Hands-on Hexagonal Architecture With Spring Boot

Hands-on hexagonal architecture with Spring Boot. Hexagonal architecture, or port and adapter architecture, is an architectural pattern used in software design. We will first explain the hexagonal architecture in more detail.

Hexagonal architecture, or port and adapter architecture, is an architectural pattern used in software design. It aims to create systems based on application components that are loosely coupled and can be easily connected to their software environment through ports and adapters. These components are modular and interchangeable, which enhances processing consistency and facilitates test automation.

In this article, we will first explain the hexagonal architecture in more detail, then will create a spring boot application based on this architecture 😀.

Hexagonal architecture

The hexagonal architecture was created by Alistair Cockburn. It allows an application to be equally driven by users, programs, automated tests, or batch scripts, and to be developed and tested in isolation from its possible execution devices and databases.

The principle of the hexagonal architecture is to isolate the domain from any dependency, even a framework dependency.

This allows you to reuse the business domain independently of the change of the technical stack. It will also increase the testability of your domain since you no longer mix it with integration issues.

This architecture makes Adapters easily replaceable.

To allow the outside to interact with the domain, the hexagon provides business interfaces divided into two categories:

• The API gathers all the interfaces for everything that needs to query the domain. These interfaces are implemented by the hexagon.
• The SPI (Service Provider Interface) gathers all the interfaces required by the domain to retrieve information from third parties. These interfaces are defined in the hexagon and implemented by the right side of the infrastructure.

microservices java spring-boot

Learn how to use Spring Boot and JHipster With Reactive Java Microservices. Create a reactive microservices architecture with Spring Boot, Spring Cloud Gateway, Spring Cloud Config, Spring WebFlux, Java, and JHipster.

In the Java world, Spring provides several tools and frameworks to develop microservices, like Spring Boot and Spring Cloud, and in this article, I’ll share a few good courses you can use to learn how to develop microservices using the Spring framework.

These are best online courses to learn Spring Boot, Advanced Java, Docker, React, Microservices, DEvops, and Angular to become full stack Java developer.

In this video you will learn the different types of service discoveries implementations using Netflix Eureka Server, Hashicorp Consul and Apache Zookeeper an...

Learn how to create a Reactive Java Microservices Architecture using Spring Boot and JHipster. Spring Boot 2.0 introduced a new web framework called Spring WebFlux. WebFlux offers a way for developers to do reactive programming. Java has been at the forefront of microservice architectures since they came to prominence a few years ago. It’s a popular language with well-known, high-quality frameworks, like Spring Boot, Spring Cloud, Spring Data, and Spring Security.