In this post, we will learn how to configure Jenkins to trigger a Maven project build. We will also see how Jenkins can be used to monitor the execution of our Maven builds and finally, we will look at the different ways in which we can trigger a Maven build from Jenkins.
The Jenkins Maven Project Plugin provides a build step for executing Maven goals and a post-build action for archiving the artifacts generated by the build.
With this plugin, you can specify the location of your pom.xml file and any goals or profiles you want to execute as part of your build. The plugin will also automatically generate any necessary settings files for you.
If you are using the Jenkins Pipeline plugin, there is also a dedicated mavenBuild step which can be used to run Maven goals. This step takes care of all the necessary configuration for you and can be used directly in your Pipeline script.
Jenkins Build Maven Project from Git Example
In this post, we’ll take a look at how to use Jenkins to build a Maven project from a Git repository. We’ll also see how to integrate Jenkins with GitHub so that each time you push your code to GitHub, Jenkins will automatically run a build and test your code.
Building a Maven project from Git is pretty straightforward.
In your Jenkins job configuration, you simply need to specify the location of your Git repository and then select “Build Now”.Jenkins will clone the repository and then invoke Maven to build the project.
If you want to automate the process even further, you can set up a webhook in GitHub that will trigger a build in Jenkins every time you push code to GitHub.
To do this, go into your Jenkins job configuration and under “Build Triggers”, select “GitHub hook trigger for GITScm polling”. This will add a new section called “GitHub Hooks” where you’ll need to enter the URL of your Jenkins instance. Finally, go into your GitHub repository settings and add the same URL as a webhook (under “Settings > Webhooks”).
Now every time you push code changes to GitHub, those changes will be automatically built and tested by Jenkins!
How to Build Maven Project in Jenkins Pipeline
In this blog post, we will learn how to create a Jenkins Pipeline to build a Maven project. We will start with a simple pipeline that will build a Java application using Maven. Then, we will add steps to the pipeline to execute unit tests and code coverage reports.
Finally, we will add a step to deploy the application to a Tomcat server.
Building a Maven Project in Jenkins Pipeline
Jenkins is a popular open source tool for continuous integration and continuous delivery (CI/CD).
It can be used to automate the building, testing, and deploying of applications. In this blog post, we will learn how to create a Jenkins Pipeline to build a Maven project. We will start with a simple pipeline that will build a Java application using Maven.
Then, we will add steps to the pipeline to execute unit tests and code coverage reports. Finally, we will add a step to deploy the application to a Tomcat server.
Creating the Pipeline Job in Jenkins
First, let’s create our Jenkins job.
Jenkins Maven Project
If you’re looking for a quick and easy way to get started with Jenkins, look no further than the Maven Project type. This project type is designed to work with Apache Maven, and will generate a pom.xml file automatically if one doesn’t already exist in your project. You can also specify which goals to run as part of your build, and Jenkins will handle the rest.
Run Java Code in Jenkins Pipeline
As a DevOps engineer, one of the most common tasks you’ll be asked to do is set up a continuous integration and continuous delivery (CI/CD) pipeline. This usually involves writing some code to automate the process of taking code from a source repository, building it, and then deploying it to a server.
One popular tool for setting up CI/CD pipelines is Jenkins.
In this blog post, we’ll show you how to use the Jenkins Pipeline plugin to run Java code as part of your pipeline.
First, you’ll need to install the Jenkins Pipeline plugin. You can do this from the Manage Plugins page in your Jenkins instance.
Once the plugin is installed, you’ll need to create a new Jenkinsfile in your project’s source code repository. This file will define your pipeline steps.
Next, you’ll need to add a stage to your Jenkinsfile that will compile and run your Java code.
The following example shows how you can do this:
stage(‘Build’) { // 1
steps { // 2
sh ‘javac *.java’ // 3 4
sh ‘java MyClass’ } }
In this example, we’ve added a stage called “Build” that contains two steps.
The first step runs the javac command to compile all of the Java files in our project. The second step runs our Java program using the java command.
Invoke Top-Level Maven Targets Jenkins
In today’s post, we’re going to take a look at how to invoke top-level Maven targets in Jenkins. We’ll cover the basics of what these targets are and why you might want to use them. We’ll also walk through a few examples of how to invoke them in Jenkins.
By the end of this post, you should have a good understanding of how to use top-level Maven targets in your own Jenkins projects.
What are top-level Maven targets?
Top-level Maven targets are goals that can be invoked from the command line without specifying a phase.
For example, the “clean” goal is a top-level target that will remove all compiled artifacts from your project directory. Other common top-level targets include “install” (which will install your project artifacts in your local Maven repository) and “deploy” (which will deploy your artifacts to a remote repository).
Why use top-level Maven targets in Jenkins?
There are two main reasons you might want to invoke top-level Maven targets in Jenkins: 1) To customize the build process for your specific needs, and 2) To avoid having to specify phases every time you invoke a goal.
If you need more control over your build than what is provided by the default phases, then invoking a top-level target may be necessary. For example, if you need to perform some custom processing before or after compiling your code, you would need to add an additional phase to do so. However, this would require specifying the new phase every time you invoked one of the default phases (e.g., “mvn clean compile”).
By invoking a top-Level target instead (e.g., “mvn clean”), you can avoid having to remember which extra phase needs to be specified each time.
Similarly, if there are goals that youinvoke frequently during development (e.g., “mvn install”), it can be tediousto always haveto specifythe associatedphase(“mvn package install”). In such cases, it may make sense tousea plugin that allowsyou toinvokea goal withoutspecifying itsphase(seethe next sectionfor details on suchplugins).
Alternately,you could createyour own customtop-Leveltargets thatincludethe desiredgoalsandphases(moreonthisbelow).
