Implementing Domain-Driven Design

Publishing Notifications through Messaging Middleware

Not surprisingly, a messaging middleware product such as RabbitMQ manages details for you that the REST style forces you to deal with on your own. The messaging system also allows you to fairly easily support both Publish-Subscribe and Queues, whichever better fits your needs. In both cases the messaging system uses a push model to send messages of Event notifications to registered subscribers or listeners.

Consider the requirements for publishing Events from our Event Store via a messaging middleware product. We are going to stick with Publish-Subscribe, using what RabbitMQ calls a fanout exchange. We will need a set of components that together do the following in order:

1. Query all Domain ...