Event-driven architecture (EDA)

Modern applications constructed with microservices frequently employ EDA, which makes use of events to trigger and communicate between decoupled services. An event is an update or change in status, such as when a product is added to a shopping cart in an online store.

Let’s now discuss decoupling and loose coupling within EDA.

Decoupling and loose coupling are related but distinct concepts within EDA. Decoupling is a way to eliminate the dependencies between the different components of the system. In the context of the EDA, publishers generate event data without knowing the consumer of the messages. This allows the publisher and consumer to communicate independently without knowing each other.

Loose coupling attempts to lessen the coupling between components (rather than totally separate them) by reducing their level of interdependence. While components in a loosely coupled system may communicate with one another, they do so without developing...