Event bus communication is composed of two parts: the sender and the receiver. In the case of an event, the actors' names are publishers and subscribers. The previous section described the implementation of the subscriber part. In this case, the catalog service will be the publisher and the cart service will be the subscriber. Before we look at how to implement the publisher part, we need to create a RabbitMQ instance using a Docker container by adding a docker-compose.yml file to the catalog service:
version: "3.7"services: ... catalog_esb: container_name: catalog_esb image: rabbitmq:3-management-alpine ports: - 5672:5672 - 15672:15672 networks: - my_network ...networks: my_network ...
