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  • Book Overview & Buying Apache Maven Cookbook
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Apache Maven Cookbook

Apache Maven Cookbook

By : Raghuram Bharathan
4.2 (5)
Buy this Book
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Apache Maven Cookbook

Apache Maven Cookbook

4.2 (5)
By: Raghuram Bharathan
Buy this Book

Overview of this book

If you are a Java developer or a manager who has experience with Apache Maven and want to extend your knowledge, then this is the ideal book for you. Apache Maven Cookbook is for those who want to learn how Apache Maven can be used for build automation. It is also meant for those familiar with Apache Maven, but want to understand the finer nuances of Maven and solve specific problems.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Sections
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Conventions
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Reader feedback
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Customer support
Free Chapter
1
1. Getting Started
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1. Getting Started
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Introduction
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Installing Maven on Microsoft Windows
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Installing Maven on Mac OS X
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Installing Maven on Linux
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Changing the JDK used by Maven
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Creating a simple project with Maven
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Building a simple project with Maven
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Changing the location of the Maven repository
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Running Maven behind an HTTP proxy server
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Understanding the standard directory layout
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2. IDE Integration with Maven
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2. IDE Integration with Maven
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Introduction
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Creating a new Maven project in Eclipse
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Importing an existing Maven project in Eclipse
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Creating a new Maven project in NetBeans
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Importing an existing Maven project in NetBeans
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Creating a new Maven project in IntelliJ IDEA
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Importing an existing Maven project in IntelliJ IDEA
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3. Maven Lifecycle
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3. Maven Lifecycle
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Introduction
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Understanding the Maven lifecycle, phases, and goals
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Understanding the pom file
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Understanding Maven settings
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Understanding command-line options in Maven
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Understanding Maven profiles
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Adding a new Maven profile
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Activating/deactivating a Maven profile
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Using properties in Maven
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Specifying source encoding for platform-independent builds
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4. Essential Maven Plugins
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4. Essential Maven Plugins
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Introduction
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Using the Maven Clean plugin
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Using the Maven Compiler plugin
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Changing the compiler used by the Maven Compiler plugin
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Specifying the Java version for the Compiler plugin
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Using the Maven Surefire plugin to run unit tests
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Using the Maven Failsafe plugin to run integration tests
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Using the Maven Resources plugin
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Filtering using resources
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Using Eclipse to run Maven goals
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Using NetBeans to run Maven goals
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Using IntelliJ IDEA to run Maven goals
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5. Dependency Management
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5. Dependency Management
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Introduction
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Choosing the scope of dependency
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Getting a report of dependencies
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Getting into dependency and avoiding dependency hell
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Downloading dependencies into a folder
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Understanding SNAPSHOT dependencies
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Handling dependency download errors
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Detecting unused/undeclared dependencies
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Manually installing dependencies that are not available in a repository
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Dependency management using Eclipse
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Dependency management using NetBeans
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Dependency management using IntelliJ IDEA
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6. Code Quality Plugins
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6. Code Quality Plugins
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Introduction
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Analyzing code coverage with the Maven JaCoCo plugin
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Analyzing code coverage with the Maven Cobertura plugin
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Analyzing code with the Maven PMD plugin
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Analyzing code with the Maven Checkstyle plugin
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Analyzing code with the Maven FindBugs plugin
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Generating source references with the Maven JXR plugin
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Analyzing code with the Maven SonarQube plugin
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7. Reporting and Documentation
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7. Reporting and Documentation
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Introduction
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Documenting with the Maven Site plugin
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Generating Javadocs for a site
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Generating source cross-reference for a site
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Generating unit test reports for a site
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Generating code coverage reports for a site
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Generating code quality reports for a site
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Generating selective reports
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Deploying a site
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8. Handling Typical Build Requirements
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8. Handling Typical Build Requirements
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Introduction
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Including and excluding additional resources
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Including and excluding source files and folders
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Configuring Maven to search for plugins
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Working in offline mode
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Controlling the verbosity of the Maven output
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Using the Maven Help plugin
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Using the Maven SCM plugin
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Generating changelogs for a site
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9. Multi-module Projects
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9. Multi-module Projects
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Introduction
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Understanding project inheritance
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Understanding project aggregation
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Combining inheritance and aggregation
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Performing multi-module dependency management
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Performing multi-module plugin management
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Selectively building modules
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Reporting for multi-module projects
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10. Java Development with Maven
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10. Java Development with Maven
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Introduction
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Building a JAR project
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Generating an executable JAR
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Generating a JAR of the source code
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Generating a JAR of the test classes
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Building a WAR project
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Building an EAR project
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Building a pom project
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Running a web project with Jetty
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Running a web project with Tomcat
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11. Advanced Maven Usage
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11. Advanced Maven Usage
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Introduction
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Creating an assembly
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Running a custom executable
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Running an ANT task
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Determining updates to Maven plugin AntRun
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Determining updates to Maven dependencies
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Controlling the constraints
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Generating unique builds
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Releasing a Maven project
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Index
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Index

Getting into dependency and avoiding dependency hell

As you use a number of dependencies, each of them in turn may also include further dependencies. A situation may come when there are multiple versions of the same dependencies in the project. This can often lead to errors.

Getting ready

To understand this, we need to have a fairly complex project that has several transitive dependencies. You can look at one such project at https://github.com/selendroid/demoproject-selendroid.

Clone the repository on your system. Now, we are ready to see how complex dependencies can get.

How to do it...

Use the following steps to avoid dependency hell:

  1. Run the following command:

    mvn dependency:tree -Dverbose

  2. Note the output as shown in the following screenshot:

How it works...

As you can see, in the course of identifying the dependencies to be used in the project, Maven does a dependency analysis. This reveals two things:

  • Two or more dependencies require the same version of another dependency. Maven includes a dependency...

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