Jakob Jenkov. Last update: 2. Maven is a powerful build tool for Java software projects. Actually, you can build. Maven Quick Guide - Learn Apache Maven in simple and easy steps starting from Environment Setup, Build Life Cycle, Build profiles, Repositories, POM, Plug-ins. Java SE 7 Features and Enhancements Java Platform, Standard Edition 7 is a major feature release. This document includes information on features and enhancements in. If you are seeing Java was Started but Returned Exit Code=13 in Eclipse then here is 4 reason which causing this error and solutions for it. Maven is developed in Java, and is. Java projects. Therefore this. Maven. Once you understand the core concepts. Maven documentation, or search. You will find out what Maven really is, once. However, this tutorial has been updated. The updates were tested with Maven 3. Additionally, an automated build tool is typically faster. In summary, what you need to do is. Set the JAVA. Java 8). Download and unzip Maven. Installation¶ Installation is rather a misnomer for Selenium. Selenium has a set of libraries available in the programming language of your choice. Codebase URL of Downloaded Code Codebase URL in Policy Match? 1.1 Introduction. Robot Framework is a Python-based, extensible keyword-driven test automation framework for end-to-end acceptance testing and acceptance-test-driven. What is the POM? POM stands for "Project Object Model". It is an XML representation of a Maven project held in a file named pom.xml. When in the presence of Maven. ActiveMQ will be installed in /usr/local/Cellar/apache-activemq/x.x.x/ directory (where x.x.x denotes the actual version being installed). Now you can proceed to #. Also encountered this on OS X after updating Mavericks, when the old Java 6 was being used and tried to access an https URL. Fix was the inverse of Peter Kriens, I. Set the M2. Maven 3. Java version 1. 5 or later. Remember, it has to be an SDK (Software Developer Kit), not just a JRE. Java Runtime Environment). The JRE does not contain a Java compiler. Only the SDK does. A POM file is an XML representation of. JARs used) etc. The POM contains references. The POM file should be located in the root directory of the project it belongs to. Maven will then execute the. POM. A build life cycle consists. If a life cycle is requested executed, all build. If a build phase is requested executed, all build. Dependencies are. JAR files (Java libraries) that your project uses. If the dependencies are not found in the. Maven repository, Maven downloads them from a central Maven repository and puts them in your. The local repository is just a directory on your computer's hard disk. You can also specify. All this will be explained in more detail. If you need to perform a set of actions. Maven build phases and goals, you can add a plugin. POM file. Maven has some standard plugins you can use, and you can also implement your own in Java. For instance, you may need. And you may need to build it. These two builds may be different. To enable different builds. POM files. When executing Maven you can tell which build profile. Ant. Ant is another popular build tool by Apache. If you are used to Ant and you are trying to learn Maven. You can specify low level actions like copying files, compiling code etc. You specify the. actions, and you also specify the sequence in which they are carried out. Ant has no default directory. The POM file describes your project resources - not how to. Contrarily, an Ant file describes how to build your project. In Maven, how to build your project. Maven Build Life Cycles, Phases and Goals. How to. build it is up to the Maven build phases and goals. You can insert custom actions (goals) into the Maven. The POM file is named pom. A project divided into subprojects will typically have one. POM file for the parent project, and one POM file for each subproject. This structure allows. Use the one. matching the Maven version you are using. Version 4. 0. 0 matches Maven version 2 and 3. For instance. for my Java Web Crawler project I may choose the group ID com. If the project was an open source. ID related to the project. ID related to my company. Thus, com. javawebcrawler could be used. But, if you do, the project will be located in the Maven repository under a directory structure matching. ID. The group. ID com. MAVEN. The. MAVEN. In the case of my Java Web Crawler. ID would be java- web- crawler. The artifact ID is used as name for a subdirectory. ID directory in the Maven repository. The artifact ID is also used as part of the name. JAR file produced when building the project. The output of the build process, the build result that is. Maven. Most often it is a JAR, WAR or EAR file, but it could also be something else. If your project has been released. API, then it is useful to version the builds. That way. users of your project can refer to a specific version of your project. The version number is used as a name. ID directory. The version number is also used as. These elements are listed in the Maven POM reference (see link above). See the Maven POM reference for more information about what can be specified. If no super POM is specified, the POM file inherits. POM. Here is a diagram illustrating that. You can make a POM file explicitly inherit from another POM file. That way you can change the settings across. POM's via their common super POM. You specify the super POM at the top of a POM file like this. Just specify new settings in the inheriting. POM file. You can get Maven to show you. POM using this command. This command will make Maven write out the effective POM to the command line prompt. In the settings files you can configure settings