Kurs om
Maven

Introduction

Course and topic introduction and overview

Background and Overview

Inventor and why Maven was created

How to build a Java application

Or, why do we need a build tool?

• Compiling a single Java file
• Compiling several Java classes
• Separation of sources from build output
• Understanding the class-path
• Creating a JAR file
• Brief about the JAR Manifest file
• Using external libraries
• What is an Application JAR?
• Generate documentation
• Writing unit tests
• Running unit tests
• Understand transitive dependencies

Brief about Java Build Tools

• Ant
• Maven
• Ivy
• Gradle

Maven Fundamentals

The most essential things you need to know regarding Maven

Installation

• Different ways of installing Maven
• Installing SDKMan
• Install mvn using sdkman
• Creating a Hello Maven project
• Installing Maven Wrapper
• Using mvn vs. mvnw
• Configure proxy settings

Concepts

• Standardized project layout
• The POM and its structure
• Important POM elements
• Standardized build commands
• Plugins
• Plugin goals
• The Maven build life-cycle
• Local settings
• Archetypes
• Building our demo application using Maven

Building Java Programs

• Overview of the steps
• Setting Java options
• Passing compiler options, not directly supported by the compiler plugin
• Resources
• Creating JAR files

Dependencies

• What is a dependency
• Understanding the concept artefact repository
• What is transitive dependency
• How to search for 3rd party libraries (JARs)
• Maven coordinates
• Configuring dependencies
• Scopes

Maven Usage

Typical use cases when working with Maven powered builds

Unit Tests

• Setting up test source directories
• Understand the Surefire plugin
• Using JUnit 5 as the testing framework
• Loading resource files from the class path
• Running tests
• Suppressing tests

Building Java Applications

• Making a JAR executable
• Dealing with dependencies
• Unpacking using the Dependency plugin
• Creating bundles with the Assembly plugin
• Creating an executable Application JAR

Building Web Applications

• Web app directory structure
• Web POM
• Building WAR artefacts
• Running a WAR file

Reports

• Generate Javadoc for the project
• Using user-defined java-doc tags
• Generate a report based on the results of unit tests
• Generate code coverage reports
• Generate a source cross-reference
• Generate standard project reports
• Generate a PMD report

Using the Site Plugin

• Directory content
• Site descriptor
• Generating a site
• Reports
• Report plugins
• Markup formats for user written pages
• Providing assets, such as CSS and images

Integration Tests

• Using the Failsafe plugin
• Running integration tests
• Using Spock as the testing framework

Toolchains

• What is a Java toolchain
• Using the Toolchain plugin
• Using standard JDK toolchains
• Creating a custom toolchain

Multi-Module Projects

How to work with several Maven projects providing separate artefacts for a large application

Understanding a multi-module project

• The single project artefact principle
• How it differs from a single-module project
• Parent POM
• Child POM
• Running recursive Maven build commands
• Module dependencies

More about working with multi-module projects

• The Flatten plugin
• The Enforcer plugin
• Understanding Maven BOM (Bill of Materials)

Java Monorepo

• What is a monorepo
• Structure of a multi-module monorepo project
• Building an API module
• Building a library module
• Building a web module
• Building an application module

Using Maven for Spring Boot

• What are Spring Framework and Spring Boot
• Using the Spring Initializr
• Spring dependencies and starter dependencies
• Spring Boot Fat JAR

Maven Proxy and Repository Servers

How to work with internal repositories

Maven Repositories

• What is a Maven repository, really?
• Configuration and settings
• Common public repositories
• The local Maven cache
• Installing JARs to the local cache and why it is useful
• Using non-standard repositories
• Mirrors
• Configure credentials

Deployment

• What is a Maven deployment
• Deploy to cloud Maven repo
• Configuration

Maven Servers

• Overview of Maven servers
• Installation of Nexus
• Installation of Artifactory
• Deployment to an in-house Maven server

The Release Plugin

• The release process
• Supply chain management
• Release prepare and perform
• Release rollback
• Dry run
• Build profiles
• Profile properties

User-Defined Plugins

How to write your own plugin

How to write a simple plugin

• Understanding Mojo
• Build and usage
• Parameters
• Logging
• Documentation

Wrapping Up

Overview of the upcoming Maven 4

• Better support for multi-project builds
• Improved dependency management
• Possibility of non-XML POM

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