Book Image

Spring: Microservices with Spring Boot

By : Ranga Rao Karanam
Book Image

Spring: Microservices with Spring Boot

By: Ranga Rao Karanam

Overview of this book

Microservices helps in decomposing applications into small services and move away from a single monolithic artifact. It helps in building systems that are scalable, flexible, and high resilient. Spring Boot helps in building REST-oriented, production-grade microservices. This book is a quick learning guide on how to build, monitor, and deploy microservices with Spring Boot. You'll be first familiarized with Spring Boot before delving into building microservices. You will learn how to document your microservice with the help of Spring REST docs and Swagger documentation. You will then learn how to secure your microservice with Spring Security and OAuth2. You will deploy your app using a self-contained HTTP server and also learn to monitor a microservice with the help of Spring Boot actuator. This book is ideal for Java developers who knows the basics of Spring programming and want to build microservices with Spring Boot. This book is embedded with useful assessments that will help you revise the concepts you have learned in this book. This book is repurposed for this specific learning experience from material from Packt's Mastering Spring 5.0 by Ranga Rao Karanam.
Table of Contents (7 chapters)

Spring Boot Actuator

When an application is deployed into production:

  • We want to know immediately if some service goes down or is very slow

  • We want to know immediately if any of the servers does not have sufficient free space or memory

This is called application monitoring.

Spring Boot Actuator provides a number of production-ready monitoring features.

We will add Spring Boot Actuator by adding a simple dependency:


As soon as the actuator is added to an application, it enables a number of endpoints. When we start the application, we see a number of added new mappings. The following screenshot shows an extract of these new mappings from the start up log:

The actuator exposes a number of endpoints. The actuator endpoint (http://localhost:8080/application) acts...