Book Image

Mastering Spring Boot 2.0

By : Dinesh Rajput
Book Image

Mastering Spring Boot 2.0

By: Dinesh Rajput

Overview of this book

Spring is one of the best frameworks on the market for developing web, enterprise, and cloud ready software. Spring Boot simplifies the building of complex software dramatically by reducing the amount of boilerplate code, and by providing production-ready features and a simple deployment model. This book will address the challenges related to power that come with Spring Boot's great configurability and flexibility. You will understand how Spring Boot configuration works under the hood, how to overwrite default configurations, and how to use advanced techniques to prepare Spring Boot applications to work in production. This book will also introduce readers to a relatively new topic in the Spring ecosystem – cloud native patterns, reactive programming, and applications. Get up to speed with microservices with Spring Boot and Spring Cloud. Each chapter aims to solve a specific problem or teach you a useful skillset. By the end of this book, you will be proficient in building and deploying your Spring Boot application.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Implementing API Gateway using Netflix Zuul Proxy


Let's implement routing for your microservice application. We have discussed the importance of routing for API services. In this chapter, we have created two microservices— Account and Customer. Also, we have a Eureka registry application. For example, /api/accounts is mapped to the Account service and /api/customers is mapped to the Customer service.

In this example, we have used Netflix's Zuul API to implement the API Gateway proxy to route API calls. Spring has strong bonding with Netflix Zuul and provides a Spring Cloud Netflix Zuul module. Zuul is a JVM-based router and also used as server-side loadbalancer by Netflix.

Here, we will call both the Account and Customer services by using the Zuul proxy, which can be used to create API Gateway. Also, we have to create another microservice application for API Gateway Edge service.

Let's create a Spring Boot project using the web interface of Spring Initializr (http://start.spring.io/). The application...