SpringBoot-Microservices

PURPOSE: Deep-dive in understanding the structure and concepts of Microservices with the use of the Spring Boot 3.0 framework. Along with other essential libraries used currently in the industry.

Project is an detailed progression through an Udemy Spring Boot tutorial led by Instructor Ramesh Fadatare

• Code is heavily commented throughout to cement the concepts outlined in the hands-on tutorial
• Some viable code is commented out in order to reflect back or differentiate the invocation of competing libraries/dependency code examples

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Concepts covered are as followed:

• Spring Boot API basics
• CRUD REST API with MySQL
• Data Transfer Object (DTO) design pattern
• Mapping Libraries
  • Custom: User Defined
  • Library: Mapstruct
• Exception Handling
  • Controller Level
  • Global Level
• Spring Boot API Validation
• Spring Boot Actuator
• Spring Boot REST API Documentation
  • SpringDoc OpenAPI
  • Annotations
  • Swagger
• Microservices
  • Build: Department & Employee
  • Communication between both Microservices
    • RestTemplate
    • WebClient
    • OpenFeign
  • Microservice Registry:
    • Spring Cloud Netflix Eureka: ability to Load Balance services
  • API Gateway using Spring Cloud
• Spring Cloud Config Server
  • Central location for the registered microservices configuration files within the Eureka Server
  • A separate REPO onto itself located here:
    • Github - SmithKatrinaIT/SpringBoot-Microservices-Config-Server
• Message Brokers: refresh microservices automatically upon configuration changes without restarting the service
  • Spring Cloud Bus: lightweight Message Broker
  • RabbitMQ: Open-source Message Broker.
    • How RabbitMQ works and what it is - YouTube: What is RabbitMQ
    • Docker - RabbitMQ image
• Distributed Tracing [of microservices]
  • Sleuth: not applicable for Spring 3.0
  • Sleuth & Zipkin [UI feature]: - for Spring Boot v2.7 or below
    • Add spring-cloud-starter-sleuth or spring-cloud-starter-sleuth-zipkin dependency
      • Tutorial: Spring Cloud Sleuth & Zipkin
      • Download Zipkin jar file
  • Micrometer [UI feature] For Spring Boot 3: Sleuth-Zipkin was moved to Micrometer
    • This project uses Micrometer and Docker Zipkin Image
    • Follow Micrometer and Zipkin: How to Trace HTTP Requests in Spring Boot 3