loom-fiber

This repository contains both my experimentation of the OpenJDK project Loom prototype and a presentation and examples showing how to use it.

There is a presentation of the loom project wiht the examples.

How to build

Download the latest early access build of jdk-20 http://jdk.java.net/ set the environment variable JAVA_HOME to point to that JDK and then use Maven.

  export JAVA_HOME=/path/to/jdk
  mvn package

How to run the examples

On top of each example, there is the command line to run it.

• Loom is a preview version so --enable-preview is required,
• For ScopeLocal and StructuredTaskScope, these are not yet part of the official API and are declared in module/package jdk.incubator.concurrentso this module has to be added to the command line with --add-modules jdk.incubator.concurrent,
• If you want to play with the internals, the class Continuation is hidden thus --add-exports java.base/jdk.internal.vm=ALL-UNNAMED should be added to the command line.

AsyncScope

This repository also contains a high-level structured concurrency construct named src/main/java/fr/umlv/loom/structured/AsyncScope.java that is a proposed replacement to the more low level StructuredTaskScope currently provided by the OpenJDK loom repository.

Loom actor framework

At some point of the history, this project was containing an actor system based on loom. It has now its own repository https://github.com/forax/loom-actor.

Loom expressjs

There is a re-implementation of the expressjs API in Java using Loom JExpressLoom.java.