Maven web application project

Java version: 11

Clean fresh application code is available in hell-world-maven branch and hello-world-maven tag

To clone the hello-world-maven branch

git clone -b hello-world-maven https://github.com/vigneshsweekaran/hello-world.git

To generate the package

mvn clean package

War file is generated in target/hello-world.war

Adding jackson library

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.15.2</version>
</dependency>

Adding jacoco plugin

<plugin>
  <groupId>org.jacoco</groupId>
  <artifactId>jacoco-maven-plugin</artifactId>
  <version>0.8.7</version>
  <executions>
    <execution>
        <goals>
          <goal>prepare-agent</goal>
        </goals>
    </execution>
    <execution>
        <id>report</id>
        <phase>prepare-package</phase>
        <goals>
          <goal>report</goal>
        </goals>
    </execution>
  </executions>
</plugin>

To generate jacoco code coverage report using maven

mvn jacoco:report

Code coverage report is located in target/site/jacoco/index.html

Github Actions

Topic	Branch name
First pipeline	first-pipeline
How to build a maven project	maven-build
How to define parallel jobs	parallel-jobs
How to depend on another job	needs
How to pass artifacts from one job to another	publishartifacts
How to use different agent pool for jobs or stages	agentpool-jobs
How to build a maven project and cache the dependencies	maven-build-cache
How to build a Docerfile and push to dockerhub	maven-docker-build-push
How to build a Docerfile and push to Jfrog	maven-docker-build-push-jfrog
How to deploy the container to a server	maven-build-deploy
Deploy to kubernetes using kubectl using ssh	deploy-k8s-kubectl-ssh
Build helm chart from piepline and push to jfrog helm repository	helm-jfrog
Deploy to kubernetes using helm using ssh	deploy-k8s-helm-ssh

Tested polling for polling

Issues Faced

Build failed with Java 21

WARNING Error injecting: org.apache.maven.plugin.war.WarMojo
com.google.inject.ProvisionException Unable to provision, see the following errors:

Error injecting constructor, java.lang.ExceptionInInitializerError: Cannot access defaults field of Properties
  at org.apache.maven.plugin.war.WarMojo.<init>(Unknown Source)
  while locating org.apache.maven.plugin.war.WarMojo

Fix: Use the latest plugin version

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-war-plugin</artifactId>
  <version>3.3.1</version>
</plugin>