Javenode

Javenode is Java + V8 + Node.js. It is a Node.js simulator with Java in V8.

Javenode is an extension of Javet (Java + V8). It aims at simulating Node.js with Java in Javet V8 mode. Why? Because Javet V8 mode is much more secure than the Node.js mode, but lacks of some basic features, e.g. setTimeout, setInterval, etc. So, these must-have API can be found in Javenode.

Feature	Javet	Javenode
External Dependencies	No	Yes
Platform Dependent	Yes	No

If you like my work, please Star this project. And, you may follow me @sjtucaocao, or visit https://blog.caoccao.com/ or http://caoccao.blogspot.com/. And the official support channel is at discord.

Major Features

• Native Event Loop (vert.x)
• Same Modules as Node.js

• Modules

  • console
  • javet
  • timers
  • timers/promises

Quick Start

Dependency

Maven

<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javenode</artifactId>
    <version>0.8.0</version>
</dependency>

Gradle Kotlin DSL

implementation("com.caoccao.javet:javenode:0.8.0")

Gradle Groovy DSL

implementation 'com.caoccao.javet:javenode:0.8.0'

Hello Javenode (Static Import)

try (V8Runtime v8Runtime = V8Host.getV8Instance().createV8Runtime();
     JNEventLoop eventLoop = new JNEventLoop(v8Runtime)) {
    eventLoop.loadStaticModules(JNModuleType.Console, JNModuleType.Timers);
    v8Runtime.getExecutor("const a = [];\n" +
            "setTimeout(() => a.push('Hello Javenode'), 10);").executeVoid();
    eventLoop.await();
    v8Runtime.getExecutor("console.log(a[0]);").executeVoid();
}

Hello Javenode (Dynamic Import)

try (V8Runtime v8Runtime = V8Host.getV8Instance().createV8Runtime();
     JNEventLoop eventLoop = new JNEventLoop(v8Runtime)) {
    eventLoop.loadStaticModules(JNModuleType.Console);
    eventLoop.registerDynamicModules(JNModuleType.TimersPromises);
    v8Runtime.getExecutor(
            "import { setTimeout } from 'timers/promises';\n" +
                    "const a = [];\n" +
                    "setTimeout(10, 'Hello Javenode')\n" +
                    "  .then(result => a.push(result));\n" +
                    "globalThis.a = a;").setModule(true).executeVoid();
    eventLoop.await();
    v8Runtime.getExecutor("console.log(a[0]);").executeVoid();
}

TODO

• To implement fetch
• To implement fs

License

APACHE LICENSE, VERSION 2.0

Documents

• Javet
• Javenode Document Portal