StudyNoteMaven.md

Maven

• POM(Project Object Model):
• pom.xml:
  • Maven project structure and contents are declared in an pom.xml file.
  • Resides in the base directory of the project
  • mandatory fields: groupId, artifactId, version

    <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.companyname.project-group</groupId>
       <artifactId>project</artifactId>
       <version>1.0</version>
    </project>
    

• Projects notation in repository is groupId:artifactId:version
• Super POM: ALL POMs inherit from a parent
• effective pom: configuration from super pom plus project configuration
• check default configurations of super POM: mvn help:effective-pom

What is Build Lifecycle?

A Build Lifecycle is a well defined sequence of phases.
A phase represents a stage in life cycle.
A goal represents a specific task.
Three standard lifecycles: clean, default/build, site
mvn clean dependency:copy-dependencies package
Executing order: phase clean --> goal dependency:copy-dependencies --> phase package

Clean Lifecycle

• clean:clean goal is bound to the clean phase in the clean lifecycle. It deletes build directory.