public When_using_EntityFrameworkConcurrencyFail()
{
_sagaDbContextFactory = new DelegateSagaDbContextFactory <ChoirStateOptimistic>(
() => new SagaDbContext <ChoirStateOptimistic, EntityFrameworkChoirStateMap>(SagaDbContextFactoryProvider.GetLocalDbConnectionString()));
_repository = new Lazy <ISagaRepository <ChoirStateOptimistic> >(() => EntityFrameworkSagaRepository <ChoirStateOptimistic> .CreateOptimistic(_sagaDbContextFactory));
}
public static void ConfigureBus(HostBuilderContext context, IServiceCollection services)
{
services.AddMassTransit(config =>
{
config.AddBus(provider => Bus.Factory.CreateUsingRabbitMq(cfg =>
{
var busConfig = context.Configuration.GetSection("Bus");
var host = cfg.ConfigureHost(busConfig);
var connectionString = provider.GetRequiredService <IConfiguration>()["SagaStoreConnection"];
var optionsBuilder = new DbContextOptionsBuilder <SagaDbContext <SagaInstance, SagaInstanceMap> >();
optionsBuilder.UseSqlServer(connectionString, options => options.CommandTimeout(5));
DbContext contextFactory() => new SagaDbContext <SagaInstance, SagaInstanceMap>(optionsBuilder.Options);
var repository = EntityFrameworkSagaRepository <SagaInstance> .CreateOptimistic(contextFactory);
cfg.ReceiveEndpoint(host, "OrderWorkflow", e =>
{
e.UseRetry(x =>
{
x.Handle <DbUpdateConcurrencyException>();
// This is the SQLServer error code for duplicate key, if you are using another Relational Db, the code might be different
x.Handle <DbUpdateException>(y => y.InnerException is SqlException ex && ex.Number == 2627);
x.Interval(5, TimeSpan.FromMilliseconds(100));
});
e.UseFilter(new OperationContextFilter());
e.StateMachineSaga(new OrderSaga(provider.GetRequiredService <ILogger <OrderSaga> >()), repository);
});
EndpointConvention.Map <CompleteOrder>(new Uri(new Uri(busConfig["Host"]), nameof(CompleteOrder)));
EndpointConvention.Map <FailOrder>(new Uri(new Uri(busConfig["Host"]), nameof(FailOrder)));
EndpointConvention.Map <Delivery.Commands.PlaceOrder>(new Uri(new Uri(busConfig["Host"]), "CreateDelivery"));
contextFactory().Database.EnsureCreated();
}));
});
services.AddSingleton <IHostedService, BusService>();
}
public static void AddMassTransitWithRabbitMq(this IServiceCollection services, IConfiguration appConfig)
{
if (services == null)
{
throw new ArgumentNullException("services");
}
if (appConfig == null)
{
throw new ArgumentNullException("appConfig");
}
var cfgSection = appConfig.GetSection("RabbitMqHost");
if (!cfgSection.Exists())
{
throw new InvalidOperationException("Appsettings: 'RabbitMqHost' section is not found");
}
services.Configure <RabbitMqHostOptions>(cfgSection);
var epSection = appConfig.GetSection("MqEndpoints");
if (!epSection.Exists())
{
throw new InvalidOperationException("Appsettings: 'MqEndpoints' section was not found");
}
services.Configure <MqEndpointOptions>(epSection);
services.AddMassTransit(cfg =>
{
cfg.AddConsumer <RoutingSlipMetricsConsumer>();
cfg.AddConsumer <RoutingSlipActivityConsumer>();
cfg.AddSaga <RoutingSlipState>();
});
services.AddSingleton <RoutingSlipStateMachine>();
services.AddSingleton(svcProv =>
{
var fact = svcProv.GetService <ILoggerFactory>();
return(new RoutingSlipMetrics("Routing Slip", fact.CreateLogger <RoutingSlipMetrics>()));
});
services.AddSingleton <ValidateActivityMatrics>();
services.AddScoped <RoutingSlipMetricsConsumer>(svcProv =>
{
var metrics = svcProv.GetService <RoutingSlipMetrics>();
return(new RoutingSlipMetricsConsumer(metrics));
});
services.AddScoped(svcProv =>
{
var metrics = svcProv.GetService <ValidateActivityMatrics>();
var epOpts = svcProv.GetService <IOptions <MqEndpointOptions> >().Value;
return(new RoutingSlipActivityConsumer(metrics, epOpts.ActivityMetrics.ActivityName));
});
services.AddSingleton(svcProv =>
{
var config = svcProv.GetService <IConfiguration>();
var conStr = config.GetConnectionString("EfCoreRoutingSlip");
return(new RoutingSlipDbContextFactory(conStr));
});
services.AddSingleton <ISagaRepository <RoutingSlipState>, EntityFrameworkSagaRepository <RoutingSlipState> >(svcProv =>
{
var ctxFactory = svcProv.GetService <RoutingSlipDbContextFactory>();
return(EntityFrameworkSagaRepository <RoutingSlipState> .CreateOptimistic(() => ctxFactory.CreateDbContext(Array.Empty <string>())));
});
services.AddSingleton(svcProv =>
{
var hostOpts = svcProv.GetService <IOptions <RabbitMqHostOptions> >().Value;
var epOpts = svcProv.GetService <IOptions <MqEndpointOptions> >().Value;
var machine = svcProv.GetService <RoutingSlipStateMachine>();
var repository = svcProv.GetService <ISagaRepository <RoutingSlipState> >();
return(Bus.Factory.CreateUsingRabbitMq(cfg =>
{
var host = cfg.CreateHost(hostOpts);
cfg.ReceiveEndpoint(host, epOpts.Metrics.QueueName, e =>
{
e.PrefetchCount = epOpts.Metrics.PrefetchCount;
e.UseRetry(r => r.None());
//e.LoadFrom(svcProv);
e.Consumer <RoutingSlipMetricsConsumer>(svcProv);
e.Consumer <RoutingSlipActivityConsumer>(svcProv);
});
cfg.ReceiveEndpoint(host, epOpts.ActivityMetrics.QueueName, e =>
{
e.PrefetchCount = epOpts.ActivityMetrics.PrefetchCount;
e.UseRetry(r => r.None());
});
cfg.ReceiveEndpoint(host, epOpts.Saga.QueueName, e =>
{
e.UseInMemoryOutbox();
e.PrefetchCount = 1;
e.UseConcurrencyLimit(1);
e.StateMachineSaga(machine, repository);
});
cfg.UseSerilog();
}));
});
}
