How many projects use maven

Maven reads pom. Dependencies and Repositories: Dependencies are external Java libraries required for Project and repositories are directories of packaged JAR files. The local repository is just a directory on your machine hard drive. If the dependencies are not found in the local Maven repository, Maven downloads them from a central Maven repository and puts them in your local repository.

Build Life Cycles, Phases and Goals: A build life cycle consists of a sequence of build phases, and each build phase consists of a sequence of goals. Maven command is the name of a build lifecycle, phase or goal. If a lifecycle is requested executed by giving maven command, all build phases in that life cycle are executed also. If a build phase is requested executed, all build phases before it in the defined sequence are executed too.

Build Profiles: Build profiles a set of configuration values which allows you to build your project using different configurations. For example, you may need to build your project for your local computer, for development and test. To enable different builds you can add different build profiles to your POM files using its profiles elements and are triggered in the variety of ways. Build Plugins: Build plugins are used to perform specific goal. Maven has some standard plugins you can use, and you can also implement your own in Java.

Installation process of Maven The installation of Maven includes following Steps:. It is an XML file that contains information related to the project and configuration information such as dependencies , source directory , plugin , goals etc.

The sample of pom. Use version 4. It is unique and Most often you will use a group ID which is similar to the root Java package name of the project like we used the groupId com. If your project has been released in different versions then it is useful to give version of your project. Other Elements of Pom. This site is separated into the following sections, depending on how you'd like to use Maven:.

Each guide is divided into a number of trails to get you started on a particular topic, and includes a reference area and a "cookbook" of common examples. You can access the guides at any time from the left navigation.

If you are looking for a quick reference, you can use the documentation index. To get started, search the documentation, issue management system , the wiki or the mailing list archives to see if the problem has been solved or reported before. If the problem has not been reported before, the recommended way to get help is to subscribe to the Maven Users Mailing list. Show 1 more comment. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. Now live: A fully responsive profile. Linked 3. Related Hot Network Questions. However, that would work if the parent project was already installed in our local repository or was in that specific directory structure parent pom. But what if the parent is not yet installed and if the directory structure is as in the following example?

As the name suggests, it's the relative path from the module's pom. Project Aggregation is similar to Project Inheritance. By doing so, the parent project now knows its modules, and if a Maven command is invoked against the parent project, that Maven command will then be executed to the parent's modules as well. To do Project Aggregation, you must do the following:.

In the revised com. Now, whenever a Maven command processes com. Furthermore, some commands goals specifically handle project aggregation differently. If you have several Maven projects, and they all have similar configurations, you can refactor your projects by pulling out those similar configurations and making a parent project. Thus, all you have to do is to let your Maven projects inherit that parent project, and those configurations would then be applied to all of them.

And if you have a group of projects that are built or processed together, you can create a parent project and have that parent project declare those projects as its modules. By doing so, you'd only have to build the parent and the rest will follow.