J2V8 is a set of Java bindings for V8. J2V8 focuses on performance and tight integration with V8. It also takes a 'primitive first' approach, meaning that if a value can be accessed as a primitive, then it should be. This forces a more static type system between the JS and Java code, but it also improves the performance since intermediate Objects are not created.
We developed J2V8 as a high performance engine for our multi-platform mobile toolkit tabris.js and it is a great choice for executing JavaScript on Android devices.
Building J2V8 requires building both the native parts and the Java library (.jar/.aar file). To build the native parts we first build node.js as a library and then statically link J2V8 to that. The Java parts are built with maven/gradle.
J2V8 uses a cross-platform, cross-compiling build-system written in Python.
Follow these steps to build J2V8 from source:
- clone the Node.js source code
python prepare_build.py- This will download & prepare the latest compatible Node.js version for use in J2V8
- The Node.js source code will be cloned into the local
nodesub-directory, which is the expected default location for the J2V8 build
- build Node.js and the J2V8 library
python build.py --target linux --arch x64 --node-enabled --cross-compile- or shorthand
python build.py -t linux -a x64 -ne -x
For all available options, supported platforms and architectures you can consult the build-script help:
python build.py --help
For cross-compiling J2V8 uses Docker (android, linux, windows) and Vagrant (macos). The full source-code (of both J2V8 and Node.js) on the build-host are just shared via mounted volumes with the Docker / Vagrant machines, so you can quickly make changes and perform builds fast.
To invoke a cross-compile build, simply invoke the build.py script as usual but add the --cross-compile, -x flag.
This will automatically provision and run the necessary virtualization to run the requested build fully independent of your local environment.
Note: using Docker / Vagrant for cross-compiliation requires many gigabytes of harddrive space as well as downloading the required images & tools.
- Getting Started With J2V8
- Registering Java Callbacks with J2V8
- Implementing WebWorkers with J2V8
- Multithreaded JavaScript with J2V8
- Using J2V8 with Heroku
- Announcing J2V8 4
- Running Node.js on the JVM
- Shipping J2V8 as an AAR
- Announcing J2V8 3.0
- J2V8 2.2 New and Noteworthy
- Announcing J2V8 2.0
- Highly Efficient Java & JavaScript Integration
Here is a list of articles I've written on J2V8 http://eclipsesource.com/blogs/tag/j2v8/.
Here are some projects that use J2V8:
The code is published under the terms of the Eclipse Public License, version 1.0.