for Maven. Maven POM files. For instance, you can configure. Location of local repository. Active build profile. Etc. The two settings files are located at. The Maven installation directory: $M2. If both files are present, the values in the user home settings file overrides the. Maven installation settings file. When executing. the mvn command you pass the name of a build life cycle, phase or goal to it, which Maven then executes. Actually, this command executes all build phases before install. Here is an example. This command executes the copy- dependencies goal of the dependency build phase. If you follow that directory structure for your project. The test directory contains the test. The java directories under main and test. Java code for the application itself (under main) and the. Java code for the tests (under test). This. could be property files used for internationalization of an application, or something else. The webapp directory will then be the root directory. Thus the webapp directory. WEB- INF directory etc. It contains all the compiled. JAR files etc. When executing the clean. These JAR files are needed on the classpath when you. Each external JAR may again also need other external JAR. Downloading all these external dependencies (JAR files) recursively and. You specify in the POM file what. Maven downloads. them for you and puts them in your local Maven repository. If any of these external. Maven repository. Here is an example. Inside it are two dependency. Each dependency element describes an external dependency. If the dependencies are already found in your local repository, Maven. Only if the dependencies are missing will they be downloaded into your local repository. You can then download the. Maven repository. Remember to put it into a subdirectory. Id, artifact. Id and version. Replace all. dots (.) with / and separate the group. Id, artifact. Id and version. Then you have your subdirectory structure. It may be located. Most dependencies are external to. The rest of the path is relative from that directory. Instead of constantly updating. Always downloading the snapshot dependencies. Here is a version element example. SNAPSHOT< /version>. Notice the - SNAPSHOT appended to the version number. Here is an example. Id> com. jenkov< /group. Id>. < artifact. Id> java- web- crawler< /artifact. Id>. < version> 1. SNAPSHOT< /version>. The - SNAPSHOT appended to the version number tells Maven that this. The meta data are POM. JAR file belongs to, including what external dependencies. JAR has. It is this meta data that enables Maven to download dependencies of your. First in the local repository. POM. This repository will contain. Maven downloads. The same Maven repository is typically used for several. Thus Maven only needs to download the dependencies once, even if multiple. That way your other projects can use the packaged JAR. Maven POM files. However, you can change the location of the local repository by. Maven settings file. Your Maven settings file. Here is how you specify another location for your local. Repository>. d: \data\java\products\maven\repository. Repository>. < /settings>. Central Repository. The central Maven repository is a repository provided by the Maven community. Maven then downloads these dependencies into. You need no special configuration to access the central. A remote repository can be located. Instead it can be hosted in an internal. Put the following. XML elements right after the < dependencies> element. Maven Build Life Cycles, Phases and Goals. When Maven builds a software project it follows a build life cycle. The. build life cycle is divided into build phases, and the build phases. Maven build life cycles, build phases and goals. Maven Introduction to Build Phases. I will give you a quick overview. These are. defaultcleansite. Each of these build life cycles takes care of a different aspect of building a. Thus, each of these build life cycles are executed independently. You can get Maven to execute more than one build life cycle, but. Maven commands. The clean life cycle handles everything. JAR files etc. The site. Note: You cannot execute the. You have to specify a build phase or goal inside the. Thus, executing the install build phase really means executing. The default life cycle. I will not describe them all here. This also makes sure the dependencies are downloaded. Compiles the source code of the project. Runs the tests against the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed. Packs the compiled code in its distributable format, such as a JAR. Install the package into the local repository, for use as a dependency in other projects locally. Copies the final package to the remote repository for sharing with other developers and projects. Here. is an example. This example executes the package build phase, and thus also all build phases. Maven's predefined build phase sequence. A goal can be bound to one or. If a goal is not bound to any build phase, you can. If a goal is. bound to multiple build phases, that goal will get executed during each of the build phases. Instead of creating. POM files, you can just specify a profile with the different build configuration, and build. Each build profile. Here is an example. This could be changing the applications configuration file to use etc. This. element describes the condition that triggers this build profile to be used. One way to. choose what profile is being executed is in the settings. There you. can set the active profile. Another way is to add - P profile- name to the Maven command. See the profile documentation for more information. You do so by creating.
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