The .Net Core demo project scaled up with RabbitMQ and MassTransit
A quick tutorial on the project files and projects
In the Startup.cs, firstly, the bus is initialized, registered and started using the properties fetched from appsettings.json:
var bus = BusConfigurator.ConfigureBus((cfg, host) =>
{
//This receiver is fired when a response is created from CreateUserCommandConsumer
cfg.ReceiveEndpoint(host, RabbitMqConfiguration.OAuthServiceQueue, e =>
{
});
});
//Registration of the bus
services.AddSingleton<IPublishEndpoint>(bus);
services.AddSingleton<ISendEndpointProvider>(bus);
services.AddSingleton<IBus>(bus);
bus.StartAsync();
Next, a UserController is set to request a CreateUserCommand to the receiver. Befre making the request, the RequestClient is created using the BusConfigurator.CreateRequestClient.
When a request is created, it is time for the receiver to process the request and respond. In the Program.cs, the bus is configured with the same propoerties as in Startup.cs.
Next, a consumer is designed named CreateUserCommandConsumer responsible for processing the ICreateUserCommand.
After processing the command, an event is raised named ICreateUserEvent to the requester.
Before running the solution, make sure to have RabbitMQ installed. After running its Management plugin, it will be launched on port 15672 by default.
Next, after running the solution, both projects (Requester and Receiver are run together) start their work. Each project make an Exchange and a Queue in the RabbitMQ. Inaddition, two other Exchanges are created, one for the ICreateUserCommand and the other one for the oauth.service along with its Queue.
When making an API call to the CreateUser action with some parameter like
{
"email": "behzadrezaie11@gmail.com"
}
the message will go through the exchanges and queues to reach the CreateUserCommandConsumer. Next, the result will be led to the requester.