Webinar presentation http://www.returnonintelligence.ru/webinars/apachemaven2/

1. Exigen Services confidential Exigen Services confidential
Apache Maven 2. Part 1: Overview
Getting started with Apache Maven 2
Nikolay Khasanov, Anatoly Kondratyev
October 2012
20 July 2015

2. Exigen Services confidential
The Goal
• Understand Maven principles
• Build project with Maven
• Compare to Apache Ant
2

3. Exigen Services confidential
GETTING STARTED
What is Maven?
3

4. Exigen Services confidential
Glossary
• Artifact
• .jar, .ear, .war, .pom, etc.
• GroupId, ArtifactId, Version
• Maven repository
• Holds artifacts
• Dependency
• POM file (Project Object Model)
4

5. Exigen Services confidential
What is Maven?
• Build automation tool
• Open Source: Apache License 2.0
• Knowledge accumulator
• Declarative logic instead of imperative
5

6. Exigen Services confidential
Maven’s Objectives
• Making the build process easy
• Providing a uniform build system
• Providing quality project information
• Providing guidelines for best practices
development
6

7. Exigen Services confidential
CORE MAVEN 2
Change your mind
7

8. Exigen Services confidential
Maven project
pom.xml
source
code
generated
code
resources binary
files
RepositoriesProject lifecycle
plug-in plug-in plug-in
Project
Object
Model
Dependency
Manager
8

9. Exigen Services confidential
groupId
artifactId
version
type
Repository
Project Object Model (pom.xml)
• Identification
• Hierarchy
• Structure
• Dependencies
• Build settings
my-app
parent
another-app
Spring
2.5.6
Junit
4.5
Servlet
API
2.5
my-app
9
project
home
sources
classes
etc.

10. Exigen Services confidential
Super POM
• Package: jar
• Default project structure
• Default artifacts Repository
• Default plugins
10

11. Exigen Services confidential
Default folders structure
11

12. Exigen Services confidential
Maven does your work
• Store only source code
• Maven knows how to build
• Dependencies are stored in shared
repository
12

13. Exigen Services confidential
Transitive dependencies
my-app
dependency.1 dependency.2 dependency.3
dependency.1.1 dependency.1.2
13

14. Exigen Services confidential
Dependency scope
Result
Scope
Compile
classpath
Runtime
classpath
Test
classpath
Lookup
repository
compile + + + +
provided + - + +
runtime - + + +
test - - + +
system + - + -
import Maven 2.0.9 or later, replaces POM with
<dependencyManagement>
14

15. Exigen Services confidential
Maven Repository
User workstation Local network Internet
internal external
Central (default)
Local repository External repositories
user local
16
Maven

16. Exigen Services confidential
MAVEN IN ACTION
Simple Maven project example
17

17. Exigen Services confidential
Installation
1. Requirements:
• JRE/JDK 1.4 or higher
2. Download
3. Unzip
4. Setup environment variables:
• M2_HOME
• M2
• PATH
5. Enjoy 
18

18. Exigen Services confidential
Configuration
• Global
• <M2_HOME>/conf/settings.xml
• User local
• <USER_HOME>/.m2/settings.xml
19

19. Exigen Services confidential
mvn
• mvn [goal(s)] [phase(s)] [options]
• goal = plugin:goal
• phase = phase-name
• Examples:
• mvn compiler:compile
• mvn install –X –DsomeProperty=10
21

20. Exigen Services confidential
Build lifecycle
1. validate
2. compile
3. test
4. package
5. integration-test
6. verify
7. install
8. deploy
22
check pom.xml
compile the source
run unit tests
create jar/war/...
run integration tests
verify the package
publish package to local repo
publish package to remote repo

21. Exigen Services confidential
Start-up new project
mvn archetype:create
-DarchetypeGroupId=org.apache.maven.archetypes
-DgroupId=com.exigenservices.training
-DartifactId=myjsf
23
Result:
• Default folder structure
• pom.xml
• First java class
• First unit-test class

22. Exigen Services confidential
pom.xml: Minimal POM
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>com.exigenservices.app</groupId>
<artifactId>myjsf</artifactId>
<version>SNAPSHOT</version>
</project>
24

23. Exigen Services confidential
pom.xml: Dependencies
<project>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.6</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
25

24. Exigen Services confidential
pom.xml: Plug-ins configuration
<project>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
26

25. Exigen Services confidential
Build project
27
• mvn install
1. validate
2. compile
3. test
4. package
5. install

26. Exigen Services confidential
Install and Deploy
28
developer 1local
developer 2local
developer Nlocal
…
install
internal
external
Local network Internet
deploy

27. Exigen Services confidential
When deploy is needed?
• Release
• Update snapshot
• Available for other projects
29

28. Exigen Services confidential
Add repository
<repositories>
<repository>
<id>Jboss.repository</id>
<url>
http://repository.jboss.org/maven2
</url>
</repository>
</repositories>
30

29. Exigen Services confidential
IDE INTEGRATION
Develop with pleasure!
31

30. Exigen Services confidential
IDE list
• InteliJ IDEA from 7.0
• Eclipse (plug-in: “m2eclipse”)
• NetBeans 6.5
32

31. Exigen Services confidential
IDE features
• POM editor
• Dependency synchronization
• Lifecycle build runners
33

32. Exigen Services confidential
CONCLUSION
Let’s summarize
34

33. Exigen Services confidential
Advantages (vs. Ant)
• Know Maven – can build project
• Dependency management
• Less CM activities
• Force to standardization
• Readable pom.xml
• High reusability
35

34. Exigen Services confidential
Disadvantages (vs. Ant)
• Understanding
• Artifacts search
• Plug-ins documentation
• “Exotic things” - maven-ant-plugin
• Difficult to move from Ant
36

35. Exigen Services confidential
Maven repositories
• Central
http://repo1.maven.org/maven2/
• Central repository Explorer
http://mvnrepository.com
• Collection of plugins for Maven 2
http://mojo.codehaus.org
• JBoss
http://repository.jboss.com/maven2/
• Sun
http://download.java.net/maven/2/
• Atlassian
http://repository.atlassian.com/maven2/
37

36. Exigen Services confidential
References
• Maven site
http://maven.apache.org
• Quick guide
http://maven.apache.org/guides/MavenQuickReferenceCard.pdf
• Maven FAQ
http://docs.codehaus.org/display/MAVENUSER/FAQs-1
• Better Builds with Maven. John Casey and others
http://www.exist.com/better-build-maven
• Maven overview in Russian
http://www.ibm.com/developerworks/ru/edu/j-mavenv2/index.html
• m2eclipse plug-in
http://m2eclipse.codehaus.org
38

37. Exigen Services confidential
QUESTIONS
Now it’s your turn…
39