Book Image

Spring 5.0 Microservices - Second Edition

By : Rajesh R V
Book Image

Spring 5.0 Microservices - Second Edition

By: Rajesh R V

Overview of this book

The Spring Framework is an application framework and inversion of the control container for the Java platform. The framework’s core features can be used by any Java application, but there are extensions to build web applications on top of the Java EE platform. This book will help you implement the microservice architecture in Spring Framework, Spring Boot, and Spring Cloud. Written to the latest specifications of Spring that focuses on Reactive Programming, you’ll be able to build modern, internet-scale Java applications in no time. The book starts off with guidelines to implement responsive microservices at scale. Next, you will understand how Spring Boot is used to deploy serverless autonomous services by removing the need to have a heavyweight application server. Later, you’ll learn how to go further by deploying your microservices to Docker and managing them with Mesos. By the end of the book, you will have gained more clarity on the implementation of microservices using Spring Framework and will be able to use them in internet-scale deployments through real-world examples.
Table of Contents (11 chapters)

Microservices and containers


There is no direct relationship between microservices and containers. Microservices can run without containers and containers can run monolithic applications. However, there is a sweet spot between microservices and containers.

Containers are good for monolithic applications; however, the complexities and the size of the monolith application may kill some of the benefits of containers. For example, spinning new containers quickly may not be easy with monolithic applications. In addition to that, monolithic applications generally have local environment dependencies, such as local disk, stove pipe dependencies with other systems, and more. Such applications are difficult to manage with container technologies. This is where microservices go hand in hand with containers.

The following diagram shows three polyglot microservices running on the same host machine and sharing the same operating system, but abstracts the runtime environment:

The real advantage of containers...