Instant Apache Camel Messaging System - Evgeniy Sharapov - E-Book

Instant Apache Camel Messaging System E-Book

Evgeniy Sharapov

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Beschreibung

There are many ways to handle data exchange between applications and systems. Apache Camel is a lightweight integration framework that trades in complexity to focus on simplicity, elegance, and flexibility instead. This book teaches you to handle data exchange using the messaging functions of the Apache Camel framework.

Instant Apache Camel Messaging System is a practical, hands-on guide that provides you with step-by-step instructions which will help you to take advantage of the Apache Camel integration framework using Maven, the Spring Framework, and the TDD approach.

Instant Apache Camel Messaging System introduces you to Apache Camel and provides easy-to-follow instructions on how to set up a Maven-based project and how to use unit tests and mocks to develop your application in a “test first, code later” manner. This book will help you take advantage of modern Java development infrastructures including the Spring Framework, Java DSL, Spring DSL, and Apache Camel to enhance your application.

If you are looking at ways to connect various systems and applications and wondering how to configure data flow in a simple and elegant manner, then Apache Camel is for you, and this book will show you where to begin.

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Seitenzahl: 71

Veröffentlichungsjahr: 2013

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Table of Contents

Instant Apache Camel Messaging System
Credits
About the Author
About the Reviewer
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Why Subscribe?
Free Access for Packt account holders
1. Instant Apache Camel Messaging System
So, what is Apache Camel?
Enterprise Integration Patterns
What Camel can do
Routing
Transformation
Monitoring
Installation
Using a dependency management tool
Step 1 – creating a project
Step 2 – editing the POM file
The manual way
Step 2 – adding JAR files to your classpath
And that's it
Quick start – creating a Camel application
Top 6 features you need to know about
A little bit of terminology
Message
Endpoint
Exchange
Routes and URIs
Leveraging main support
Apache Camel modules
Adding more components
Testing a Camel application
Mocking
Adding Spring
Camel context configuration
Spring support for tests
Making things more complex
Routing
Java DSL
Testing the application
Spring DSL
Modularity with Spring
Using beans
Performing transformations
Transforming between data formats
Transforming with type converters
Transforming data using templates
Enterprise Integration Patterns
People and places you should get to know
Official sites
Books
Blogs

Instant Apache Camel Messaging System

Instant Apache Camel Messaging System

Copyright © 2013 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: September 2013

Production Reference: 1240913

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78216-534-7

www.packtpub.com

Credits

Author

Evgeniy Sharapov

Reviewer

Michal Pasinski

Acquisition Editor

Rubal Kaur

Commissioning Editor

Neil Alexander

Technical Editors

Ruchita Bhansali

Sonali S. Vernekar

Copy Editors

Sayanee Mukherjee

Tanvi Gaitonde

Kirti Pai

Project Coordinator

Michelle Quadros

Proofreader

Ting Baker

Graphics

Yuvraj Mannari

Production Coordinator

Pooja Chiplunkar

Cover Work

Pooja Chiplunkar

Cover Image

Ronak Dhruv

About the Author

Evgeniy Sharapov has been working in the software development field for over 10 years. At the beginning of his career, he wrote software in C and C++ for signals and data processing; he later picked up Java, Python, Ruby, Clojure, and Scala, gradually moving up on the ladder of abstraction levels. For the last few years he has been developing enterprise level applications on Java platform using all sorts of tools and frameworks, such as Spring, Hibernate, iBatis, Drools, JBoss, Webshere, Maven, and Ant, while maintaining interest in fringe software development using Ruby on Rails, TorqueBox, Clojure, and Scala.

I would like to thank my wonderful wife for being supportive, understanding, and patient, and for letting me work on weekends instead of spending time together at the beach.

About the Reviewer

Michal Pasinski is an experienced software developer with great passion for code quality. He has worked mainly with Java technologies but is enthusiastic about other languages, such as JavaScript, Ruby, and Scala.

He believes that being a professional means writing clean code and taking full responsibility for one’s own work. Above all, he also believes that any language, regardless of whether it is a spoken or a programming language, is all about communication between people.

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Chapter 1. Instant Apache Camel Messaging System

Welcome to the Instant Apache Camel Messaging System. This book has been specially created to provide you with all the information that you need to get started using Apache Camel in your Java project. You will learn the basics of Apache Camel, how to add it to your Java project and set up tests for your Camel-based applications, how to use it with the Spring Framework, and how to transform and exchange data between systems.

This document contains the following sections:

So what is Camel? explains what Apache Camel actually is, what you can do with it, and why it would work for your project.

Installation explains how to download and start using Apache Camel in your Java project, either using Maven or by managing dependencies manually.

Quick start – creating a Camel application explains how to create a simple application that uses Apache Camel or add Apache Camel to an already existing application.

Top 6 features you need to know about explains how to set up tests for your application, use the Spring Framework and utilize various Apache Camel modules. By the end of this section, you will be able to route data using Java DSL and Spring DSL, and perform data transformation using converters and templates.

People and places you should get to know provides you with many useful links to the project page and forums, as well as a number of helpful articles, tutorials, and blogs of the Camel core developers.

So, what is Apache Camel?

Apache Camel is an open source integration Java framework that provides a routing and mediation engine API based on its configuration and number of components, which allows a developer to quickly connect various systems consuming or producing data. Apache Camel helps to develop very complex applications by providing re-usable solutions or patterns for solving problems of application integration using message-oriented middleware. These patterns are also called Enterprise Integration Patterns and we briefly describe what they are later in the book.

First, Apache Camel is open source; this means that anyone can try it and see if it meets their needs. For the project manager, this means that there are probably a number of people who know how to work with this framework, so finding a solution or a developer should be easy. For a developer, it means easy access to the source code and the ability to fix things that don't work or get things fixed by someone else who finds the bug first and submits a patch.

Second, Apache Camel, at its core, is comparatively smaller in size than its counterpart and, hence, can be easily explored by going through the source code. For instance, one can easily browse through the existing components just to figure out how to make one's own component.

Third, Apache Camel has a very modular structure. Its core is small, but it comes with a lot of components that range from those working with e-mails to the ones that work as gates to the queues on AS/400 systems. Modularity also allows you to make your own components and weave them effortlessly into the existing infrastructure.

Enterprise Integration Patterns

Enterprise Integration Patterns or EIP are reusable solutions for the organization of communication between applications. At the end of the book, we will provide information about the book that goes by the same title, authored by Gregor Hohpe and Bobby Woolf as well as the website and a community around it.