How to register a consumer to multiple endpoints in MassTransit?

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To register a consumer to multiple endpoints in MassTransit, you can use the bus factory method called CreateUsingRabbitMq. This method creates a bus instance using RabbitMQ as the transport and allows you to register consumers to multiple endpoints by specifying each endpoint as a separate receive endpoint.

Here's an example code snippet:

var bus = Bus.Factory.CreateUsingRabbitMq(cfg =>
{
    cfg.Host(new Uri("rabbitmq://localhost/"), h =>
    {
        h.Username("guest");
        h.Password("guest");
    });

    cfg.ReceiveEndpoint("queue1", ep =>
    {
        ep.Handler<MyMessage>(context => Task.CompletedTask);
    });

    cfg.ReceiveEndpoint("queue2", ep =>
    {
        ep.Handler<MyMessage>(context => Task.CompletedTask);
    });

});

bus.Start();

//...

bus.Stop();

In this example, we create a bus instance using RabbitMQ as the transport and register two receive endpoints (queue1 and queue2). Both endpoints handle the same message type (MyMessage) and execute the same handler logic (Task.CompletedTask).

With this configuration, any message of type MyMessage received on either endpoint will be handled by the specified handler.

Note that you can register as many endpoints as needed, and each endpoint can have its own handler logic for different message types.