MassTransit

# Getting Started

Getting started with MassTransit is fast and easy.

# Pre-Requisites

# Select your transport:

  • In Memory: A dependency free way to get started, but not for production use
  • RabbitMQ: A high performance transport that allows both cloud based and local development
  • Azure Service Bus: Use the power of Azure
  • SQS: Use the power of AWS

# What are we going to build?

Each example goes through complete process of creating a messaging based system. We will configure the HostBuilder to use MassTransit, we will create a message, a consumer of that message.

Next up, the AddMassTransit extension is used to configure the bus in the container. The UsingInMemory (and UsingRabbitMq) method specifies the transport to use for the bus. Each transport has its own UsingXxx method.

# Quick note on terminology

A message in MassTransit is just a Plain Old CLR Object or POCO for short. In MassTransit this can be a class, an interface, or a record. Records are currently recommended when using .NET 5 or greater.

A consumer is a .NET class that implements IConsumer<TMessage> for one or more message types and is similar to an ASP.NET controller . Consumers are registered using the AddConsumer method within the AddMassTransit service collection extension method. Consumers are added by MassTransit to the underlying service collection as scoped.

# Let's Get Started

If you aren't sure which transport you are going to want to use yet, we'd recommend trying the in-memory! It has no dependencies and can easily be upgraded to another transport thanks to MassTransit's abstractions.