Maven is a widely used project object model-POM used in managing and building projects that are Java-based for Maven lifecycle management. This power tool for Maven lifecycle phases and goals in project management is typically used for project documentation, dependency, and build, making the life of Java developers’ day-to-day work easy and manageable. The open-source tool for enterprise-build takes the burden out of the build process, making it easy to maintain and reducing the time involved in script builds. Besides, it promotes standards for development that are company-wide.
The acronym MAVEN is drawn from Mars Atmosphere and Volatile Evolution, which NASA used with a Maven lifecycle to provide character to the Martian atmosphere, reconstruct how and why Mars lost its water, and use the data collected to reconstruct Martian climate history.
The Maven build lifecycle has 8-stages by default. These are in a particular Maven lifecycle order, as mentioned below.
In any Java project, the 8-phases of the Maven build life cycle and what they accomplish are discussed below.
Note that, Maven always follows a sequential order of Maven lifecycle steps. This means if one runs the step-n commands, then all preceding steps of the Maven lifecycle from 1 to n-1 also get executed. Thus if one commands the lifecycle mapping Maven code to install, it will automatically run all the preceding phases and go ahead with validation, compilation, packaging, and project verification with the running unit and run all integration testing steps before it moves into the installation of the package to the local Maven repository.
Maven interview questions which are a favorite with interviewers looking to quiz developers on knowledge of Maven are questions about the Maven commands discussed below.
Typically, the Maven clean command is added to the targeted folder to ensure all previous-build files are removed before running the new build. On integrating the 2 steps, the command is a clean step with an install step and reads mvn clean install command. Similarly, one can add the debug mode to the Maven installation steps by adding –X to the install command, which then reads mvn -X install.
Just in case one decides not to run the tests in the Maven package command for packaging or installation steps of the Java project, one can use the -DskipTests with the install, package, or other commands. The command to run the skip mvn test while installing would then read mvn install –DskipTests.
Any build is made by a set of goals. A Maven goal represents a specific task. A task that contributes to building and managing a project. However, a maven goal is sometimes not bound to a build phase. These goals can then be executed through a command line.
The syntax to execute a goal is:
$ mvn plugin-prefix:goal
$ mvn plugin-group-id:plugin-artifact-id[:plugin-version]:goal
The tool MAVEN is used in the Maven lifecycle management of Java scripted tool project object models. It simplifies the ANT build process and meets the Java developer’s needs for a time-saving tool for scriptwriting and maintenance, project dependency, documentation, and builds. It is critical to the Maven lifecycle and a potent tool for understanding any project that is Java-based. Its the ability to create war, jar, etc. Adding new dependencies, easy starts in various environments, and enabling processes like processing, building and injection make it the go-to for Java developers.