Book Image

Maven Essentials

By : Russell E Gold, Prabath Siriwardena
5 (1)
Book Image

Maven Essentials

5 (1)
By: Russell E Gold, Prabath Siriwardena

Overview of this book

Maven is the #1 build tool used by developers and it has been around for more than a decade. Maven stands out among other build tools due to its extremely extensible architecture, which is built on of the concept of convention over configuration. It’s widely used by many open source Java projects under Apache Software Foundation, Sourceforge, Google Code, and more. Maven Essentials is a fast-paced guide to show you the key concepts in Maven and build automation. We get started by introducing you to Maven and exploring its core concepts and architecture. Next, you will learn about and write a Project Object Model (POM) while creating your own Maven project. You will also find out how to create custom archetypes and plugins to establish the most common goals in build automation. After this, you’ll get to know how to design the build to prevent any maintenance nightmares, with proper dependency management. We then explore Maven build lifecycles and Maven assemblies. Finally, you will discover how to apply the best practices when designing a build system to improve developer productivity.

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Maven Essentials
Russell E Gold | Prabath Siriwardena
Dec, 2015 | 184 pages
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Table of Contents (15 chapters)
Maven Essentials
Maven Essentials
Credits
Credits
About the Author
About the Author
Acknowledgments
Acknowledgments
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Apache Maven Quick Start
Apache Maven Quick Start
Installing Apache Maven
Configuring the heap size
Hello Maven!
Convention over configuration
Maven repositories
IDE integration
Troubleshooting
Summary
2
Understanding the Project Object Model (POM)
Understanding the Project Object Model (POM)
Project Object Model (POM)
POM hierarchy
Super POM
POM extending and overriding
Maven coordinates
The parent POM
Managing POM dependencies
Summary
3
Maven Archetypes
Maven Archetypes
Archetype quickstart
Batch mode
Archetype catalogues
The archetype plugin goals
Java EE web applications with the archetype plugin
Android mobile applications with the archetype plugin
EJB archives with the archetype plugin
JIRA plugins with the archetype plugin
Spring MVC applications with the archetype plugin
Summary
4
Maven Plugins
Maven Plugins
Common Maven plugins
Plugin discovery and execution
Summary
5
Build Lifecycles
Build Lifecycles
Standard lifecycles in Maven
Lifecycle bindings
Lifecycle extensions
Summary
6
Maven Assemblies
Maven Assemblies
The assembly plugin
The assembly descriptor
Artifact/resource filtering
Assembly help
A runnable standalone Maven project
Summary
7
Best Practices
Best Practices
Dependency management
Defining a parent module
POM properties
Avoiding repetitive groupIds and versions, and inheriting from the parent POM
Following naming conventions
Think twice before you write your own plugin. You may not need it!
The Maven release plugin
The Maven enforcer plugin
Avoiding the use of unversioned plugins
Descriptive parent POM files
Documentation is your friend
Avoid overriding the default directory structure
Using SNAPSHOT versioning during the development
Get rid of unused dependencies
Avoiding keeping credentials in application POM files
Avoiding using deprecated references
Avoiding repetition – use archetypes
Avoiding using maven.test.skip
Summary
Index
Index

Lifecycle extensions

The lifecycle extensions in Maven allow you to customize the standard build behavior. Let's take a look at the org.apache.maven.AbstractMavenLifecycleParticipant class. A custom lifecycle extension should extend from the AbstractMavenLifecycleParticipant class, which provides the following three methods that you can override:

  • afterProjectsRead(MavenSession session): This method is invoked after all the Maven project instances have been created. There will be one project instance for each POM file. In a large-scale build system, you have one parent POM and it points to multiple child POM files.

  • afterSessionEnd(MavenSession session): This method is invoked after all Maven projects are built.

  • afterSessionStart(MavenSession session): This method is invoked after the MavenSession instance is created.

Let's try out the following example:

package com.packt.lifecycle.ext;

import org.apache.maven.AbstractMavenLifecycleParticipant;
import org.apache.maven.MavenExecutionException...
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