![]()
![]()
Table of Contents
RabbitMQ Essentials
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Support files, eBooks, discount offers and more
Why Subscribe?
Free Access for Packt account holders
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. A Rabbit Springs to Life
What is messaging?
A loosely coupled architecture
Meet AMQP
The RabbitMQ broker
A case for RabbitMQ
Getting RabbitMQ ready
Installing the broker
Installing the management plugin
Configuring users
Summary
2. Creating an Application Inbox
Connecting to RabbitMQ
Working with channels
Building the inbox
Sending user messages
AMQP message structure
Fetching user messages
Seeing it run
Adding topic messages
Summary
3. Switching to Server-push
Moving beyond polling
Consuming queues
Creating a consumer subscription wrapper
Babysitting subscriptions
Tying into the WebSocket endpoint
Running the application
Publishing to all queues
Binding to the fanout
Publishing to all
Running the application
Summary
4. Handling Application Logs
Publishing and consuming logs
Load testing AMQP
Running a load test
Prefetching messages
Messaging serendipity
Summary
5. Tweaking Message Delivery
Handling dead letters
Refactoring queues
Undertaking messages
Making delivery mandatory
Implementing the back-office sender
Summary
6. Smart Message Routing
Service-oriented messaging
Replying to queues
Routing service requests
Exposing the authentication service
Calling the authentication service
Summary
7. Taking RabbitMQ to Production
Tackling the broker SPOF
Mirroring queues
Connecting to the cluster
Federating brokers
Monitoring the broker
Summary
8. Testing and Tracing Applications
Testing RabbitMQ applications
Unit testing RabbitMQ applications
Integration testing RabbitMQ applications
Tracing RabbitMQ
Drinking at the Firehose
Summary
A. Message Schemas
User message
Authentication messages
Login
Request
Response
Logout
Request
Response
Generic error message
Index
![]()
Copyright © 2014 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: April 2014
Production Reference: 1180414
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham B3 2PB, UK.
ISBN 978-1-78398-320-9
www.packtpub.com
![]()
Author
David Dossot
Reviewers
Ken Pratt
Ken Taylor
Ignacio Colomina Torregrosa
HĂ©ctor Veiga
Commissioning Editor
Ashwin Nair
Acquisition Editor
Richard Harvey
Content Development Editor
Govindan K
Technical Editors
Shruti Rawool
Nachiket Vartak
Copy Editors
Aditya Nair
Kirti Pai
Project Coordinator
Puja Shukla
Proofreader
Ameesha Green
Indexer
Monica Ajmera Mehta
Graphics
Sheetal Aute
Ronak Dhruv
Abhinash Sahu
Production Coordinator
Alwin Roy
Cover Work
Alwin Roy
Cover Image
Sheetal Aute
![]()
What gets me most excited about RabbitMQ is that people keep finding new and better ways to use it. Messaging has truly come of age and stands beside databases and web applications as a technology that every professional developer needs to know.
In 2006, when RabbitMQ was born, messaging was mostly used by companies that had way too many IT systems and desperately needed some way to connect them. Jargon words such as "pubsub" and "queue" were strictly for messaging geeks and highly paid integration consultants. But the world was already changing and we were about to find out why.
Today's software and web applications are increasing in scale rapidly. There are more users, apps, devices, places, and ways to connect; this creates a burning need to build more scalable applications. At the same time, these new applications have to integrate with existing systems and services written using any language or API you care to think of. There is only one way to deliver scalability in this kind of environment: use messaging. The best way to do that is via a product such as RabbitMQ.
We started RabbitMQ because there was no messaging tool that was really powerful and dependable, yet easy to get started with. We decided to make one. We hope you like it.
The fun part is designing the tool so that you, the developer, feel like RabbitMQ is actually helping you to build better apps, instead of getting in the way. Your use of the tool should grow with your system.
The hard part is balancing simplicity and power. With RabbitMQ, we think we got this about right. Developers have little tolerance for complexity and nonsense. But beware! There is such a thing as "fake simplicity"; if a tool makes promises that seem too good to be true, then something is almost certainly broken. A truly simple system makes its capabilities obvious when they are needed. RabbitMQ will never lie to you or conceal its true behavior and we think this is essential in a good tool.
In this book, David Dossot has shown how messaging can help anyone architect and design solid scalable apps and how RabbitMQ can deliver on this promise. In 2014, everyone can grok the basics of messaging. Read this book to get started.
Alexis Richardson
Former CEO, Rabbit Technologies Inc.
![]()
David Dossot has worked as a software engineer and an architect for more than 18 years. He has been using RabbitMQ since 2009 in a variety of different contexts. He is the main contributor to the AMQP transport for Mule. His focus is on building distributed and scalable server-side applications for the JVM and the Erlang VM. He is a member of IEEE, the Computer Society, and AOPA, and holds a diploma in Production Systems Engineering from ESSTIN.
He is a co-author for the first and second editions of Mule in Action (Manning Publications Co.). He is a Mule champion and a DZone Most Valuable Blogger. He commits on multiple open source projects and likes to help people on Stack Overflow. He's also a judge for the annual Jolt Awards software competition.
