MassTransit & Autofac Docs Seem Wrong (or I'm stupid!)

Is this a bug report?

Maybe?! Documentation doesn’t match what I’m seeing

MassTransit 6.1.0 Autofac 5.1.2 MassTransit.Autofac 6.1.0 MassTransit.Azure.ServiceBus.Core 6.1.0

I’m trying to get Autofac registration working using a module as in Official Docs but I get an error cannot resolve symbol for line cfg.AddConsumersFromContainer(context). I also looked at the sample apps on Github and tried using cfg.AddConsumersFromContainer() but it takes in a context and Idon’t know where to get that context from!

Can you also reproduce the problem with the latest version?

Yes

Environment

1. Operating system: Win 10
2. Visual Studio version: 2019 16.4.5
3. Dotnet version: netcoreapp2.2 & netstandard2.0

Steps to Reproduce

First way:

public class MyBusModule : Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            builder.Register(context =>
                {
                    var busControl = Bus.Factory.CreateUsingAzureServiceBus(cfg =>
                    {
                        cfg.Host("connectionString");

                        cfg.AddConsumersFromContainer(context); <----- Cannot find this method

                        cfg.ReceiveEndpoint("queueName", ec =>
                        {
                            ec.ConfigureConsumers(context);
                        });
                    });
                })
                .SingleInstance()
                .As<IBusControl>()
                .As<IBus>();
        }
    }

Second way:

public class MyBusModule : Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            builder.AddMassTransit(cfg =>
            {
                cfg.AddConsumersFromNamespaceContaining<SubmitOrderConsumer>();
                cfg.AddConsumersFromContainer( <WHAT GOES IN HERE > );
            });
        }
    }

Expected Behavior

Compile!! Really though, was expecting either the method AddConsumersFromContainer to be found or some documentation showing where to get the context from in my second way

Actual Behavior

Reproducible Demo

    {
        protected override void Load(ContainerBuilder builder)
        {
            builder.AddMassTransit(cfg =>
            {
                cfg.AddConsumersFromContainer();
            });

            builder.Register(context =>
                {
                    var busControl = Bus.Factory.CreateUsingAzureServiceBus(cfg =>
                    {
                        cfg.Host("connectionString");

                        cfg.AddConsumersFromContainer(context);

                        cfg.ReceiveEndpoint("queueName", ec =>
                        {
                            ec.ConfigureConsumers(context);
                        });
                    });
                })
                .SingleInstance()
                .As<IBusControl>()
                .As<IBus>();
        }
    }

[matt-lethargic]

I think there was just a couple of things

• The Autofac Example on your site using modules has methods such as cfg.AddConsumersFromContainer(context); just doesn’t exist and by what you’ve said above is best left alone!
• x.AddConsumer<> & x.AddConsumers actually registers the consumers with the container, I didn’t get this for a while
• AddMassTransit is the way to go, don’t try yourself!
• Only Autofac mentions Saga Repositories, I’m going to have to figure out Simple Injector and Microsoft IoC myself
• One thing that could be useful. I’m building lots of microservices and they all need to send events for state transfer, keeping remote data updated from the source of truth. It would be great to have some sort of reference example for how this would work or could be setup. I’m sure this is a common thing these days. Excuse me if this is explained, I’ve only read about half the docs

Think that was it really. Otherwise thanks for MassTransit 😃

[phatboyg]

So, I kind of feel like you’re off in left field, and I’m not sure how you got there.

The very first example for Autofac works perfectly.

https://masstransit-project.com/usage/containers/autofac.html#using-nested-container

But to be clear, you only need to add your consumers one way, within the AddMassTransit call. And you only need to call one of the (ConfigureConsumer) methods, or just call COnfigureEndpoints and conventions are used to name the queues.

I’m not sure about the Module usage, because, honestly, that’s something I haven’t used in probably 5-7 years. I get the value, but I’m not sure how it works.