Enhancing java tool usage in azure devops

Question

I want to enhance pipeline with out using java installer task and also user should have ability to choose respective JDK versions. how we can achieve this

Answer 1

Hi tarun k

As we discussed in private message,

At the top of your BuildPipelinetemplate-dotnet.txt, add this for JDK selection:

- name: jdk_version
  type: string
  default: '17'
  values:
    - '8'
    - '11'
    - '17'
    - '21'

then replace JavaToolInstaller@0 with a Dynamic Script

Remove this task:

then Insert this:

- script: |
    echo "Setting JAVA_HOME for JDK version: ${{ parameters.jdk_version }}"
    case "${{ parameters.jdk_version }}" in
      '8')
        echo "##vso[task.setvariable variable=JAVA_HOME]/usr/lib/jvm/java-8-openjdk-amd64"
        ;;
      '11')
        echo "##vso[task.setvariable variable=JAVA_HOME]/usr/lib/jvm/java-11-openjdk-amd64"
        ;;
      '17')
        echo "##vso[task.setvariable variable=JAVA_HOME]/usr/lib/jvm/java-17-openjdk-amd64"
        ;;
      '21')
        echo "##vso[task.setvariable variable=JAVA_HOME]/usr/lib/jvm/java-21-openjdk-amd64"
        ;;
    esac
  displayName: 'Set JAVA_HOME based on jdk_version'
  shell: bash

In your main pipeline, pass the desired JDK version like this:

- template: /DevOps/templates/Build/NET Core/build-pipeline-template.yml@JDK
  parameters:
    ...
    jdk_version: 'jdk17'

Hope this helps!

Please Let me know if you have any queries.

Answer 2

Hi tarun k

To enhance an Azure DevOps pipeline for users to select JDK versions without using the Java installer task, consider using pre-installed JDKs on the agent.

You can specify the JDK version you want to use by passing a parameter to the pipeline:

parameters:
  - name: jdkVersion
    type: string
    default: '11'
    values:
      - '8'
      - '11'
      - '17'
jobs:
  - job: Build
    pool:
      vmImage: 'ubuntu-latest'
    steps:
      - script: |
          if [ '${{ parameters.jdkVersion }}' == '11' ]; then
            echo "##vso[task.setvariable variable=JAVA_HOME]$JAVA_HOME_11_X64"
          elif [ '${{ parameters.jdkVersion }}' == '8' ]; then
            echo "##vso[task.setvariable variable=JAVA_HOME]$JAVA_HOME_8_X64"
          fi
          echo "##vso[task.setvariable variable=PATH]$JAVA_HOME/bin:$PATH"
        displayName: 'Set JAVA_HOME'

Additional References:

https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/java-tool-installer-v0?view=azure-pipelines

Hope this helps!

Please Let me know if you have any queries.