The Paketo GraalVM Buildpack is a Cloud Native Buildpack that provides the GraalVM implementations of JREs and JDKs.

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

This buildpack will participate if any of the following conditions are met

• Another buildpack requires jdk
• Another buildpack requires jre

The buildpack will do the following if a JDK is requested:

• Contributes a JDK to a layer marked build and cache with all commands on $PATH
• Contributes $JAVA_HOME configured to the build layer
• Contributes $JDK_HOME configure to the build layer
• If metadata.native-image = true
  • Installs the Native Image Substrate VM into the JDK
  • Prevents the JRE from being installed, even if requested

The buildpack will do the following if a JRE is requested:

• Contributes a JRE to a layer with all commands on $PATH
• Contributes $JAVA_HOME configured to the layer
• Contributes -XX:ActiveProcessorCount to the layer
• Contributes $MALLOC_ARENA_MAX to the layer
• Disables JVM DNS caching if link-local DNS is available
• If metadata.build = true
  • Marks layer as build and cache
• If metadata.launch = true
  • Marks layer as launch
• Contributes jvmkill to a layer marked launch
• Contributes Memory Calculator to a layer marked launch

The buildpack optionally accepts the following bindings:

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