Book Image

Mastering Microservices with Java 9 - Second Edition

Book Image

Mastering Microservices with Java 9 - Second Edition

Overview of this book

Microservices are the next big thing in designing scalable, easy-to-maintain applications. They not only make app development easier, but also offer great flexibility to utilize various resources optimally. If you want to build an enterprise-ready implementation of the microservices architecture, then this is the book for you! Starting off by understanding the core concepts and framework, you will then focus on the high-level design of large software projects. You will gradually move on to setting up the development environment and configuring it before implementing continuous integration to deploy your microservice architecture. Using Spring security, you will secure microservices and test them effectively using REST Java clients and other tools like RxJava 2.0. We'll show you the best patterns, practices and common principles of microservice design and you'll learn to troubleshoot and debug the issues faced during development. We'll show you how to design and implement reactive microservices. Finally, we’ll show you how to migrate a monolithic application to microservices based application. By the end of the book, you will know how to build smaller, lighter, and faster services that can be implemented easily in a production environment.

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Table of Contents (12 chapters)
Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
A Solution Approach
A Solution Approach
Evolution of microservices
Monolithic architecture overview
Limitation of monolithic architecture versus its solution with microservices
Deployment
Summary
2
Setting Up the Development Environment
Setting Up the Development Environment
NetBeans IDE installation and setup
Spring Boot configuration
Sample REST program
Setting up the application build
REST API testing using the Postman Chrome extension
Summary
3
Domain-Driven Design
Domain-Driven Design
Domain-driven design fundamentals
Fundamentals of DDD
Strategic design and principles
Sample domain service
Summary
4
Implementing a Microservice
Implementing a Microservice
OTRS overview
Developing and implementing microservices
Eureka client
Testing
References
Summary
5
Deployment and Testing
Deployment and Testing
Mandatory services for good microservices
An overview of microservice architecture using Netflix OSS
Building and running the OTRS application
Microservice deployment using containers
References
Summary
6
Reactive Microservices
Reactive Microservices
An overview of the reactive microservice architecture
Implementing reactive microservices
References
Summary
7
Securing Microservices
Securing Microservices
Enabling Secure Socket Layer
Authentication and authorization
OAuth implementation using Spring Security
References
Summary
8
Consuming Services Using a Microservice Web Application
Consuming Services Using a Microservice Web Application
AngularJS framework overview
Development of OTRS features
Setting up the web application
References
Summary
9
Best Practices and Common Principles
Best Practices and Common Principles
Overview and mindset
Best practices and principles
Microservices frameworks and tools
References
Summary
10
Troubleshooting Guide
Troubleshooting Guide
Logging and the ELK stack
Use of correlation ID for service calls
Dependencies and versions
References
Summary
11
Migrating a Monolithic Application to Microservice-Based Application
Migrating a Monolithic Application to Microservice-Based Application
Do you need to migrate?
Approaches and keys to successful migration
References
Summary

Securing Microservices

As you know, microservices are the components that we deploy in on-premises or cloud infrastructures. Microservices may offer APIs or web applications. Our sample application, OTRS, offers APIs. This chapter will focus on how to secure these APIs using Spring Security and Spring OAuth2. We'll also focus on OAuth 2.0 fundamentals, using OAuth 2.0 to secure the OTRS APIs. For more understanding on securing REST APIs, you can refer to the RESTful Java Web Services Security, Packt Publishing book. You can also refer to the Spring Security, Packt Publishing video for more information on Spring Security. We'll also learn about cross-origin request site filters and cross-site scripting blockers.

In this chapter, we will cover the following topics:

  • Enabling Secure Socket Layer (SSL)
  • Authentication and authorization
  • OAuth 2.0
...
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