Spring 5.0 Microservices: V, Rajesh R

408 Pages·2017·7.433 MB·English

by  V, Rajesh R

Spring 5.0 Microservices
Second Edition
Build scalable microservices with Reactive Streams, Spring
Boot, Docker, and Mesos
This book is based on Spring Version 5.0 RC1
Rajesh R V
BIRMINGHAM - MUMBAI
Spring 5.0 Microservices
Second Edition
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First published: June 2016
Second edition: July 2017
Production reference: 1120717
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ISBN 978-1-78712-768-5
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Credits
Author Copy Editor
Rajesh R V Zainab Bootwala
Reviewer Project Coordinator
Aditya Abhay Halabe Prajakta Naik
Commissioning Editor Proofreader
Aaron Lazar Safis Editing
Acquisition Editor Indexer
Chaitanya Nair Aishwarya Gangawane
Content Development Editor Graphics
Siddhi Chavan Abhinash Sahu
Technical Editor Production Coordinator
Abhishek Sharma Shraddha Falebhai
About the Author
Rajesh R V is a seasoned IT architect with extensive experience in diversified technologies
and more than 18 years of airline IT experience.
He received a degree in computer engineering from the University of Cochin, India, and he
joined the JEE community during the early days of EJB. During his course as an architect, he
worked on many large-scale, mission-critical projects, including the new generation
Passenger Reservation System (iFly Res) and next generation Cargo Reservation System
(Skychain, CROAMIS) in the Airline domain.
At present, as a chief architect at Emirates, Rajesh handles the solution architecture portfolio
spread across various capabilities, such as JEE, SOA, NoSQL, IoT, cognitive computing,
mobile, UI, and integration. At Emirates, the Open Travel Platform (OTP) architected by
him earned the group the prestigious 2011 Red Hat Innovation Award in the Carved Out
Costs category. In 2011, he introduced the innovative concept of the Honeycomb
architecture based on the hexagonal architecture pattern for transforming the legacy
mainframe system.
Rajesh has a deep passion for technology and architecture. He also holds several
certifications, such as BEA Certified Weblogic Administrator, Sun Certified Java Enterprise
Architect, Open Group Certified TOGAF practitioner, Licensed ZapThink Architect in SOA,
and IASA global CITA-A Certified Architecture Specialist.
He has written Spring Microservices and reviewed Service-Oriented Java Business Integration
by Packt Publishing.
Acknowledgments
I would like to thank everyone at Packt who I've worked closely with to make my dream
come true. Thanks to the reviewers; their in-depth reviews helped improve the quality of
this book.
This book would have never been possible without the encouragement from my excellent
colleagues at Emirates with whom I worked with and learned from. A very special thanks
goes to Neetan Chopra, Senior Vice President, and Thomas Benjamin, CTO, GE Aviation,
for their constant support and help. Special thanks to Daniel Oor and Tomcy John for their
help.
A heartfelt thanks goes to my wife, Saritha, for her tireless and unconditional support that
helped me focus on this book. Thanks to my kids, Nikhil and Aditya. I have taken away a
lot of the time that I'd spend playing with them to write this book. A huge thanks goes to
my father, Ramachandran Nair, and my mother, Vasanthakumari, for their selfless support
that helped me reach where I am today.
About the Reviewer
Aditya Abhay Halabe is a full-stack web application developer at Springer Nature's
technology division. His primary technology stack includes Scala, Java, micro-web services,
NOSQL databases, and multiple frameworks such as Spring, Play, and Angular. He has a
very good understanding of Agile development, with continuous integration, which
includes knowledge of DevOps, Docker, and automated deployment pipelines.
He is passionate about his work and likes to take on new challenges and responsibilities.
Previously, Aditya has worked as a consultant with Oracle, and as a software developer
with John Deere.
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Table of Contents
Preface
1
Chapter 1: Demystifying Microservices
8
Evolution of microservices 8
Business demand as a catalyst for microservices evolution 9
Technology as a catalyst for microservices evolution 12
Imperative architecture evolution 12
What are Microservices? 13
Microservices - The honeycomb analogy 17
Principles of microservices 17
Single responsibility per service 18
Microservices are autonomous 18
Characteristics of microservices 19
Services are first class citizens 19
Characteristics of service in a microservice 20
Microservices are lightweight 21
Microservices with polyglot architecture 22
Automation in microservices environment 23
Microservices with a supporting ecosystem 24
Microservices are distributed and dynamic 24
Antifragility, fail fast, and self healing 26
Microservices examples 27
An example of a holiday portal 27
An example of a travel agent portal 30
Microservices benefits 32
Supports polyglot architecture 32
Enables experimentation and innovation 33
Elastically and selectively scalable 34
Allows substitution 36
Enables to build organic systems 37
Helps managing technology debt 38
Allowing co-existence of different versions 39
Supporting building self-organizing systems 40
Supporting event-driven architecture 41
Enables DevOps 42