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Maven - How to Build Jar Files and Obtain Dependencies

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Maven - How to Build Jar Files and Obtain Dependencies

· DevOps Zone ·
Free Resource

Learn how integrating security into DevOps to deliver "DevSecOps" requires changing mindsets, processes and technology.

This article represents facts on what would it take to  build one or more jar files for a given framework/library using  Maven, provided the framework’s downloadable files consisted of  pom.xml. Please feel free to comment/suggest if I missed to mention one or more important points. Also, sorry for the typos.
So far, whenever I came across pom.xml file in the framework that I downloaded in order to get the jar file, I hated it. I used to, then, go to internet and get the compiled jar file(s) for the framework/library. And, good thing is that I have been able to get my work done. This was purely out of my laziness that I did not use to build using maven.Then, I got a chance to work with  Twitter HBC library (Java) for integrating with Twitter. And, I downloaded it and wanted to get one or more jar files. And, once again, I came across a pom.xml in root folder and unique  pom.xml files in hbc-core, hbc-twitter4j and hbc-examples folder. This time, I decided to build the hbc jar files on my system.Following are some of the steps I took to build hbc jar files and get dependencies to run the program using hbc jar files.
  • Download and install Maven. Anyone wanting to install/configure Maven, go to this Maven in 5 Minutes page. It clearly states what needs to be done to install/configure Maven. Once configured, open a command prompt and execute command “mvn -version”. If the version information of Maven is displayed, you are all set. Once determined, go to the folder which consists of pom.xml file. In present case, go to hbc root folder.
  • Go to hbc root folder, hbc-master.
  • Execute following command to build the hbc jar files and also obtain the dependencies (jar files) required to run the library. Command is “mvn clean install -U dependency:copy-dependencies“. This command built the source file and created two different jar files in hbc-twitter4j/target (hbc-twitter4j-2.2.1-SNAPSHOT.jar) and hbc-core/target (hbc-core-2.2.1-SNAPSHOT.jar). Further to that, it downloaded all the dependent jar files in repective target/dependency folder.

Learn how enterprises are using tools to automate security in their DevOps toolchain with these DevSecOps Reference Architectures.

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