RequestTimeoutException in Request/Response scenario - rabbitmq

Question

Trying to implement a request/response scenario with MassTransit.RabbitMQ version 4.0.1.1378-develop, a ASP.NET Core 2 Web application and a .NET Core 2 Console Project.
Below is the code that creates bus and request client in my ASP.NET Core 2.0 application:
var bus = Bus.Factory.CreateUsingRabbitMq(sbc =>
sbc.Host(new Uri("rabbitmq://localhost"), h =>
{
h.Username("guest");
h.Password("guest");
})
);
services.AddSingleton<IPublishEndpoint>(bus);
services.AddSingleton<IBusControl>(bus);
var requestTimeout = TimeSpan.FromSeconds(10);
var address = new Uri("rabbitmq://localhost/myqueue");
services.AddScoped<IRequestClient<SubmitOrder, OrderSubmitResult>>(ctx => new MessageRequestClient<SubmitOrder, OrderSubmitResult>(bus, address, requestTimeout));
Then using the IRequestClient<SubmitOrder, OrderSubmitResult> that's been injected into my controller, I send the request as below:
private readonly IRequestClient<SubmitOrder, OrderSubmitResult> _client;
public async Task<ActionResult> SendRequest(string id)
{
var result = await _client.Request(new SubmitOrder());
...
}
Finally, the ways I have tried to send response to the client:
var bus = Bus.Factory.CreateUsingRabbitMq(cfg =>
{
var host = cfg.Host(new Uri("rabbitmq://localhost"), h =>
{
h.Username("guest");
h.Password("guest");
});
cfg.ReceiveEndpoint(host, "myqueue", ep =>
{
ep.Handler<SubmitOrder>(context => context.RespondAsync(new OrderSubmitResult()));
// async version
//ep.Handler<SubmitOrder>(async context =>
//{
// await context.RespondAsync(new OrderSubmitResult());
//});
// with a Consumer
//ep.Consumer<SubmitOrderConsumer>();
// with a single Consumer
//ep.Instance(new SubmitOrderConsumer());
});
});
bus.Start();
I get the request in my Bus, and send appropriate response. But I always get RequestTimeoutException in the client side and none of the above approaches worked.
Update:
Code is OK. I forgot to start the bus (bus.start) on client side :/
#Chris: Thanks for adding a full working sample in a short time. I suggest adding services.AddSingleton<IBusControl>(bus); and then change Startup.cs's Configure method to below:
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IApplicationLifetime applicationLifetime, IBusControl bus)
{
applicationLifetime.ApplicationStopping.Register(() => bus.Stop(TimeSpan.FromSeconds(10)));
....
To handle a graceful shutdown.

Answer 1

I've built a sample to show how to do this properly, including the use of ASP.NET Core 2, both a Web Application and a Console Application.
https://github.com/MassTransit/Sample-DotNetCore-Request
Enjoy!