Apache Maven - From the reason to the implementation

Apache Maven
Endrigo Antonini
segunda-feira, 22 de julho de 13

Apache Maven
From the reason to the implementation
Endrigo Antonini

Endrigo Antonini

Agenda
What is Maven?
Why use Maven?
How POM works?
What is a Repository?
Why using a Local Cache sever?
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What is ...
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What is Maven?
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What is Maven?
Was originally designed to simplify the build
processes in the Jakarta Turbine project;
Create a standard way to build the project
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What is Maven?
Allow a developer to comprehend the
complete state of the development;
The main goal!!
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The main goal!!
What is Maven?
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What is Maven?
Build process easy:
Make the build process transparent to
the developer;
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What is Maven?
Build process easy:
Make the build process transparent to
the developer;
You still need to know what’s happening
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What is Maven?
Uniform build system
Just learn once how the build process
works;
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What is Maven?
Uniform build system
Just learn once how the build process
works;
Using the POM (Project Object Model) - we will
talk about this later!
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What is Maven?
Provide quality project information
Dependency list;
Unit test, coverage;
Developer list...
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What is Maven?
Best practices development
Separate test code of the main code;
Test cases do not affect the main
distribution
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What is Maven?
Best practices development
Separate test code of the main code;
Test cases do not affect the main
distribution
Maven also suggests a project structure to easily
work with the projects
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What is Maven?
Migration to new features
Easy way to update the maven, plugin,
dependency.
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Why use Maven?
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Why use Maven?
Well adopted by Java developers;
Make easy to start a project;
Don’t need to download the same lib over and
over again!
Different developers,
same conﬁg!
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How POM works?
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How POM works?
POM -> Project Object Model
XML based
Single file configuration
Structural configuration
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Divided in sections:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/
XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/
maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.eidoscode.utils</groupId>
<artifactId>generics-utils</artifactId>
<version>1.1.3-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Generics Utils</name>
<description>...</description>
<url>http://www.eidoscode.com/</url>
<inceptionYear>2012</inceptionYear>
<dependencies> ... </dependencies>
<developers> ... </developers>
<build> ... </build>
<reporting> ... </reporting>
</project>
How POM works?
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XMLSchema-instance"
maven-4.0.0.xsd">
</project>
How POM works?
Project
Information
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XMLSchema-instance"
maven-4.0.0.xsd">
</project>
How POM works?
Main group
Information
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Dependency?
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Used to indicated the full name of a
dependency, version, and scope
Dependency?
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
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Dependency?
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Dependency?
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
The scope can be devided in:
• compile (default)
• provided
• runtime
• test
• system
• import
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Developers?
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Used to indicated the team of the project
Developers?
<developers>
<developerser>
<id>eantonini</id>
<name>Endrigo Antonini</name>
<roles>
<role>Developer</role>
</roles>
</developer>
</developers>
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Builds?
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Used to indicated plugins conﬁgurations about
the build process
Builds?
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
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Reporting?
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Used to indicated plugins conﬁgurations about
the generated reports
Reporting?
<reporting><plugins>
<plugin>
<artifactId>maven-javadoc-plugin</artifactId>
</plugin>
<plugin>
<artifactId>maven-changes-plugin</artifactId>
<reportSets><reportSet>
<reports>
<report>github-report</report>
</reports>
</reportSet></reportSets>
</plugin>
</plugins></reporting>
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What is a repository?
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What is a repository?
Stores libraries and it’s different versions;
There are several repositories throught the
web;
Anyone can create a repository of his own libs;
Easy to download libs;
Easy to distribute libs;
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Why using a Local
Cache Server?
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Why using a Local
Cache Server?
Reduces the internet conectivity;
Guarantee that all developers use the same lib;
First download is slow (through the internet)
other downloads are faster (local network);
Easy to distribute private libs;
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Reference:
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Reference:
http://maven.apache.org/
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Endrigo Antonini
http://www.linkedin.com/in/endrigoantonini/
http://www.github.com/eidoscode/
http://www.github.com/antonini/

Apache Maven - From the reason to the implementation

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