(Startup).GetTypeInfo().Assembly);
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}
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builder.AddEnvironmentVariables();
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Configuration = builder.Build();
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}
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public IServiceProvider ConfigureServices(IServiceCollection services)
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{
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// Add framework services.
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services.AddHealthChecks(checks =>
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{
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var minutes = 1;
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if (int.TryParse(Configuration["HealthCheck:Timeout"], out var minutesParsed))
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{
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minutes = minutesParsed;
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}
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checks.AddSqlCheck("CatalogDb", Configuration["ConnectionString"], TimeSpan.FromMinutes(minutes));
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});
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services.AddMvc(options =>
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{
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options.Filters.Add(typeof(HttpGlobalExceptionFilter));
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}).AddControllersAsServices();
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services.AddDbContext<CatalogContext>(options =>
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{
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options.UseSqlServer(Configuration["ConnectionString"],
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sqlServerOptionsAction: sqlOptions =>
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{
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sqlOptions.MigrationsAssembly(typeof(Startup).GetTypeInfo().Assembly.GetName().Name);
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//Configuring Connection Resiliency: https://docs.microsoft.com/en-us/ef/core/miscellaneous/connection-resiliency
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sqlOptions.EnableRetryOnFailure(maxRetryCount: 5, maxRetryDelay: TimeSpan.FromSeconds(30), errorNumbersToAdd: null);
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});
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// Changing default behavior when client evaluation occurs to throw.
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// Default in EF Core would be to log a warning when client evaluation is performed.
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options.ConfigureWarnings(warnings => warnings.Throw(RelationalEventId.QueryClientEvaluationWarning));
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//Check Client vs. Server evaluation: https://docs.microsoft.com/en-us/ef/core/querying/client-eval
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});
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services.Configure<CatalogSettings>(Configuration);
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// Add framework services.
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services.AddSwaggerGen(options =>
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{
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options.DescribeAllEnumsAsStrings();
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options.SwaggerDoc("v1", new Swashbuckle.AspNetCore.Swagger.Info
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{
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Title = "eShopOnContainers - Catalog HTTP API",
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Version = "v1",
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Description = "The Catalog Microservice HTTP API. This is a Data-Driven/CRUD microservice sample",
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TermsOfService = "Terms Of Service"
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});
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});
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services.AddCors(options =>
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{
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options.AddPolicy("CorsPolicy",
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builder => builder.AllowAnyOrigin()
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.AllowAnyMethod()
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.AllowAnyHeader()
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.AllowCredentials());
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});
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services.AddTransient<Func<DbConnection, IIntegrationEventLogService>>(
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sp => (DbConnection c) => new IntegrationEventLogService(c));
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services.AddTransient<ICatalogIntegrationEventService, CatalogIntegrationEventService>();
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services.AddSingleton<IRabbitMQPersistentConnection>(sp =>
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{
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var settings = sp.GetRequiredService<IOptions<CatalogSettings>>().Value;
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var logger = sp.GetRequiredService<ILogger<DefaultRabbitMQPersistentConnection>>();
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var factory = new ConnectionFactory()
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{
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HostName = settings.EventBusConnection
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};
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return new DefaultRabbitMQPersistentConnection(factory, logger);
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});
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RegisterServiceBus(services);
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var container = new ContainerBuilder();
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container.Populate(services);
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return new AutofacServiceProvider(container.Build());
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}
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public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
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{
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//Configure logs
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loggerFactory.AddConsole(Configuration.GetSection("Logging"));
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loggerFactory.AddDebug();
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app.UseCors("CorsPolicy");
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app.UseMvcWithDefaultRoute();
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app.UseSwagger()
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.UseSwaggerUI(c =>
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{
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c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
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});
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var context = (CatalogContext)app
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.ApplicationServices.GetService(typeof(CatalogContext));
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WaitForSqlAvailabilityAsync(context, loggerFactory, app).Wait();
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ConfigureEventBus(app);
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var integrationEventLogContext = new IntegrationEventLogContext(
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new DbContextOptionsBuilder<IntegrationEventLogContext>()
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.UseSqlServer(Configuration["ConnectionString"], b => b.MigrationsAssembly("Catalog.API"))
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.Options);
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integrationEventLogContext.Database.Migrate();
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}
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private async Task WaitForSqlAvailabilityAsync(CatalogContext ctx, ILoggerFactory loggerFactory, IApplicationBuilder app, int retries = 0)
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{
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var logger = loggerFactory.CreateLogger(nameof(Startup));
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var policy = CreatePolicy(retries, logger, nameof (WaitForSqlAvailabilityAsync));
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await policy.ExecuteAsync(async () =>
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{
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await CatalogContextSeed.SeedAsync(app, loggerFactory);
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});
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}
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private Policy CreatePolicy(int retries, ILogger logger, string prefix)
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{
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return Policy.Handle<SqlException>().
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WaitAndRetryAsync(
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retryCount: retries,
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sleepDurationProvider: retry => TimeSpan.FromSeconds(5),
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onRetry: (exception, timeSpan, retry, ctx) =>
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{
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logger.LogTrace($"[{prefix}] Exception {exception.GetType().Name} with message ${exception.Message} detected on attempt {retry} of {retries}");
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}
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);
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}
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private void RegisterServiceBus(IServiceCollection services)
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{
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services.AddSingleton<IEventBusSubscriptionsManager, InMemoryEventBusSubscriptionsManager>();
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services.AddSingleton<IEventBus, EventBusRabbitMQ>();
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services.AddTransient<IIntegrationEventHandler<OrderStatusChangedToAwaitingValidationIntegrationEvent>,
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OrderStatusChangedToAwaitingValidationIntegrationEventHandler>();
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services.AddTransient<IIntegrationEventHandler<OrderStatusChangedToPaidIntegrationEvent>,
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OrderStatusChangedToPaidIntegrationEventHandler>();
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}
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private void ConfigureEventBus(IApplicationBuilder app)
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{
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var eventBus = app.ApplicationServices.GetRequiredService<IEventBus>();
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eventBus.Subscribe<OrderStatusChangedToAwaitingValidationIntegrationEvent,
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IIntegrationEventHandler<OrderStatusChangedToAwaitingValidationIntegrationEvent>>();
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eventBus.Subscribe<OrderStatusChangedToPaidIntegrationEvent,
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IIntegrationEventHandler<OrderStatusChangedToPaidIntegrationEvent>>();
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}
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}
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}
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