This project demonstrates a complete CI/CD pipeline for automating the build, test, and deployment process of a Java web application using Jenkins, Ant, JUnit, Tomcat, and GitHub — entirely on a Windows environment.

• Java (JDK 21)
• Apache Ant – Build tool for generating WAR file
• JUnit – Unit testing framework
• Apache Tomcat 9 – Deployment server
• Git & GitHub – Source code management
• Jenkins – CI/CD automation

The Java project contains a pom.xml and a standard Ant build.xml file used to compile and package the application into a .war file.

The pipeline consists of four connected Jenkins jobs, each with a specific responsibility.

• Pulls code automatically from GitHub repository
• Uses Poll SCM to trigger builds on code changes
• Cleans workspace and fetches latest commit

• Runs Ant build commands
• Compiles Java source files
• Creates output directory and generates the WAR file
• Performs basic quality checks

• Executes JUnit test cases
• Fails the job automatically if any test case fails
• Publishes JUnit test results in Jenkins dashboard

• Deploys the generated WAR file to a local Tomcat server
• Uses the Jenkins Deploy to Container plugin
• Tomcat Manager credentials are configured in Jenkins
• WAR deployed using the Tomcat Manager /manager/html API

The jobs run in sequence: GitHub → FirstJob → SecondJob → ThirdJob → FourthJob → Tomcat

• If any job fails, the pipeline stops.
• If all jobs succeed, the updated web application is deployed to Tomcat.

• Java JDK
• Apache Ant
• Apache Tomcat
• Git for Windows
• Jenkins (Windows Installer)

JAVA_HOME ANT_HOME CATALINA_HOME PATH (added git, ant, java)

A fully automated CI/CD pipeline that:

1. Downloads latest code
2. Builds WAR file
3. Runs tests
4. Deploys to Tomcat

All with one pipeline execution.

• Jenkins Jobs

• 

• Build History

• 

• JUnit Reports

• 

• Tomcat Deployment Status

• 

Feel free to fork this project and improve it!

             +-----------------------+
             |     GitHub Repo       |
             |  (SampleWebApp.git)   |
             +-----------+-----------+
                         |
                         | Poll SCM
                         v
             +-----------------------+
             |     Jenkins Job 1     |
             |     FIRSTJOB          |
             |  Clone from GitHub    |
             +-----------+-----------+
                         |
                         | Trigger
                         v
             +-----------------------+
             |     Jenkins Job 2     |
             |     SECONDJOB         |
             | Build .war via ANT    |
             +-----------+-----------+
                         |
                         | Trigger
                         v
             +-----------------------+
             |     Jenkins Job 3     |
             |      THIRDJOB         |
             |  Run JUnit tests      |
             +-----------+-----------+
                         |
                         | Trigger
                         v
             +-----------------------+
             |     Jenkins Job 4     |
             |     FORTHJOB          |
             | Deploy WAR to Tomcat  |
             +-----------+-----------+
                         |
                         v
             +-----------------------+
             |    Apache Tomcat      |
             |   Running WAR App     |
             +-----------------------+

For queries, reach out on LinkedIn 😊