Book Image

Practical Microservices

By : Umesh Ram Sharma
Book Image

Practical Microservices

By: Umesh Ram Sharma

Overview of this book

<p>A microservice architecture helps you build your application as a suite of different services. This approach has been widely adopted as it helps to easily scale up your application with reduced dependencies. This way if a part of your application is corrupted, it can be fixed easily thereby eliminating the possibility of completely shutting down your software. This book will teach you how to leverage Java to build scalable microservices. You will learn the fundamentals of this architecture and how to efficiently implement it practically.</p> <p>We start off with a brief introduction to the microservice architecture and how it fares with the other architectures. The book dives deep into essential microservice components and how to set up seamless communication between two microservice end points. You will create an effective data model and learn different ways to test and deploy a microservices. You will also learn the best way to migrate your software from a monolith to a microservice architecture.</p> <p>Finishing off with monitoring, scaling and troubleshooting, this book will set a solid foundation for you to start implementing microservices.</p>
Table of Contents (17 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Using JWT along with OpenID and OAuth 2.0


JWT stands for JSON web token, which actually has some information related to a particular call. JWT is issued with both authentication and authorization. From a valid JWT token, we can easily identify who is the user and what they can do. Before understanding the structure of JWT, let's get familiar with two other terms: OpenID and OAuth. Nowadays, OAuth 2.0 and OpenID Connect are looked at as an alternative to Security Assertion Markup Language (SAML) for communicating identities and information about a user to identity providers and service or resource providers. OpenID is more for authentication purposes, and OAuth is more for the authorization server. The following section gives more details about these two terms.

OpenID

Jumping to a few years back, every website had its own login mechanism. The user had to maintain credentials for each website separately. The user might use a different email, website, different sites for shopping, traveling,...