Jenkins Maven Plugin
Jenkins Maven Plugin
The Jenkins Maven plugin provides an interface to use the Apache Maven build system within Jenkins. It can be used to trigger builds, tests, and deploys from a central location, allowing for easier collaboration and coordination of work across teams.
Maven is a popular build tool used by many Java developers, and the Jenkins Maven plugin makes it easy to integrate Maven builds with your Jenkins installation. With this plugin installed, you can trigger Maven builds from within Jenkins and monitor their progress directly from the web UI.
If you’re new to using Maven with Jenkins, there’s a helpful tutorial on the Jenkins website that will walk you through the basics of setting up a simple build job.
Once you have a basic understanding of how the plugin works, you can start experimenting with more advanced features like release management or integrating with other tools in your development workflow.
Goals And Options in Jenkins
Goals And Options in Jenkins
We have already discussed the basics of Jenkins and how to get started with it. In this blog post, we will discuss some of the advanced features of Jenkins and how they can be used to achieve different goals.
One of the most powerful features of Jenkins is its ability to run jobs on multiple nodes. This can be very useful if you want to distribute load or if you want to run jobs in parallel. To configure this, go to Manage Jenkins -> Configure System and scroll down to the Distributed Builds section.
Here you can add one or more nodes that will be used for running builds. Each node will need a label so that Jenkins knows which node should be used for which job. You can also specify labels for each slave machine so that certain jobs are only run on specific machines.
Another useful feature is Jenkins’ ability to use different types of SCM systems like Git, SVN, etc. This can be very helpful if you are working with a team that uses different SCMs or if you want to migrate your codebase from one SCM to another. To configure this, go to Manage Jenkins -> Configure System and scroll down to the Source Code Management section.
Here you can add multiple SCM systems and specify which one should be used for each project.
Jenkins also allows you define build triggers that will start a build automatically when certain conditions are met. For example, you could trigger a build whenever someone pushes new code into a Git repository or when a change is made in JIRA.
Maven Goals in Jenkins
If you’re using Jenkins to build your projects, you’ll want to know about Maven goals and how they can help with your builds.
Maven is a project management tool that can help manage dependencies and other aspects of your projects. It also has the ability to run tasks or goals during the build process.
Goals are specific tasks that you can configure Maven to run. For example, you could configure a goal to run unit tests or generate documentation.
Jenkins can be configured to run goals as part of a build job.
This can be handy if you want to do something like run unit tests before deploying your code.
To configure Jenkins to use Maven goals, you’ll need to add a “Build Step” in the job configuration. Select “Invoke top-level Maven targets” from the drop-down menu and enter the goals you want to run in the Goals field.
How Do I Run a Maven Project Using Jenkins?
Assuming that you have a Maven project set up on your local machine and that you have Jenkins installed and running, you can follow these steps to run your Maven project using Jenkins:
- Log in to the Jenkins web interface and create a new job. Give the job a name (e.g. “MyMavenProject”) and select “Build a free-style software project”.
- In the job configuration page, under the “Source Code Management” section, select “Subversion” as the type of repository and enter the URL of your Maven project’s SVN repository. If your Maven project is not using Subversion, you can select another type of repository here (e.g. Git).
- In the “Build Triggers” section, select “Poll SCM” and enter the schedule for polling the repository (e.g. */15 * * * * means poll every 15 minutes). This will tell Jenkins to check for new code commits in your Maven project’s repository and automatically build any new changes that are found.
- Under the “Build” section, add an “Invoke top-level Maven targets” build step with goals set to “package”. This will tell Jenkins to run the package goal from your Maven pom file when building this job.
- Save your changes and trigger a build by clicking on “Build Now”.
Assuming there are no errors, your build should succeed and produce a packaged version of your application in whatever output directory you have configured in your pom file (typically target/ ).
How Do I Run Maven Pom Xml in Jenkins?
What is Maven?
Maven is a build automation tool used primarily for Java projects. In essence, it is used to manage a project’s build, reporting, and documentation from a central piece of information.
What is Jenkins?
Jenkins is an open source continuous integration tool written in Java. It provides plugins for building and testing virtually any project type using practically any programming language.
So how do you run Maven POM xml in Jenkins? You first need to install the Maven Integration plugin in Jenkins. Once that’s done, you can create a new job and select “Invoke top-level Maven targets” under Build Environment.
Here you will specify the goals (or tasks) to execute as well as the POM file location. The final step is to click “Save” and then run your job!
How Do I Run My Maven Project?
Assuming you have a project with a pom.xml file in the root directory, you would run the following command from the terminal to build the project:
mvn clean install
This will compile and test your code, and then package it into a jar file.
You can then run your application by using the java -jar command, passing in the name of your jar file. For example:
How Do I Run a Jenkins Maven Project from Github?
Assuming you have a Maven project in GitHub that you want to build using Jenkins, there are a few steps you need to take.
First, create a new Jenkins job. Go to the Jenkins homepage and click “Create New Job”.
Give your job a name and select “Build a free-style software project”.
Next, under Source Code Management, select “Git” and enter the URL of your GitHub repository. If you’re using a private repository, you’ll also need to add your credentials here.
Under Build Triggers, check the box for “Poll SCM” and enter the schedule that you want Jenkins to check for changes in your GitHub repository (for example, every 5 minutes).
Finally, under Build, click on the “Add build step” dropdown and select “Invoke top-level Maven targets”. In the Goals field, enter “clean install”.
This will tell Maven to run the clean and install goals when building your project.
Click Save and then Build Now to test out your new Jenkins job!
Build Maven Project Using Jenkins | Execute Maven Project In Jenkins
Conclusion
In this blog post, we’ll learn how to execute a Maven project using Jenkins. We’ll go through the steps of creating a new Jenkins job, configuring it to use Maven, and then running our build.