MassTransit请求/响应在微服务体系结构中是否需要通用的.dll?

时间:2018-08-01 05:59:52

标签: .net-core rabbitmq masstransit

我将在Request / Response模式下使用RabbitMQ和MassTransit在.Net Core中实现我的应用。

这是接收方的代码(它接收用户名和密码,然后将用户名和提供者密钥发送给客户端):

//BusConfiguration.cs

public static IBusControl ConfigureBus(
        Action<IRabbitMqBusFactoryConfigurator, IRabbitMqHost> registrationAction = null)
    {
        return Bus.Factory.CreateUsingRabbitMq(cfg =>
        {
            var host = cfg.Host(new Uri(RabbitMqConstants.RabbitMqUri), hst =>
            {
                hst.Username(RabbitMqConstants.UserName);
                hst.Password(RabbitMqConstants.Password);
            });

            registrationAction?.Invoke(cfg, host);
        });
    }

public void ConfigureBus()
    {
        bus = BusConfigurator.ConfigureBus((cfg, host) =>
        {
            cfg.ReceiveEndpoint(host, RabbitMqConstants.OAuth2ServiceQueue, e =>
            {
                e.Consumer<CreateUserCommandConsumer>();
            });
        });

        TaskUtil.Await(() => bus.StartAsync());
    }


//CreateUserCommandConsumer.cs
public class CreateUserCommandConsumer : IConsumer<ICreateUserCommand>
{
    public async Task Consume(ConsumeContext<ICreateUserCommand> context)
    {
        await context.RespondAsync<IUserCreatedEvent>(new
        {
            UserName = context.Message.UserName,
            ProviderKey = "q1w2e3d3r"

        });
    }
}

命令和事件类如下:

 //ICreateUserCommand.cs
namespace WebHost.My.ServiceBus.Messages
{
    public interface ICreateUserCommand
    {
        string UserName { get; set; }
        string Password { get; set; }
    }
}

//IUserCreatedEvent.cs
namespace WebHost.My.ServiceBus.Messages.CreateUser
{
    public interface IUserCreatedEvent
    {
        string UserName { get; set; }
        string ProviderKey { get; set; }
    }
}

这是我的客户端的代码(发送用户创建请求):

        var bus = BusConfigurator.ConfigureBus((cfg, host) =>
        {
            cfg.ReceiveEndpoint(host, "profile.test.service", e =>
            {
            });
        });

        TaskUtil.Await(() => bus.StartAsync());

        try
        {
            IRequestClient<ICreateUserCommand, IUserCreatedEvent> client = CreateRequestClient(bus);

            var userName = "username";
            var password = "password";

            Task.Run(async () =>
            {
                var response = await client.Request(new CreateUserCommand()
                {
                    UserName = userName,
                    Password = password
                });

                Console.WriteLine("User Provider key: {0}", response.ProviderKey);
                Console.WriteLine("User Username: {0}", response.UserName);
            }).Wait();
        }
        catch (Exception ex)
        {
            Console.WriteLine("Exception!!! OMG!!! {0}", ex);
        }
        finally
        {
            bus.Stop();
        }
    }
    static IRequestClient<ICreateUserCommand, IUserCreatedEvent> CreateRequestClient(IBusControl busControl)
    {
        var serviceAddress = new Uri(RabbitMqConstants.RabbitMqUri + RabbitMqConstants.OAuth2ServiceQueue);
        var client =
            busControl.CreateRequestClient<ICreateUserCommand, IUserCreatedEvent>(serviceAddress, TimeSpan.FromSeconds(60), TimeSpan.FromSeconds(60));

        return client;
    }

重点是,这两个方面(请求方和响应方)是不同的项目,没有.ddl相同。换句话说,它们不共享IUserCreatedEvent和ICreateUserCommand接口。运行服务器代码(响应者)时,它将创建一个名为“ WebHost.My.ServiceBus.Messages:ICreateUserCommand”的交换,该交换是名称空间和接口名称的组合。由于我的客户端代码中没有这样的名称空间,因此当响应者发送提供程序密钥和用户名时,消息将转到_skipped交换,而我无法获得响应。

据我搜索和了解,Command和Event接口必须在两个项目(请求者和响应者)之间共享,但是由于我是基于基于API的项目进行编码的,所以我不希望它们共享名称空间! 如何克服MassTransit中的此类限制?

非常感谢

0 个答案:

没有答案