Implementation:Ray project Ray Build Jar Multiplatform

Knowledge Sources	Ray
Domains	Build_Systems, Java_Packaging
Last Updated	2026-02-13 17:00 GMT

Overview

External tool documentation for the build-jar-multiplatform.sh script that builds and assembles Ray Java JARs.

Description

The java/build-jar-multiplatform.sh script contains functions for building single-platform JARs (build_jars), downloading pre-built platform-specific JARs from S3 (download_jars), assembling multiplatform JARs (build_jars_multiplatform), and deploying to Maven Central (deploy_jars). Uses Maven with 16 parallel threads and requires Java 8.

Usage

Run in CI for Java artifact production.

Code Reference

Source Location

• Repository: ray-project/ray
• File: java/build-jar-multiplatform.sh (L28-175)

Signature

build_jars(platform, bazel_build)
build_jars_multiplatform()
download_jars(destination, commit)
deploy_jars()

I/O Contract

Inputs

Name	Type	Required	Description
platform	String	Yes	"linux", "darwin", or "multiplatform"
bazel_build	Boolean	No	Whether to run Bazel native builds

Outputs

Name	Type	Description
JARs	Files	ray-api, ray-runtime, ray-serve JAR files with native binaries

Usage Examples

Build Single Platform

cd java && bash build-jar-multiplatform.sh build_jars linux true

Related Pages

Implements Principle

• Principle:Ray_project_Ray_Java_JAR_Building

Requires Environment

• Environment:Ray_project_Ray_CI_Build_Matrix_Environment