Example of the RequestClient usage with MassTransit v3

Program.cs

using System;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using MassTransit;

namespace SimpleConsoleApp
{
    internal class Program
    {
        private static void Main()
        {
            IBusControl busControl = Bus.Factory.CreateUsingInMemory(x =>
            {
                x.UseBsonSerializer();

                x.ReceiveEndpoint("input_queue", e => e.Consumer<CommandConsumer>());
            });

            // create a command client to simplify the request syntax to the consumer
            IRequestClient<SimpleCommand, SimpleCommandResult> commandClient =
                new MessageRequestClient<SimpleCommand, SimpleCommandResult>(busControl,
                    new Uri("loopback://localhost/input_queue"), TimeSpan.FromSeconds(30));

            using (BusHandle handle = busControl.Start().Result)
            {
                Console.WriteLine("Running a bunch of commands...");

                SendManyCommands(commandClient)
                    .Wait(TimeSpan.FromMinutes(1));
            }
        }

        private static async Task SendManyCommands(IRequestClient<SimpleCommand, SimpleCommandResult> client)
        {
            Stopwatch timer = Stopwatch.StartNew();

            // warm up the pipeline
            await client.Request(new SimpleCommand
            {
                CommandId = NewId.NextGuid(),
                Timestamp = DateTime.UtcNow
            });

            int count = 100000;
            await Task.WhenAll(Enumerable.Range(0, count).Select(async x =>
            {
                SimpleCommandResult result = await client.Request(new SimpleCommand
                {
                    CommandId = NewId.NextGuid(),
                    Timestamp = DateTime.UtcNow
                });
            }));

            timer.Stop();

            Console.WriteLine("Time to process {0} messages = {1}", count, timer.ElapsedMilliseconds + "ms");
            Console.WriteLine("Messages per second: {0}", count*2*1000/timer.ElapsedMilliseconds);
        }
    }

    public class CommandConsumer :
        IConsumer<SimpleCommand>
    {
        public Task Consume(ConsumeContext<SimpleCommand> context)
        {
            Stopwatch stopwatch = Stopwatch.StartNew();

            return context.RespondAsync(new SimpleCommandResult
            {
                ResultId = NewId.NextGuid(),
                CommandId = context.Message.CommandId,
                Timestamp = DateTime.UtcNow,
                Duration = stopwatch.Elapsed,
                ResultCode = 200,
                ResultText = "ok",
            });
        }
    }

    public class SimpleCommand
    {
        public Guid CommandId { get; set; }
        public DateTime Timestamp { get; set; }
    }

    public class SimpleCommandResult
    {
        public Guid ResultId { get; set; }
        public Guid CommandId { get; set; }
        public DateTime Timestamp { get; set; }
        public TimeSpan Duration { get; set; }
        public short ResultCode { get; set; }
        public string ResultText { get; set; }
    }
}

Is it possible to work with multiple consumers?
For instance: One consumer can work only with 6 tasks simultaneously, and there are 5 consumers, 4 of them are fully loaded and I want to send SimpleCommand to a free one and get the response from it.

Just like in this example http://masstransit-project.com/MassTransit/usage/request-response.html
But I have multiple Consumers and each of them can take specific amount of tasks if one is busy I need another Consumer take the task and return Answer like "The task is in process"
So this will work like load balancing.