Think service, not server
In the previous section, you learned about loose coupling and how important it is for our architecture to be loosely coupled for scalability and fault tolerance. Developing service-oriented thinking will help to achieve a loosely coupled architecture (as opposed to server-oriented thinking, which can lead to hardware dependency and a tightly coupled architecture). Microservice-based event-driven architecture helps us to achieve ease of deployment and maintenance for our solution design.
In a RESTful architecture, you can format a message in XML, JSON, or plain text and send it over Internet using a simple HTTP protocol. RESTful architecture is popular as it is very lightweight. Microservices are based on RESTful architecture and are independently scalable, which makes it easier to expand or shrink one component of your application without impacting others.
As you can see in the following diagram, in a monolithic architecture, all components are built...
