2017-06-12 13:52:23 +02:00

214 lines
9.1 KiB
C#

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