openjdk-cnb

README

openjdk-cnb

The Cloud Foundry OpenJDK Buildpack is a Cloud Native Buildpack V3 that provides OpenJDK JREs and JDKs to applications.

This buildpack is designed to work in collaboration with other buildpacks which request contributions of JREs and JDKs.

Detection

The detection phase always passes and contributes nothing to the build plan, depending on other buildpacks to request contributions.

Build

If the build plan contains

• openjdk-jdk

  • Contributes a JDK to a layer marked build and cache with all commands on $PATH
  • If $BP_JAVA_VERSION is set, configures a specific version. This value must exactly match a version available in the buildpack so typically it would configured to a wildcard such as 8.*.
  • Contributes $JAVA_HOME configured to the build layer
  • Contributes $JDK_HOME configure to the build layer

• openjdk-jre

  • Contributes a JRE to a layer with all commands on $PATH
  • If $BP_JAVA_VERSION is set, configures a specific version. This value must exactly match a version available in the buildpack so typically it would configured to a wildcard such as 8.*.
  • Contributes $JAVA_HOME configured to the layer
  • If metadata.build = true
    • Marks layer as build and cache
  • If metadata.launch = true
    • Marks layer as launch

License

This buildpack is released under version 2.0 of the Apache License.