Build Java applications

Java (JDK and JVM) is not pre-installed into the agents. Specify the specific version you requires for your build. Install the framework with JavaToolInstaller@0, it configures both PATH and JAVA_HOME environements variables. The JDK file requires to be placed either in Azure Storage or in a local directory:

• Azure Storage (recommended for its audit, replication, and management by API capabilities), downlaod the binary from a central Azure Storage
• Local directory, in the context of a Kubernetes Pod, this directory could be a read-only shared volume mounted in the Pod

First, create an Azure Storage account and a container named java-temurin. Then, upload the JDK file to the container. JDK can be downloaded, as example:

• from Eclipse Temurin
• from Microsoft Build of OpenJDK (recommended for its support), based on Eclipse Temurin, but with backported fixes and enhancements not yet been formally backported upstream

Example of an example Azure Storage account named azure-pipelines-bins and a container java-temurin, with Eclipse Temurin JDK 17 and 21:

# Azure Storage
/java-temurin (container)
  /jdk
    /21
      OpenJDK21U-jdk_aarch64_linux_hotspot_21.0.1_12.tar
      OpenJDK21U-jdk_x64_linux_hotspot_21.0.1_12.tar
    /17
      OpenJDK17U-jdk_x64_linux_hotspot_17.0.9_9.tar
      [...]

Example of the Azure Pipelines YAML file:

# azure-pipelines.yaml
steps:
  - task: JavaToolInstaller@0
    inputs:
      azureCommonVirtualFile: jdk/21/OpenJDK21U-jdk_x64_linux_hotspot_21.0.1_12.tar
      azureContainerName: java-temurin
      azureResourceGroupName: AZURE_RESOURCE_GROUP_NAME
      azureResourceManagerEndpoint: AZURE_RESOURCE_MANAGER_SERVICE_CONNECTION_NAME
      azureStorageAccountName: azure-pipelines-bins
      jdkArchitectureOption: x64
      jdkDestinationDirectory: $(agent.toolsDirectory)/jdk/21
      jdkSourceOption: AzureStorage
      versionSpec: 21