Microservices - The Practical Way (The Book + Project Code)
Microservices - The Practical Way
About the Book
Moved to Apress
Update. The book is published by Apress under the name: Learn Microservices with Spring Boot.
Please visit my my blog for more information.
This book is a complete guide to building a Microservices Architecture, supported by an application that evolves from a small monolith to a microservice ecosystem. The author follows a very pragmatic approach to explain the benefits of using this type of software architecture, instead of keeping the reader distracted with just theoretical concepts.
A practical, evolving example
This book, in contrast to guides available on the Internet, is based on a realistic, evolving example. Short guides can't focus on the multiple aspects of building microservices, and normally don't fit into more complex scenarios. Besides, trying to combine these short guides to make up a real application means facing a lot of gaps in the big puzzle of microservices.
Guides are too shallow to help you building something real. On the other hand, most books about microservices are sometimes too focused on theory.
Some books are usually on the other side of the spectrum. They explain topics like Domain Driven Design, Event Sourcing, Service Discovery, API Gateway, Centralized Logging, Continuous Deployment, DevOps, Reactive Systems, Circuit-Breaker patterns, etc. But that might be overwhelming: where to start? Is it needed to use all of these concepts in a microservice architecture? How to put them in practice? Those are the questions answered in this book, supported with code examples from the included application.
This book covers some of the state-of-the-art techniques in computer programming, from a practical point of view:
- Microservices with Spring Boot
- Event Driven Architecture and Messaging with RabbitMQ
- RESTful services with Spring
- Service Discovery with Eureka and Load Balancing with Ribbon
- Routing requests with Zuul as your API Gateway
- Test Driven Development: write your tests first
- End to End Tests for an Event Driven Architecture using Cucumber
- Continuous Integration and Deployment
On the other hand, this book also helps the reader to focus on what's important, starting with the Minimum Viable Product but keeping the flexibility to evolve it.
Chapter 1: Introduction
- Setting the scene
- Who are you?
Why is this book different from other books and guides?
- Reasoning behind the technics
- Learning: an incremental process
- Is this a guide or a book?
- From the basics to advanced topics
- Skeleton with Spring Boot, the professional way
- Test-Driven Development
- Connecting microservices
- Event Driven system
- End-to-End testing
Chapter 2: The basic Spring Boot application
Our Business Requirements
The (skeletal) Hello World app
- Creating the skeleton
- Some TDD in action
- Our Business Requirements
Chapter 3: A real 3-tier microservice
3-tier-ing our service
- Completing the basics
- Designing our Domain (and the Business Logic layer)
- Presentation layer (REST API)
- Data layer
- Playing with the application
- 3-tier-ing our service
Chapter 4: Starting with Microservices
- The small monolith approach
- Analyzing our monolith
- Moving forward
- What is Gamification?
- Points, Badges and Leaderboards
- Applying it to our example
Moving to Microservices Architecture
- Why microservices?
- How microservices will interact with each other?
Event Driven Architecture
- Related techniques
- Pros and Cons of Event Driven Architecture
- Further reading
- Applying Event Driven Architecture to our application
Deeper look at the Gamification Service
- Code Overview
- Communication with RabbitMQ
- A great power comes with great responsibility
Chapter 5: The Microservices Journey through tools
Extracting the UI and connecting it to Gamification
- Moving the static content
- Connecting UI with Gamification
- Changes in existing services
- A new, better UI with (almost) no effort
- The current Architecture
Service Discovery, Load Balancers and Routing
- Service Discovery
- Gateway Service
- Hands on code
Circuit Breakers and REST consumers
- Circuit Breaker with Hystrix
- REST consumers with Feign
Chapter 6: Testing our Distributed System
- Setting the scene
- How Cucumber works
Hands on code
- Creating an empty project and choosing our tools
- Making our system testable
- Writing our first Cucumber test
- Linking our feature to Java code
- Reusing steps across Features
- Running our tests and checking the reports
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